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08/06/2026, 18:00
Please sent email spaceclimate10@gmail.com by June 1 , as the number of places is limited.
Come to the DINO’S BAR & GRILL, grab a drink and join us for an informal evening of singing, light conversation, and new connections - the perfect way to set the mood before the SC 10 begins.
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09/06/2026, 09:45
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Prof. Mike Lockwood (Reading U., UK)09/06/2026, 10:00Keynote
The development of our understanding of long-term change in the magnetic field of the inner heliosphere will be reviewed. The basic technique is to use modern understanding from space age observations and numerical models, with available proxy indicators, such as historic observations of sunspots, geomagnetic activity, aurorae, eclipses, polar faculae, and polar crown filaments. In addition,...
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Prof. Dibyendu Nandi (IISER, IN)09/06/2026, 10:30Invited review
Decadal-scale and longer-term variations in space environmental conditions forces planetary systems such as the Earth. These variations in radiation, particle and magnetic flux, and occasion extreme events, have a profound influence on planets, including but not limited to atmospheric evolution, climate dynamics, and technological impacts. Studies from the Sun-Earth system indicate that the...
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Dr Alexandre Lemerle (Université de Montréal, CA)09/06/2026, 10:50Solicited
The predominant magnetic backreaction channel through which the growth of solar/stellar dynamos is stabilized has not yet been identified with confidence. In this work, we investigate the dynamical feedback on differential rotation directly driven by the Lorentz force associated with the cycling large-scale magnetic field, in an otherwise kinematic dynamo model where the Babcock-Leighton...
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Prof. Antonio Ferriz-Mas (University of Vigo and IAA-CSIC, ES)09/06/2026, 11:10
The study of cosmogenic radionuclides shows that an event of significantly reduced solar activity such as the Maunder Minimum (1645-1715) was not an exceptional event, but is a recurring phenomenon in the history of solar magnetic activity.
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Although various ideas have been proposed to try to explain why Grand Minima occur, there is no satisfactory model yet.
Since the decade of 1980 many... -
Mr Michele Berretti (Rome Tor Vergata U., IT)09/06/2026, 11:22
Small-scale magnetic elements are ubiquitous in the solar photosphere, covering significant portions of the Sun’s visible surface and organizing into the so-called magnetic network. Advected and jostled by the turbulent plasma in which they are embedded, these elements constitute an ideal proxy to study the superficial flows of the Sun’s convective envelope. Furthermore, they act as a prime...
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Prof. Hisashi Hayakawa (Nagoya U., JP)09/06/2026, 11:34
Some of the participants might be preparing scientific measurements, experiments, or campaigns for the total solar eclipses this August or/and next August. We have good reason for such campaigns, as total solar eclipses have been not only astronomical spectacles but also astrophysical laboratories throughout human history. These astronomical spectacles serve as spot references for the...
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Alexander Shapiro (University of Graz, AT)09/06/2026, 11:46
We constructed a comprehensive sample of solar-like stars by combining Kepler, Gaia, and LAMOST data, selecting stars with near-solar fundamental parameters and measured rotation periods. The rotation periods were determined using a method specifically designed to recover signals from relatively old and weakly active stars.
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We find that the majority of solar-like stars exhibit photometric... -
Frank Stefani (Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, D-01328 Dresden, Germany)09/06/2026, 12:00Poster
We present a solar dynamo model that appears capable of explaining various periodicities across a wide range of timescales in a self-consistent manner [1]. Starting with Rieger-type periodicities, we demonstrate that the two-planet spring tides of Venus, Earth, and Jupiter can excite magneto-Rossby waves in the solar tachocline. These waves have typical periods ranging from 100 to 300 days,...
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Laurie Lamy-Proulx (Université de Montréal, Montréal, Canada)09/06/2026, 12:01Poster
The magnetohydrodynamic dynamo effect, which governs the interactions between internal solar fluid flows and magnetic fields, drives the Sun’s 11-year activity cycle. The meridional circulation, a key aspect of this process, plays a crucial role in regulating the solar cycle and its large-scale magnetic field, particularly within the framework of flux transport dynamo models. However, the deep...
Go to contribution page -
Zebin Zhang (Institute of Frontier and Interdisciplinary Science and Institute of Space Sciences, Shandong University, People's Republic of China)09/06/2026, 12:02Poster
As the solar magnetic cycle evolves, subsurface toroidal magnetic flux is systematically generated and lost, and this work aims to identify the dominant process behind the flux loss. By employing a data-driven dynamo model and holding surface magnetic flux transport identical across the cycles 12-21, we conducted numerical experiments to isolate and assess the loss of subsurface toroidal flux,...
Go to contribution page -
Emilia Rintamäki (Department of Physics, University of Helsinki)09/06/2026, 12:03Poster
Stellar magnetic activity causes different observable phenomena on a stellar surface from dark spots to bright and explosive events, such as flares and coronal mass ejections. Both flares and starspots induce variations in stellar brightness, which can be seen in light curves. Starspots and stellar rotation together produce periodic dimmings of a star, whereas flares cause sudden and irregular...
Go to contribution page -
Serena Criscuoli (NSO, US)09/06/2026, 12:04Poster
Circumfacular regions are dark structures surrounding active regions that appear in chromospheric observations, yet their physical properties and role in solar variability remain poorly constrained. Using ChroTel synoptic observations in Hα and Ca II K spanning the maximum of solar cycle 24 to the onset of cycle 25, we derive the photometric and geometric properties of circumfacular regions...
Go to contribution page -
Jin Qi (National Satellite Meteorological Center, China)09/06/2026, 12:05Poster
Solar irradiance observation is one of main objectives of Fengyun-3 (FY-3) series since the launch of first satellite FY-3A in 2008. For total solar irradiance (TSI), there are six satellites with the payload named Solar Irradiance Monitor (SIM) to perform operational observation. The performance of the instrument is gradually improving at the step of SIM-I, SIM-II and SIM-III. The SIM-III is...
Go to contribution page -
Theodosios Chatzistergos (Max Planck Institute for Solar System Research, DE)09/06/2026, 12:06Poster
Solar irradiance is one of the key external forcing agents of Earth’s climate. Quantifying the effect of its variability requires knowledge of past irradiance changes over as long timescales as possible. Since direct space-based measurements are available for less than half a century, this necessitates irradiance reconstructions using models. On climate-relevant timescales, irradiance...
Go to contribution page -
Kalugodu Chandrashekhar (Royal Observatory of Belgium, Solar Influences Data analysis Center (SIDC), Brussels, Belgium)09/06/2026, 12:07Poster
The International Sunspot Number (SN V2.0) is one of the longest and most detailed available series in astrophysics and its accuracy and stability is important for a large variety of scientific domains, not the least of which is the evolution of the Earth Climate.
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Since its recalibration and release in 2015, SN V2.0 has been the subject of sustained scrutiny within the scientific community... -
Bradley E. Schaefer (Louisiana State University)09/06/2026, 12:08Poster
For consistent measures of solar activity over many cycles, the only possibility is the long historical record of sunspot counts made by human eyes looking through a telescope. For this we have records going back four centuries, but there are substantial problems with consistent calibration across many cycles. An independent data source is the large number of sunspot counts collected by the...
Go to contribution page -
Sabrina Bechet (ROB)09/06/2026, 12:09Poster
Sunspot drawings are a unique source of information to study the long-term manifestation of the magnetic activity on the solar surface. The Royal Observatory of Belgium (ROB) started such drawings around 1940 and continues today on a daily basis, making the whole collection spanning over more than 80 years.
Go to contribution page
In this presentation, we discuss two important limitations to the full scientific... -
Florian Mekhaldi (Stockholm U., SE)09/06/2026, 12:10Poster
Constraining the magnitude and occurrence of extreme solar energetic particle (SEP) events beyond the instrumental era remains central to space climate research and risk assessment. Cosmogenic radionuclides archived in polar ice cores, particularly beryllium-$^{10}$ ($^{10}$Be) and chlorine-$^{36}$ ($^{36}$Cl), provide one of the few direct observational windows into past solar activity. Here...
Go to contribution page -
Prof. Ala Aldahan (Department of Geosciences, United Arab Emirates University, Al Ain, United Arab Emirates)09/06/2026, 12:11Poster
Cosmogenic 10Be records from ice cores are important proxies for reconstructing past solar activity. However, the incorporation of the isotope signal in ice is influenced by atmospheric transport and position processes, which can complicate the interpretation of the signal. Combining data from multiple sites may help reduce such noise and enhance the robustness of 10Be-based solar activity...
Go to contribution page -
Michael W. Dee (Centre for Isotope Research, ESRIG, University of Groningen, Groningen 9747 AG, the Netherlands)09/06/2026, 12:12Poster
Several globally synchronous spikes in radiocarbon production have now been detected in known-age tree-ring archives. Such occurrences, commonly known a Miyake events, must have been prompted by enormous bursts of cosmic radiation. Extreme storms on the Sun are widely believed to be the ultimate source of this radiation. Indeed, the phenomena are expected to be akin to scaled-up versions of...
Go to contribution page -
Dr Shipra Sinha (Oulu U., FI)09/06/2026, 12:13Poster
Understanding how Earth’s magnetosphere responds to large-scale variations in the geomagnetic field is essential for constraining long-term space climate and radiation exposure. While the present-day magnetosphere is well characterized under a dipole-dominated field, its configuration during geomagnetic excursions and reversals (GER) remains poorly understood. We investigate solar...
Go to contribution page -
Giorgio Bergamin (Turin U., IT)09/06/2026, 12:14Poster
In the context of the study of the conditions of the Earth's magnetosphere and space weather, we present the magnetometer installed at the INAF-Turin Astrophysical Observatory (Italy), included in the SWELTO (Space Weather Laboratory of Turin) project. A fluxgate magnetometer, after testing and calibration, has been positioned in the Turin Observatory (45°02'27"N, 7°45'48"E), and in November...
Go to contribution page -
David Pelosi (Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Italy and INFN - Sezione di Perugia, Italy)09/06/2026, 12:15Poster
Investigating the relationship between galactic cosmic rays (GCRs) and solar activity is fundamental for understanding the physical mechanisms that govern particle transport in the heliosphere. Using multi-channel GCR flux data and solar activity proxies, previous studies have employed cross-correlation techniques, wavelet-coherence analyses, and information-theory- based methods, often...
Go to contribution page -
Fernando Monterde-Andrade (Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico and Institute for Space-Earth Environmental Research, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan)09/06/2026, 12:16Poster
The Scibar Cosmic-Ray Telescope (SciCRT) is the most promising detector of the Sierra Negra Cosmic Rays Observatory (SN-CRO). At this location, being a target and a tracker of secondary cosmic rays (SCR), the SciCRT offers a high probability of observing solar energetic particles and lower energy galactic cosmic rays (LEGCR); also, it allows the identification of incoming particles by...
Go to contribution page -
Anderson Campos Fauth (University of Campinas-UNICAMP, Brazil)09/06/2026, 12:17Poster
This study reports the detection of a major Forbush Decrease recorded on 20 January 2026 by the Tanca detector. Tanca is a ground-level water-Cherenkov detector located at the University of Campinas and operates as part of the Latin American Giant Observatory. The instrument consists of a polyethylene cylinder containing 11,400 litres of ultra-pure water, equipped with three photomultiplier...
Go to contribution page -
Mr Markus Similä (Oulu U., FI)09/06/2026, 12:18Poster
Galactic cosmic rays (GCRs) exhibit a small anisotropy around Earth, which presents as diurnal variation (DV) in the count rates of ground-based neutron monitors (NMs). This fluctuation has a typical amplitude of around 0.3 %. Although the properties of DV have been extensively studied, previous literature still lacks a generalized DV model. Such a model could be used, for example, to separate...
Go to contribution page -
Mr Bertalan Csapo (Oulu U., FI)09/06/2026, 12:19Poster
High-energy solar particles entering the Earth’s atmosphere can significantly increase radiation exposure at flight altitudes, especially during Ground Level Enhancement (GLE) events. The aim of this work is to investigate aviation radiation exposure during the GLE#76 event on 21 November 2024, with a focus on estimating effective dose at aviation altitude. During the calculations, the...
Go to contribution page -
Oscar Batalla (Department of Physics, University of Turin, Italy)09/06/2026, 12:20Poster
When solar energetic particle (SEP) events are observed at the ground by at least two sea- level neutron monitors (NMs) at different locations, they are called Ground Level Enhancements (GLEs). Very rarely, SEP-associated increases are observed exclusively at polar high-altitude NMs, which are the most sensitive NMs on Earth due to their reduced geomagnetic and atmospheric shielding. These...
Go to contribution page -
Emilia Kilpua (University of Helsinki, Finland)09/06/2026, 12:21Poster
Coronal mass ejections (CMEs) are the primary drivers of the strongest magnetospheric disturbances at Earth and other planets. The driving ejecta, often exhibiting flux rope signatures, carries the most sustained and intense magnetic fields. However, the sheath preceding a fast CME can also drive major disturbances, particularly at higher altitudes and in the radiation environment, due to its...
Go to contribution page -
Juan José Curto Subirats (Observatori de l’Ebre, ES)09/06/2026, 12:22Poster
In this presentation we want to update on the progress made since the release of the EPOS data portal in 2023.
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Research in the geomagnetic and electromagnetic geophysics community have long benefitted from open international exchange of knowledge. Open access to data, models and codes has become increasingly important in a landscape of multi-disciplinary research questions to support societal... -
Louis Foujols (ISAE-SUPAERO, Toulouse, France and German Aerospace Center (DLR), Earth Observation Center (EOC), Weßling, Germany)09/06/2026, 12:23Poster
As modern urban studies leverage high-cadence Earth Observation (EO) data for Smart Cities applications, the radiometric consistency of satellite imagery becomes a critical factor for automated analysis. However, solar activity cycles and long-term space climate variability significantly affect the ionosphere and upper atmosphere. These fluctuations introduce noise and geometric distortions...
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Jani Mantere (Oulu U., FI)09/06/2026, 12:24Poster
The long observational record of POES satellites (1979 to present) is often used to estimate the EEP and study its long-term evolution and atmospheric impacts. The unique POES record has been the basis for the CMIP6 and CMIP7 versions of the EEP forcing recommended as an input to chemistry-climate models. While the POES measurements provide a long and nearly continuous data series they suffer,...
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Neethal Thomas (Oulu U., FI)09/06/2026, 12:25Poster
In polar latitudes, energetic electron precipitation (EEP; energies ~10s of keV to a few MeV) originating from the radiation belts and plasma sheet has a significant impact on the neutral composition and chemistry of the atmosphere in the mesosphere–lower thermosphere (∼60– 120 km) region. Precipitating electrons greatly disturb the atmospheric concentrations of odd nitrogen (NOx) and odd...
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Lucaferri Lorenza (University of Rome Tor Vergata)09/06/2026, 12:26Poster
Despite solar radiation being the primary external energy source driving the Earth’s climate system, the climatic impact of its long- term variations – such as prolonged periods of low solar activity called Grand Minima – still remains debatable due to the wide spread in solar irradiance reconstructions. Given the large implica- tions for detection and attribution studies, particularly to...
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Hana Hanzlíková (Institute of Atmospheric Physics, Czech Academy of Sciences, Praha, Czechia)09/06/2026, 12:27Poster
There is growing evidence that solar variability associated with the 11-year sunspot cycle, particularly during solar minima and maxima, influences the troposphere. Numerous observational and modelling studies have linked the solar cycle to winter weather and climate variability in the Euro-Atlantic region. However, the strength of these links remains debated, owing to their reduced stability...
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Veera Juntunen (University of Oulu, Finland)09/06/2026, 12:28Poster
In wintertime, the stratospheric polar vortex strongly influences European weather, affecting temperature, wind speed, and cloudiness. A strong polar vortex is typically associated with milder, windier, and cloudier conditions in northern Europe, while colder, calmer, and clearer weather prevails in southern Europe. Cloudiness directly controls the amount of solar radiation reaching the...
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Wojciech J. Miloch (Department of Physics, University of Oslo, Oslo, Norway)09/06/2026, 12:29Poster
Instabilities and turbulence in the Earth ionosphere can lead to irregularities in the ionospheric plasma density. Ionospheric plasma irregularities are important space weather effects, which can significantly impact the propagation of radio waves through the upper atmosphere, and consequently degrade the quality of trans- ionospheric signals and communication with satellites. This can...
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Dr Adam Finley (ESA, NL)09/06/2026, 14:00Invited review
The magnetic activity of stars like the Sun is driven by the interplay of rotation and convection that fuels dynamo-action in their interiors. At the surface, dynamo-generated magnetic fields emerge as "spots" or active regions that influence the circumstellar environment via winds, radiation, and transient events like flares and coronal mass ejections (collectively “space weather”). Flux...
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Dr Laure Lefevre (Royal Observatory of Belgium, BE)09/06/2026, 14:20Solicited
The Sunspot Number series, with its almost 420 years of data, is one of the longest and most detailed available series in astrophysics, it is produced and maintained at the World Data Center SILSO (https://sidc.be/SILSO/home). Since 2010, eJorts have been undertaken by the solar community to revise both the Sunspot Number and the Group Number series (SN and GN). After an extensive...
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Dr Alexei Pevtsov (US National Solar Observatory, US)09/06/2026, 14:40
This work continues revisiting the manual observations of magnetic fields in sunspots from 1917-2025. Observations from Mount Wilson Observatory, Potsdam, and Crimean Astrophysical Observatory are included. We review the methods of observations, describe observational setups, compare measurements, and discuss systematics. While we see a solar cycle variation in the amplitude of strongest...
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Dr Marianna Korsos (University of Sheffield, UK)09/06/2026, 14:52
We investigate the large-scale longitudinal and hemispheric organization of solar magnetic activity across multiple solar cycles, including Cycles 23, 24, and the ongoing Cycle 25. Using synoptic magnetic maps and flare catalogues, we examine the relationship between active longitudes, the spatial distribution of magnetically complex active regions, and the preferred longitudes of the most...
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Prof. Eckhard Weisshaar (U. of Applied Sciences, Wiesbaden, DE)09/06/2026, 15:04Solicited
$^{14}$C measurements from tree rings have been used by Usoskin et al. (2021, 2025, 2026) to reconstruct past solar activity cycles over three millenia from the year 1000 BCE onward. In Weisshaar et al. (2023, A&A 671, A87) we analysed a first data set covering the epochs of reconstructed activity minima and maxima of the reconstructed cycles between 971 and 1900 CE in order to determine...
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Dr Ismo Tähtinen (Oulu U., FI)09/06/2026, 15:19
We present a novel method for quantifying the eect that individual active regions have on the large-scale solar magnetic field as their magnetic flux spreads across the photosphere. This is achieved by combining the surface flux transport (SFT) model with a recent vector sum method.
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We simulated the evolution of individual active regions of solar cycle 24 with the SFT model and used the... -
Prof. Lisa Upton (Southwest Research Institute, US)09/06/2026, 16:08Keynote
Observations of photospheric magnetic fields, active region emergence, and surface flows provide the primary constraints on predicting solar cycle variability. In particular, the strength of the polar fields during solar minimum remains a robust indicator of the amplitude of the subsequent cycle. However, reliable polar field measurements are only available for a few decades and key aspects of...
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Frank Stefani (Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, D-01328 Dresden, Germany)09/06/2026, 16:38Poster
We present a solar dynamo model that appears capable of explaining various periodicities across a wide range of timescales in a self-consistent manner [1]. Starting with Rieger-type periodicities, we demonstrate that the two-planet spring tides of Venus, Earth, and Jupiter can excite magneto-Rossby waves in the solar tachocline. These waves have typical periods ranging from 100 to 300 days,...
Go to contribution page -
Laurie Lamy-Proulx (Université de Montréal, Montréal, Canada)09/06/2026, 16:39Poster
The magnetohydrodynamic dynamo effect, which governs the interactions between internal solar fluid flows and magnetic fields, drives the Sun’s 11-year activity cycle. The meridional circulation, a key aspect of this process, plays a crucial role in regulating the solar cycle and its large-scale magnetic field, particularly within the framework of flux transport dynamo models. However, the deep...
Go to contribution page -
Zebin Zhang (Institute of Frontier and Interdisciplinary Science and Institute of Space Sciences, Shandong University, People's Republic of China)09/06/2026, 16:40Poster
As the solar magnetic cycle evolves, subsurface toroidal magnetic flux is systematically generated and lost, and this work aims to identify the dominant process behind the flux loss. By employing a data-driven dynamo model and holding surface magnetic flux transport identical across the cycles 12-21, we conducted numerical experiments to isolate and assess the loss of subsurface toroidal flux,...
Go to contribution page -
Emilia Rintamäki (Department of Physics, University of Helsinki)09/06/2026, 16:41Poster
Stellar magnetic activity causes different observable phenomena on a stellar surface from dark spots to bright and explosive events, such as flares and coronal mass ejections. Both flares and starspots induce variations in stellar brightness, which can be seen in light curves. Starspots and stellar rotation together produce periodic dimmings of a star, whereas flares cause sudden and irregular...
Go to contribution page -
Criscuoli Serena (NSO, US)09/06/2026, 16:42Poster
Circumfacular regions are dark structures surrounding active regions that appear in chromospheric observations, yet their physical properties and role in solar variability remain poorly constrained. Using ChroTel synoptic observations in Hα and Ca II K spanning the maximum of solar cycle 24 to the onset of cycle 25, we derive the photometric and geometric properties of circumfacular regions...
Go to contribution page -
Jin Qi (National Satellite Meteorological Center, China)09/06/2026, 16:43Poster
Solar irradiance observation is one of main objectives of Fengyun-3 (FY-3) series since the launch of first satellite FY-3A in 2008. For total solar irradiance (TSI), there are six satellites with the payload named Solar Irradiance Monitor (SIM) to perform operational observation. The performance of the instrument is gradually improving at the step of SIM-I, SIM-II and SIM-III. The SIM-III is...
Go to contribution page -
Theodosios Chatzistergos (Max Planck Institute for Solar System Research, DE)09/06/2026, 16:44Poster
Solar irradiance is one of the key external forcing agents of Earth’s climate. Quantifying the effect of its variability requires knowledge of past irradiance changes over as long timescales as possible. Since direct space-based measurements are available for less than half a century, this necessitates irradiance reconstructions using models. On climate-relevant timescales, irradiance...
Go to contribution page -
Kalugodu Chandrashekhar (Royal Observatory of Belgium, Solar Influences Data analysis Center (SIDC), Brussels, Belgium)09/06/2026, 16:45Poster
The International Sunspot Number (SN V2.0) is one of the longest and most detailed available series in astrophysics and its accuracy and stability is important for a large variety of scientific domains, not the least of which is the evolution of the Earth Climate.
Go to contribution page
Since its recalibration and release in 2015, SN V2.0 has been the subject of sustained scrutiny within the scientific community... -
Bradley E. Schaefer (Louisiana State University)09/06/2026, 16:46Poster
For consistent measures of solar activity over many cycles, the only possibility is the long historical record of sunspot counts made by human eyes looking through a telescope. For this we have records going back four centuries, but there are substantial problems with consistent calibration across many cycles. An independent data source is the large number of sunspot counts collected by the...
Go to contribution page -
Sabrina Bechet (ROB)09/06/2026, 16:47Poster
Sunspot drawings are a unique source of information to study the long-term manifestation of the magnetic activity on the solar surface. The Royal Observatory of Belgium (ROB) started such drawings around 1940 and continues today on a daily basis, making the whole collection spanning over more than 80 years.
Go to contribution page
In this presentation, we discuss two important limitations to the full scientific... -
Florian Mekhaldi (Stockholm U., SE)09/06/2026, 16:48Poster
Constraining the magnitude and occurrence of extreme solar energetic particle (SEP) events beyond the instrumental era remains central to space climate research and risk assessment. Cosmogenic radionuclides archived in polar ice cores, particularly beryllium-$^{10}$ ($^{10}$Be) and chlorine-$^{36}$ ($^{36}$Cl), provide one of the few direct observational windows into past solar activity. Here...
Go to contribution page -
Prof. Ala Aldahan (Department of Geosciences, United Arab Emirates University, Al Ain, United Arab Emirates)09/06/2026, 16:49Poster
Cosmogenic 10Be records from ice cores are important proxies for reconstructing past solar activity. However, the incorporation of the isotope signal in ice is influenced by atmospheric transport and position processes, which can complicate the interpretation of the signal. Combining data from multiple sites may help reduce such noise and enhance the robustness of 10Be-based solar activity...
Go to contribution page -
Michael W. Dee (Centre for Isotope Research, ESRIG, University of Groningen, Groningen 9747 AG, the Netherlands)09/06/2026, 16:50Poster
Several globally synchronous spikes in radiocarbon production have now been detected in known-age tree-ring archives. Such occurrences, commonly known a Miyake events, must have been prompted by enormous bursts of cosmic radiation. Extreme storms on the Sun are widely believed to be the ultimate source of this radiation. Indeed, the phenomena are expected to be akin to scaled-up versions of...
Go to contribution page -
Dr Shipra Sinha (Oulu U., FI)09/06/2026, 16:51Poster
Understanding how Earth’s magnetosphere responds to large-scale variations in the geomagnetic field is essential for constraining long-term space climate and radiation exposure. While the present-day magnetosphere is well characterized under a dipole-dominated field, its configuration during geomagnetic excursions and reversals (GER) remains poorly understood. We investigate solar...
Go to contribution page -
Giorgio Bergamin (INAF OATo)09/06/2026, 16:52Poster
In the context of the study of the conditions of the Earth's magnetosphere and space weather, we present the magnetometer installed at the INAF-Turin Astrophysical Observatory (Italy), included in the SWELTO (Space Weather Laboratory of Turin) project. A fluxgate magnetometer, after testing and calibration, has been positioned in the Turin Observatory (45°02'27"N, 7°45'48"E), and in November...
Go to contribution page -
David Pelosi (Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Italy and INFN - Sezione di Perugia, Italy)09/06/2026, 16:54Poster
Investigating the relationship between galactic cosmic rays (GCRs) and solar activity is fundamental for understanding the physical mechanisms that govern particle transport in the heliosphere. Using multi-channel GCR flux data and solar activity proxies, previous studies have employed cross-correlation techniques, wavelet-coherence analyses, and information-theory- based methods, often...
Go to contribution page -
Fernando Monterde-Andrade (Instituto de Geofísica, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico and Institute for Space-Earth Environmental Research, Nagoya University, Chikusa, Nagoya, Aichi 464-8601, Japan)09/06/2026, 16:55Poster
The Scibar Cosmic-Ray Telescope (SciCRT) is the most promising detector of the Sierra Negra Cosmic Rays Observatory (SN-CRO). At this location, being a target and a tracker of secondary cosmic rays (SCR), the SciCRT offers a high probability of observing solar energetic particles and lower energy galactic cosmic rays (LEGCR); also, it allows the identification of incoming particles by...
Go to contribution page -
Anderson Campos Fauth (University of Campinas-UNICAMP, Brazil)09/06/2026, 16:56Poster
This study reports the detection of a major Forbush Decrease recorded on 20 January 2026 by the Tanca detector. Tanca is a ground-level water-Cherenkov detector located at the University of Campinas and operates as part of the Latin American Giant Observatory. The instrument consists of a polyethylene cylinder containing 11,400 litres of ultra-pure water, equipped with three photomultiplier...
Go to contribution page -
Mr Markus Similä (Oulu U., FI)09/06/2026, 16:57Poster
Galactic cosmic rays (GCRs) exhibit a small anisotropy around Earth, which presents as diurnal variation (DV) in the count rates of ground-based neutron monitors (NMs). This fluctuation has a typical amplitude of around 0.3 %. Although the properties of DV have been extensively studied, previous literature still lacks a generalized DV model. Such a model could be used, for example, to separate...
Go to contribution page -
Mr Bertalan Csapo (Oulu U., FI)09/06/2026, 16:58Poster
High-energy solar particles entering the Earth’s atmosphere can significantly increase radiation exposure at flight altitudes, especially during Ground Level Enhancement (GLE) events. The aim of this work is to investigate aviation radiation exposure during the GLE#76 event on 21 November 2024, with a focus on estimating effective dose at aviation altitude. During the calculations, the...
Go to contribution page -
Oscar Batalla (Department of Physics, University of Turin, Italy)09/06/2026, 16:59Poster
When solar energetic particle (SEP) events are observed at the ground by at least two sea- level neutron monitors (NMs) at different locations, they are called Ground Level Enhancements (GLEs). Very rarely, SEP-associated increases are observed exclusively at polar high-altitude NMs, which are the most sensitive NMs on Earth due to their reduced geomagnetic and atmospheric shielding. These...
Go to contribution page -
Emilia Kilpua (University of Helsinki, Finland)09/06/2026, 17:00Poster
Coronal mass ejections (CMEs) are the primary drivers of the strongest magnetospheric disturbances at Earth and other planets. The driving ejecta, often exhibiting flux rope signatures, carries the most sustained and intense magnetic fields. However, the sheath preceding a fast CME can also drive major disturbances, particularly at higher altitudes and in the radiation environment, due to its...
Go to contribution page -
Juan José Curto Subirats (Observatori de l’Ebre, ES)09/06/2026, 17:01Poster
In this presentation we want to update on the progress made since the release of the EPOS data portal in 2023.
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Research in the geomagnetic and electromagnetic geophysics community have long benefitted from open international exchange of knowledge. Open access to data, models and codes has become increasingly important in a landscape of multi-disciplinary research questions to support societal... -
Louis Foujols (ISAE-SUPAERO, Toulouse, France and German Aerospace Center (DLR), Earth Observation Center (EOC), Weßling, Germany)09/06/2026, 17:02Poster
As modern urban studies leverage high-cadence Earth Observation (EO) data for Smart Cities applications, the radiometric consistency of satellite imagery becomes a critical factor for automated analysis. However, solar activity cycles and long-term space climate variability significantly affect the ionosphere and upper atmosphere. These fluctuations introduce noise and geometric distortions...
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Jani Mantere (Oulu U., FI)09/06/2026, 17:03Poster
The long observational record of POES satellites (1979 to present) is often used to estimate the EEP and study its long-term evolution and atmospheric impacts. The unique POES record has been the basis for the CMIP6 and CMIP7 versions of the EEP forcing recommended as an input to chemistry-climate models. While the POES measurements provide a long and nearly continuous data series they suffer,...
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Neethal Thomas (Oulu U., FI)09/06/2026, 17:04Poster
In polar latitudes, energetic electron precipitation (EEP; energies ~10s of keV to a few MeV) originating from the radiation belts and plasma sheet has a significant impact on the neutral composition and chemistry of the atmosphere in the mesosphere–lower thermosphere (∼60– 120 km) region. Precipitating electrons greatly disturb the atmospheric concentrations of odd nitrogen (NOx) and odd...
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Lucaferri Lorenza (University of Rome Tor Vergata)09/06/2026, 17:05Poster
Despite solar radiation being the primary external energy source driving the Earth’s climate system, the climatic impact of its long- term variations – such as prolonged periods of low solar activity called Grand Minima – still remains debatable due to the wide spread in solar irradiance reconstructions. Given the large implica- tions for detection and attribution studies, particularly to...
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Hana Hanzlíková (Institute of Atmospheric Physics, Czech Academy of Sciences, Praha, Czechia)09/06/2026, 17:06Poster
There is growing evidence that solar variability associated with the 11-year sunspot cycle, particularly during solar minima and maxima, influences the troposphere. Numerous observational and modelling studies have linked the solar cycle to winter weather and climate variability in the Euro-Atlantic region. However, the strength of these links remains debated, owing to their reduced stability...
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Veera Juntunen (University of Oulu, Finland)09/06/2026, 17:07Poster
In wintertime, the stratospheric polar vortex strongly influences European weather, affecting temperature, wind speed, and cloudiness. A strong polar vortex is typically associated with milder, windier, and cloudier conditions in northern Europe, while colder, calmer, and clearer weather prevails in southern Europe. Cloudiness directly controls the amount of solar radiation reaching the...
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Wojciech J. Miloch (Department of Physics, University of Oslo, Oslo, Norway)09/06/2026, 17:08Poster
Instabilities and turbulence in the Earth ionosphere can lead to irregularities in the ionospheric plasma density. Ionospheric plasma irregularities are important space weather effects, which can significantly impact the propagation of radio waves through the upper atmosphere, and consequently degrade the quality of trans- ionospheric signals and communication with satellites. This can...
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Francesco Berrilli (Rome Tor Vergata U., IT)10/06/2026, 09:20Invited review
Solar irradiance is the fundamental energy source powering the Earth system, and its variability over time is a critical factor in understanding climate dynamics. While Total Solar Irradiance (TSI) represents the overall energy output, it is the wavelength-dependent variability of Spectral Solar Irradiance (SSI), especially in the ultraviolet, that most directly influences atmospheric...
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Theodosios Chatzistergos (Max Planck Institute for Solar System Research, DE)10/06/2026, 09:40
The Sun is the primary external energy source for Earth, making reliable long-term records of solar irradiance essential. Measurements of total solar irradiance (TSI) have been available since 1978, although they originate from multiple relatively short-lived space-based missions that exhibit marked differences. Combining these observations into a consistent long-term record is therefore...
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Greg Kopp (Colorado U., US)10/06/2026, 10:00
I have updated the total solar irradiance (TSI) data from all three spaceflight Total Irradiance Monitors (TIMs) within the last year, improving the accuracies and stabilities of the SORCE, TCTE, and TSIS-1 TIM measurements. These are expected to be the final data versions for the SORCE and TCTE instruments, both of which have been decommissioned, having been replaced by the continuing...
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Duresa Temaj (Max Planck Institute for Solar System Research, DE)10/06/2026, 10:12
Space-based measurements of solar irradiance since 1978 have revealed variability across all observable timescales. However, this record is too short to assess the Sun’s role in climate variability, making long-term irradiance reconstructions essential. From days to millennia, irradiance variability is dominated by changes in surface magnetism through the competing effects of sunspot darkening...
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Kalevi Mursula (Oulu U., FI)10/06/2026, 10:24
Sunspots offer a uniquely long view of solar magnetic activity, and depict large variability during the last 100 years, a period known as the Modern Maximum (MM). However, since weaker magnetic elements dominate solar surface magnetism, our view of solar magnetic variability would be incomplete if it was only based on the strongest magnetic fields of sunspots. Luckily, there are several...
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Mykola Gordovskyy (U. of Hertfordshire, UK)10/06/2026, 11:00
High energy ions and electrons play a crucial role in the fast energy transport in solar flares. A fraction of the particles accelerated in flares precipitate in the solar atmosphere, heating the corona and chromosphere, and producing non-thermal gamma-, X-ray and radio emissions. Others escape from the corona into the heliosphere. The escaping energetic particles are an important component of...
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José Manuel Vaquero (Universidad de Extremadura, ES)10/06/2026, 11:20
Recovering historical solar and geomagnetic observations is essential for extending the temporal baseline of Space Climate research. A significant amount of valuable material remains scattered across solitary archives or published in sources that are largely inaccessible to the research community. In this contribution, we present recent progress in identifying, analyzing, and contextualizing...
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Nariaki Nitta (Lockheed Martin Solar and Astrophysics Laboratory, US)10/06/2026, 11:32
We present a preliminary analysis of two recent periods of quasi-extreme space weather driven by strong interplanetary (IP) shocks. In November 2025, four fast CMEs occurred within five days, each associated with an X-class flare. Although the third event had the highest soft X- ray peak flux and CME speed, giving rise to a ground level enhancement (GLE) event, it was the shock wave from the...
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Dmitrijs Bezrukovs (VIRAC, LV)10/06/2026, 11:44
Known that spectral observations of microwave (1-10 cm) polarized emission of the Sun offer the possibility for direct measurements of plasma parameters and magnetic field inductions in the upper chromosphere and the lower corona at the range of heights above the photosphere. Thus current microwave observations of the Sun could be expected for studies of wide range of solar physics problems...
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Sowmya Krishnamurthy (University of Graz, AT)10/06/2026, 11:56
All stars with an outer convection zone are magnetically active at some level, with the amount of activity depending on stellar parameters, e.g. the effective temperature and the rotation rate. By far the best studied such star is the Sun. While investigating other stars allows studying stellar activity across a broad range of stellar properties, the Sun provides us with the unique opportunity...
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Veronika Witzke (University of Graz, AT)10/06/2026, 12:16
Stellar magnetic activity, manifested in spots, faculae, and brightness variability, depends sensitively on fundamental parameters such as stellar mass, age, rotation, and metallicity. Understanding how these factors shape active regions is essential not only for interpreting other stars, but also for placing the Sun into its proper stellar context.
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Three-dimensional radiative... -
Sowmya Krishnamurthy (University of Graz, AT)10/06/2026, 12:36
Granulation is a fundamental manifestation of near-surface convection in cool main- sequence stars and plays a central role in regulating photospheric structure, spectral variability, and radiative output. Understanding its imprint on spectral lines is essential for connecting solar observations with unresolved stellar measurements and for improving models of stellar surface convection.
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In... -
Merav Opher (Boston University, US)10/06/2026, 12:48
In its travel through the Milky Way, the Sun traverses a variety of Galactic environments, including dense interstellar clouds. Astronomical effects on Earth’s past climate have been limited to 10,000-year scales variations in Earth’s orbital parameters while our recent studies suggest that longer-term climate shifts that occur every few million year may be linked to compression of the...
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10/06/2026, 15:00
1 OPTION: Hiking in Åland/Ahvenanmaa (6 hrs from 15.00, for ages 7 and up only). Start your tour with a coach drive to North of Åland, to Geta Berget. On your way you can admire the big Apple tree gardens and small villages. Arrive to the most Northern part of the main Island where the nature is barren and rocky surrounded by open sea. From here you will start your nature hiking with a guide....
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Roelf Du Toit Strauss (NWU, ZA)11/06/2026, 09:00Invited review
In this talk I’ll give a brief introduction to the physics of cosmic ray modulation in the heliosphere and the time-dependent drivers thereof. The Parker transport equation formalism, used to model solar modulation, will also be introduced, along with a discussion regarding the necessary input parameters. A frequently applied approximation to the Parker transport equation, especially when very...
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Simone Benella (INAF-IAPS, IT)11/06/2026, 09:20
Galactic cosmic rays (GCRs) constitute a continuous flux of high-energy particles, mostly protons and helium nuclei, flowing through the Heliosphere and interacting with solar wind and interplanetary magnetic field. The result of this interaction on long periods of time is the well-known modulation of the low end of the GCR energy spectrum (below a few GeVs), following the 11-year activity...
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Alex Mishev (Oulu U., FI)11/06/2026, 09:40
Methodological study of solar energetic particles (SEPs) gives the basis to reveal their origin, acceleration and also top constrain the models of their propagation in the interplanetary space. It is believed that SEPs are produced following solar eruptive processes, such as solar flares and/or coronal mass ejections. SEPs can be accelerated to approximately 10 GeV/n range, yet the bulk are...
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Stepan Poluianov (Oulu U., FI)11/06/2026, 09:52
The Sun sporadically produces solar energetic particle (SEP) events that can significantly vary in intensity and spectral hardness. Although the majority of such events miss the Earth or are too weak to be registered by ground-based particle detectors, there are rare occurrences when strong SEP events penetrate deep into the atmosphere and can be observed on the ground. The latter ones are...
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Agnieszka Gil-Swiderska (Siedlce U., PL)11/06/2026, 10:04
Using data from the AMS-02 instrument aboard the International Space Station, we examined long- term variations of the galactic cosmic ray (GCR) proton fluxes. This dataset enables a high-resolution study of time profiles and rigidity dependence within a rigidity range of 1 to 100 GV. We investigated the amplitude of long-term GCR variations using a power-law fit across the solar cycle. To...
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Pauli Väisänen (Oulu U., FI)11/06/2026, 10:16
The magnetic activity of the Sun modulates the fluxes of galactic cosmic rays (GCRs) arriving to the heliosphere and Earth. This modulation of GCR can be estimated by a straightforward force-field approach, which reduced the modulation to a single parameter φ with units in megavolts. Even though the physical interpretation of this modulation parameter can be unclear, it can still assess the...
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Nandita Srivastava (Udaipur Solar Observatory, IN)11/06/2026, 10:50Invited review
Our Sun is a dynamic star that produces energetic events known as coronal mass ejections (CMEs). These ejections are driven by the Sun's magnetic fields, which facilitate their movement through the heliosphere. The propagation of CMEs is primarily affected by the ambient solar wind medium, which ultimately influences their arrival time. In general, the magnetic field configurations on the Sun...
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Nada Alhaddad (University of New Hampshire, US)11/06/2026, 11:10
Coronal mass ejections (CMEs) are still modelled as isolated, highly twisted, circular flux ropes, a picture that forms the basis of many reconstruction methods and much of present-day space-weather work but that no longer matches the magnetic complexity revealed by recent data and simulations. In this talk, in situ and multi-spacecraft measurements, remote observations, and numerical...
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John Richardson (MIT, US)11/06/2026, 11:30
The Voyager 1 and 2 spacecraft have traversed the heliosphere and entered the local interstellar medium (LISM). They are 169 AU and 142 AU from the Sun, 48 and 23 AU past the heliopause. These spacecraft have been taking data for over 48 years, more than four solar cycles. Thus they provide an excellent study of long-term time dependence of the solar wind. Solar cycle effects dominate the...
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Noé Lugaz (University of New Hampshire, US)11/06/2026, 11:42
Coronal mass ejections (CMEs) have been measured in situ since the 1970s with missions such as Helios, Voyager, IMP-8, Voyager. Over the past 30 years, we have now gained routine measurements by Wind and ACE at the Sun-Earth L1, in the inner heliosphere by STEREO, and in the innermost heliosphere and corona by Solar Orbiter and Parker Solar Probe. With 1000s of measurements from heliocentric...
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Rajkumar Hajra (USTC, CN)11/06/2026, 11:54Invited review
The May 2024 superstorm (SYM-H peak = –518 nT) was characterized by a three-step main phase, a long and strong recovery phase, and six isolated supersubstorms (SSSs; SML < –2500 nT). The events were associated with multiple interplanetary sheaths and magnetic clouds. In this presentation, we will discuss unique interplanetary phenomena leading to the events, distinguished geomagnetic features,...
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Slava Merkin (JHU APL, US)11/06/2026, 12:14Invited review
Geospace is a complex, interconnected system, where diverse physical domains and particle populations interact across a vast range of spatial and temporal scales. To understand geospace in all of its complexity and enable robust space weather prediction, physics-based models must describe the system holistically, i.e., treat all essential processes and domains, while maintaining sufficiently...
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Elena Marshalko (FMI, FI)11/06/2026, 12:34
Intense geomagnetic storms are typically initiated by fast coronal mass ejections (CMEs) preceded by a sheath region of compressed solar wind. The arrival of the interplanetary shock at the magnetopause produces a sudden storm commencement (SSC), observed as an abrupt, step-like enhancement of the horizontal geomagnetic field. The rapid magnetic field variations associated with SSCs induce...
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Nicolas Brehm (ETH, CH)11/06/2026, 13:45
The Sun is the primary energy source of the Earth system, and variations in solar activity can significantly influence climate. While direct observations of solar activity, such as sunspot records, extend back only about 400 years, cosmogenic radionuclides produced by cosmic rays and preserved in tree rings and ice cores provide valuable proxies for reconstructing solar variability over...
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Jian Wang (University of Groningen, NL)11/06/2026, 14:05
Annual-resolution ¹⁴C records from tree rings have become powerful proxies for detecting extreme solar behaviour, including short-lived cosmic-ray enhancements related to solar energetic particle (SEP) events and variations in solar magnetic activity. A recent study compiling an annually resolved ¹⁴C record from 1–970 CE, based on five new and three existing tree-ring series measured at the...
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Fusa Miyake (Nagoya U., JP)11/06/2026, 14:25
Cosmogenic nuclides used to detect past solar energetic particle (SEP) events are tree-ring $^{14}$C, and ice-core $^{10}$Be, and $^{36}$Cl. These nuclides serve as key proxies for reconstructing SEP events. To date, multiple extreme SEP events, including the 774 CE event, have been identified from these cosmogenic nuclide records. The magnitudes of these events are estimated to be several...
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Sergey Koldobskiy (University of Oulu)11/06/2026, 14:45
Extreme solar particle events (ESPEs) are caused by rare, enormously intense solar eruptions and can produce globally detectable spikes in tree-ring radiocarbon ($^{14}$C), known as Miyake events, which serve as precise chronological tie-points and indicators of extreme solar activity. After production, radiocarbon is subjected to the complex carbon cycle, including large- scale atmospheric...
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Chitradeep Saha (University of Reading, UK)11/06/2026, 14:57
Long-term solar magnetic variability governs the space climate conditions. These variations also modulate the galactic cosmic ray influx reaching Earth and subsequently regulate the production of cosmogenic isotopes in the Earth's atmosphere. By harnessing the multi-millennial records of these radio-isotope proxies archived in various natural terrestrial reservoirs, such as tree rings and ice...
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Joonas Uusitalo (Helsinki U., FI)11/06/2026, 15:09
Rapid increases in atmospheric radiocarbon ($^{14}$C), known as Miyake events, have been identified across multiple time periods, with Solar Proton Events (SPEs) considered the most probable cause. Among these, the ~660 BC event stands out due to its apparently prolonged rise time compared to other confirmed events such as AD 774–775 and AD 993–994, prompting hypotheses ranging from double...
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Irina Panyushkina (University of Arizona, US)11/06/2026, 15:21
Instrumental observations of extreme solar eruptions are short, restricting their linkages to paleoevents (e.g. Miyake events) derived from cosmogenic $^{14}$C, $^{36}$Cl and $^{10}$Be isotopes of ice cores and tree rings. This constrains estimates of their long-term frequency and probability. The strongest solar proton event (SPE) recorded by ground-level enhancement occurred on 23 February...
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Timothy Jull (University of Arizona, US)11/06/2026, 15:33
Rapid spikes observed in the tree-ring $^{14}$C record are caused by extreme solar proton storms or high-energetic particles events. Six of these “Miyake” events have been confirmed with 10Be in ice cores at 774 CE, 993 CE, 664 BCE, 5259 BCE, 7176 BCE, and 12450 BCE. There are also a number of $^{14}$C excursions attributed to solar effects that are not yet confirmed by other cosmogenic...
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Juan José Curto Subirats (Observatori de l’Ebre, ES)11/06/2026, 16:05Invited review
Solar flare effects (Sfe) are rapid variations in the Earth’s magnetic field. They are the response to an enhancement of the amount of radiation during Solar flare events.
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The Carrington’s observations in 1859 related geomagnetic variations with solar radiations. They represented the first direct evidence of the connection between the Sun’s activity and the Earth’s environment. Since then,... -
Jean-Pierre Rozelot (Université Côte d’Azur, FR)11/06/2026, 16:25
Among all the fundamental solar parameters, mass, surface gravity, temperature, luminosity..., all well inventoried for several years in reference books, solar diameter is still a controversial issue, both its true value and any possible temporal variations. The most exact value of the solar diameter is of importance, as it serves as an astronomical standard. Changing its absolute value can,...
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Ilya Usoskin (Oulu U., FI)11/06/2026, 16:45
Solar cyclic activity was discovered in the 19$^\textrm{th}$ century and traced back to 1610 CE through directly observed sunspots. Using indirect cosmogenic proxy data, such as $^{14}$C in tree trunks and $^{10}$Be in ice cores, it is possible to reconstruct long-term solar activity back for several millennia, but individual cycles were not readily resolved. Thanks to the recent breakthrough...
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Alexander Pevtsov (US National Solar Observatory, US)11/06/2026, 16:57
The 21$^\textrm{st}$ century has brought us many new and exciting groundbreaking facilities such as Daniel K. Inouye Solar Telescope (DKIST), Solar Dynamics Observatory (SDO), and Solar Orbiter (SO) with more on the horizon such as Next Generation Ground based Solar Observing Network (ngGONG) and PHOtospheric Magnetograph Imager (PHOMI) for upcoming NOAA SpaceWeather Geostationary (SWGEO)...
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Wenjuan Huo (GEOMAR, DE)11/06/2026, 17:09Invited review
The tropical Pacific variability significantly affects the global weather and climate from annual to interdecadal timescales. The El Niño Southern–Oscillation (ENSO) in this region has a direct association with extreme weather precipitation and climate anomalies across the world. Many studies have been shown that the tropical Pacific has statistically significant responses to the solar...
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Hilde Nesse (University of Bergen, NO)11/06/2026, 17:29
Recent studies have revealed important advances in understanding how the direct effects of energetic electron precipitation (EEP) on mesospheric ozone influence atmospheric dynamics (Zúñiga López et al., 2022). These findings show that EEP can significantly affect mesospheric temperature, wave breaking and refraction, and consequently atmospheric winds and circulation. However, the magnitude...
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Timo Qvick (Oulu U., FI)11/06/2026, 17:49
Most predictions of space climate, that is, the long-term behavior of the solar-terrestrial environment, have focused on forecasting the 11-year sunspot cycle. Geomagnetic activity, on the other hand, has mainly been predicted in shorter, space weather timescales of up to days to weeks. Using a 180-year composite aa index, we aim to predict here the temporal behavior of geomagnetic activity...
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Mikhail Vokhmianin (Oulu U., FI)11/06/2026, 18:01
Space climate affects not only the magnetosphere and ionosphere, but also the middle atmosphere, including the mesosphere (50–80 km) and stratosphere (15–50 km). Variations in solar radiation and precipitating energetic particles (EPP) influence atmospheric composition, particularly ozone, which plays a central role in the atmospheric radiative balance through its absorption of shortwave and...
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11/06/2026, 19:00
Menu 1 (Regular menu + pescatarians + no mushroom diet + gluten and lactose-free):
1. Seared scallops, ratatouille vinaigrette, Arenkha caviar, cauliflower crème and mussel foam with a glass of wine/soft drink
2. Pike perch (AX), browned butter sauce, fennel, cucumber and trout roe with a glass of wine/soft drink
3. Crème Brûlée with fresh berries with coffee/teaMenu 2 (for...
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Dr Oleksiy Agapitov (California Berkeley U., US)12/06/2026, 09:00Invited review
Very Low Frequency (VLF) whistler-mode chorus and hiss emissions are pervasive features of the Earth’s magnetosphere, playing a critical role in controlling the dynamics of the outer Van Allen radiation belt. Through interactions with trapped electrons, these waves drive both upper-atmosphere ionization and the energization of relativistic electrons, posing significant space weather hazards to...
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Dr Dogacan Ozturk (Alaska Fairbanks U., US)12/06/2026, 09:20Solicited
At high-latitude regions on the Earth, auroral displays exhibit strong spatiotemporal variability yet fall into broad morphological classifications. Studies have shown that different types of aurora can exhibit distinct particle precipitation energies and fluxes, convection electric field configurations, and preferential occurrence rates across different levels of geomagnetic activity. The...
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Prof. Eija Tanskanen (FI)12/06/2026, 09:40
The energy from the Sun emitted in a large variety of frequencies is powering the polar areas, but the energy is not distributed evenly over the latitudes. We found out that over 40% of the available energy dissipates to the 2° wide band around 67° CGM when the area between 56-76° CGM is considered. During winter months the largest amount of energy dissipates to a narrower latitudinal range...
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Nicholas Larsen (Nagoya U., JP)12/06/2026, 09:52
he first of a successful line of semi-empirical magnetospheric models was created by Tsyganenko (1989), henceforth referred to as the TSY models. TSY89 captured the structure of the magnetosphere well for low to mid geomagnetic disturbances and was parametrised simply using the planetary Kp index. For this reason, TSY89 is still widely used today when modelling the magnetosphere under similar...
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Achuthan Nair (Oulu U., FI)12/06/2026, 10:04
The solar wind, a stream of charged particles emanating from the Sun, interacts with Earth’s magnetosphere. This interaction creates space weather phenomena such as geomagnetic storms, substorms, and auroras. Space weather is driven by solar wind and the interplanetary magnetic field (IMF) which drive ionospheric electric currents in the Earth’s magnetosphere and ionosphere. It is well-known...
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64. Hemispheric and dawn-dusk asymmetries of Kelvin-Helmholtz waves driven by dipole tilt and IMF ByDr Lauri Holappa (Oulu U., FI)12/06/2026, 10:16
Along with magnetic reconnection, Kelvin-Helmholtz (KH) waves are the main mechanisms controlling the solar wind-magnetosphere interaction. Kelvin-Helmholtz waves have been shown to be important for plasma transport into the magnetosphere, enabled by secondary processes such as reconnection, diffusion and wave-particle interactions. Here we use magnetohydrodynamical (MHD) simulations for...
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Dr Qian Wu (NCAR, US)12/06/2026, 10:28
Multi-year observations of the thermospheric wind are available at many mid latitude locations. NCAR and other institutes have been operating ground based Fabry Perot interferometer for nighttime O 630 nm airglow Doppler remote sensing to monitor thermospheric winds. Thermospheric winds are affected by solar and geomagnetic activities, as well as atmospheric tides from lower atmosphere. Long...
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Prof. Delores Knipp (Colorado Boulder U., US)12/06/2026, 11:10Keynote
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Dr Timofei Sukhodolov (PMOD/WRC, CH)12/06/2026, 11:40
Energetic particle precipitation (EPP) provides an important pathway for space weather to influence the middle and lower atmosphere, yet its role in atmospheric variability and predictability remains uncertain. While EPP-driven production of NOx and subsequent ozone depletion can affect stratospheric dynamics and surface climate, observational constraints are limited: reanalysis products rely...
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67. Energetic particle influence on polar vortex revealed by 300-year long climate model simulationsProf. Timo Asikainen (Oulu U., FI)12/06/2026, 12:00
Many past studies based on climate reanalysis data have strongly indicated that energetic electron precipitation (EEP) from space into the polar atmosphere leads to mesospheric and stratospheric ozone loss. This in turn affects radiative balance in the atmosphere and leads to thermal changes, which enhance the stratospheric polar vortex.
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Here we study the EEP influence on the atmosphere and... -
Prof. Liang Zhao (Institute of Atmospheric Physics, Chinese Academy of Sciences, CN)12/06/2026, 12:12
Solar forcing significantly influences the variability of monsoon patterns. However, the connection between decadal variation of monsoon precipitation patterns and solar cycles remains ambiguous. This study investigates the influence of the 11-year solar cycle on East Asian summer monsoon precipitation from 1958 to 2020, revealing that the decadal-scale pattern of opposing rainfall anomalies...
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Dr Pavle Arsenović (BOKU, AT)12/06/2026, 12:24
Solar particle events (SPEs) are short-lived bursts of high-energy particles from the solar atmosphere and are important drivers of changes of the atmospheric chemistry. While most SPEs are relatively weak and have limited environmental impacts, evidence from cosmogenic radionuclides indicates that much stronger events have occurred in the past. The effects of such extreme SPEs depend strongly...
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Mr Andrin Jörimann (PMOD/WRC, CH)12/06/2026, 12:36
Cosmogenic $^{10}$Be isotope is an important proxy for past solar activity that can be measured from natural archives such as ice cores. It is mostly produced in the stratosphere and its atmospheric lifetime until the deposition to the surface depends on different transport processes. Notably, $^{10}$Be isotopes may attach to aerosol particles, where these are abundant, and subsequently follow...
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Prof. Brian Tinsley (Texas U., US)12/06/2026, 13:48
At polar latitudes small changes in cloud amount, temperature and pressures correlate with changes in the solar wind electric field. These changes occur on a timescale of days, and in the absence of significant changes in in-situ ion production. They can be understood as resulting from changes in the ionosphere-earth current density, JZ, in the global electric circuit modulating space charge...
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Dr Kseniia Golubenko (Oulu U., FI)12/06/2026, 14:00
Cosmogenic radionuclide $^{36}$Cl serves as an important proxy for reconstructing past solar variability, geomagnetic field intensity, and atmospheric circulation. However, global modeling of $^{36}$Cl remains challenging, particularly due to uncertainties in representing stratospheric chlorine processes. In this study, we implement a new configuration of the chemistry-climate model...
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Dr Antti Salminen (Oulu U., FI)12/06/2026, 14:13
Electrons from the Earth’s magnetosphere precipitate into the polar upper atmosphere. There, energec electron precipitaon (EEP) forms reacve NOx and HOx compounds which, for example, catalycally destroy ozone. In the northern hemisphere EEP and its effect on ozone modulate the temperature so that the westerly winds around the polar region, the so-called polar vortex, strengthen during...
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77. Atmospheric dynamical responses to geomagnetic storms: from case studies to statistical analysesDr Jia Jia (FMI, FI)12/06/2026, 14:25
Precipitation of energetic particles (often referred to as EPP) from solar or magnetospheric origin into the earth polar atmosphere has long been recognized as an important forcing of the chemical budget of the middle atmosphere. Its impact on atmospheric trace gases such as ozone, nitrogen and hydrogen oxides (NO$_\mathrm{x}$ and HO$_\mathrm{x}$), and chlorine species, has been identified....
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Dr Niilo Kalakoski (FMI, FI)12/06/2026, 14:38
The transport of mesospheric nitrogen oxides (NO$_\mathrm{x}$), produced by energetic electron precipitation (EEP), down to stratosphere during polar winter is expected to increase in the future due to acceleration of mean meridional circulation. In stratosphere, the transported NO$_\mathrm{x}$ is known to contribute to the catalytic ozone losses in late winter and early spring.
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We use Whole... -
Prof. Radan Huth (Charles U., CZ)12/06/2026, 14:51
Whether there is association between solar activity and tropospheric circulation, is still an open research question. Various characteristics of circulation have been analyzed in this respect, including its composites and correlation / regression fields, teleconnections (such as the North Atlantic Oscillation), position and duration of blocking events, and frequency of circulation types....
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12/06/2026, 15:03
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Dr Stergios Misios (Academy of Athens, GR)
The North Atlantic sector has been identified as a region where the 11-year solar cycle has small but potentially non-negligible impacts on winter climate, but a debate persists about the robustness of such impacts. This work explores the signatures of the 11-yr solar cycle over the North Atlantic in the ERA5 and 20th Century reanalysis datasets. The results confirm previous studies with a...
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Dr Anna Shapiro (Graz U., AT)
Recent stellar observations have suggested that the Sun could switch to a high-activity regime, causing an increase in ultraviolet radiation with an amplitude about four times larger than that of an average solar activity cycle, together with a simultaneous decrease in total solar irradiance. We investigate the atmospheric response to the switch of the Sun to the high activity regime using the...
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Wojciech J. Miloch (Department of Physics, University of Oslo, Oslo, Norway)Poster
Instabilities and turbulence in the Earth ionosphere can lead to irregularities in the ionospheric plasma density. Ionospheric plasma irregularities are important space weather effects, which can significantly impact the propagation of radio waves through the upper atmosphere, and consequently degrade the quality of trans- ionospheric signals and communication with satellites. This can...
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Mr Markus Similä (Oulu U., FI)Poster
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Mr Markus Similä (Oulu U., FI)Poster
Galactic cosmic rays (GCRs) exhibit a small anisotropy around Earth, which presents as diurnal variation (DV) in the count rates of ground-based neutron monitors (NMs). This fluctuation has a typical amplitude of around 0.3 %. Although the properties of DV have been extensively studied, previous literature still lacks a generalized DV model. Such a model could be used, for example, to separate...
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Ms Srinjana Routh (ARIES, IN)
Accurately measuring the Sun’s polar magnetic fields remains a challenge, whether using Earth-based telescopes or spacecraft operating near the ecliptic plane. Among various indicators, the strength of polar fields at the sunspot cycle minimum, representing the radial component of the poloidal magnetic field, has proven to be the most robust predictor of the toroidal component and thus the...
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Anil Bhardwaj (Physical Research Laboratory (PRL), Ahmedabad, India)Poster
Space Weather research in India started in the middle of nineteenth century with geomagnetic observations leading to earlier records of extreme events in 1870s. India’s oldest Solar observatory established in 1899 rendered innovative science on solar dynamics. Radio sounding of upper atmosphere started in early twentieth century and yielded path-breaking science results on equatorial...
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Anil Bhardwaj (Physical Research Laboratory (PRL), Ahmedabad, India)Poster
Space Weather research in India started in the middle of nineteenth century with geomagnetic observations leading to earlier records of extreme events in 1870s. India’s oldest Solar observatory established in 1899 rendered innovative science on solar dynamics. Radio sounding of upper atmosphere started in early twentieth century and yielded path-breaking science results on equatorial...
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