Conveners
3.2 Climate and atmospheric effects (chair Hilde Nesse and Roelf Du Toit Strauss)
- Tatiana Egorova (PMOD/WRC)
3.2 Climate and atmospheric effects (chair Hilde Nesse and Roelf Du Toit Strauss)
- Tatiana Egorova (PMOD/WRC)
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Dr Timofei Sukhodolov (PMOD/WRC, CH)12/06/2026, 11:40Invited review
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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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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