2016 CAP Congress / Congrès de l'ACP 2016

Session

M1-3 Theory, Modelling, and Forecasting I (DASP) / Théorie, modélisation et prévisions I (DPAE)

M1-3

13 Jun 2016, 10:30

University of Ottawa

Conveners

M1-3 Theory, Modelling, and Forecasting I (DASP) / Théorie, modélisation et prévisions I (DPAE)

• David Knudsen (University of Calgary)

1279. The “Impenetrable Barrier” Revisited: Bursting the VLF Bubble

Dr Stavros Dimitrakoudis (University of Alberta)

13/06/2016, 10:30

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

In a recent paper, Baker et al. (Nature, 2014) reported the observation of an “impenetrable barrier” to the inner edge of the ultra-relativistic electron radiation belt. These authors demonstrated that this barrier location was not coincident with the location of the plasmapause nor any other identifiable magnetospheric boundary; nor could it be explained by the scattering of...

1052. Determination of global-scale diffusion coefficients in the stratosphere using a new model of local mixing

Wayne Hocking (University of Western Ontario)

13/06/2016, 10:45

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

Due to the intermittency and spatial distribution of small layers of turbulence in the stratosphere, determination of large-scale diffusion coefficients is a non-trivial process. Previous models have assumed that all layers are perfectly mixed, but generally spatio-temporally disconnected. Our new model allows for partially mixed layers, especially for large and intense layers, which has...

1023. Development of the Canadian Ionosphere and Atmosphere Model

Oleg Martynenko (York University)

13/06/2016, 11:00

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

Current status of the Canadian Ionosphere and Atmosphere Model (C-IAM) project is described. The C-IAM has been composed from two pre-existing first principles models: the extended Canadian Middle Atmosphere (CMAM) and the ionospheric part of the Upper Atmosphere Model (UAM). The model domain extends from the surface to the inner magnetosphere and two-way coupling between the neutral...

1078. A link between high-speed solar wind streams and extratropical cyclones

Paul Prikryl (Geomagnetic Laboratory, Natural Resources Canada, Ottawa, ON; Physics Department, University of New Brunswick, Fredericton, NB, Canada)

13/06/2016, 11:15

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

Databases of extratropical-cyclone tracks obtained from two meteorological reanalysis datasets are used in superposed epoch analysis of time series of solar wind plasma parameters and green coronal emission line intensity. The time series are keyed to times of maximum growth of explosively developing extratropical cyclones during northern and southern winters. The new statistical evidence...

1210. Farley-Buneman waves at large aspect angles

patrick perron (RMCC)

13/06/2016, 11:30

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

The Farley-Buneman (FB) instability mechanism provides an excellent explanation for the presence of large amplitude plasma waves in the cm to few m wavelength range in the high latitude E region whenever the ambient electric field exceeds 20 mV/m. Observations suggest that the instabilities are observed at their threshold speed when they reach their largest amplitudes. This can be explained in...

1257. Magnetosphere-Ionosphere Coupling at Substorm Expansion Phase Onset

Dr Stavros Dimitrakoudis (University of Alberta)

13/06/2016, 11:45

Atmospheric and Space Physics / Physique atmosphérique et de l'espace (DASP-DPAE)

Oral (Non-Student) / orale (non-étudiant)

With the explosive release of energy within a substorm, stored magnetic energy is quickly converted to plasma kinetic energy, resulting in dramatic changes in the large-scale magnetic topology of the Earth’s night-side magnetic field and in increases in the flux of energetic particles in near-Earth space, and generates an apparently repeatable time series of events in the dynamic aurora...