SA33A:
Interhemispheric Differences in High-Latitude Geospace I


Session ID#: 11159

Session Description:
Our knowledge about the Sun-Earth interaction is to a large extent based on measurements from only the northern hemisphere. Recent datasets (SuperDARN, SuperMAG, AMPERE, satellite imaging and statistics from satellites such as CHAMP, Cluster and Swarm) provide measurements of several key parameters from both hemispheres simultaneously. Studies reveal that there are important differences between the hemispheres that depend on external drivers and on differences in ionospheric and thermospheric feedback (M-I-T coupling). This session calls for papers exploring interhemispheric asymmetries, and high latitude geospace as a two-hemisphere system. We welcome studies using conjugate observations, statistical techniques, as well as simulations and theoretical considerations.
Primary Convener:  Karl Laundal, University of Bergen, Department of Physics and Technology, Bergen, Norway
Conveners:  Matthias Foerster, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, Steve E. Milan, University of Leicester, Leicester, United Kingdom and Nikolai Ostgaard, University of Bergen, Birkeland Centre for Space Science, Bergen, Norway
Chairs:  Karl Laundal, University of Bergen, Department of Physics and Technology, Bergen, Norway, Matthias Foerster, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, Nikolai Ostgaard, University of Bergen, Birkeland Centre for Space Science, Bergen, Norway and Steve E. Milan, University of Leicester, Leicester, United Kingdom
OSPA Liaison:  Karl Laundal, University of Bergen, Department of Physics and Technology, Bergen, Norway

Cross-Listed:
  • SM - SPA-Magnetospheric Physics
Index Terms:

2407 Auroral ionosphere [IONOSPHERE]
2427 Ionosphere/atmosphere interactions [IONOSPHERE]
2431 Ionosphere/magnetosphere interactions [IONOSPHERE]
2784 Solar wind/magnetosphere interactions [MAGNETOSPHERIC PHYSICS]

Abstracts Submitted to this Session:

North-south asymmetries in magnetospheric and ionospheric plasma circulation (Invited) (64597)
Stein Haaland1, Matthias Foerster2, Karl Laundal3, Kenneth G McCracken4, Lukas Maes5, Bjorn Lybekk6 and Arne Pedersen6, (1)Max-Planck Institute, Goettingen, Germany, (2)Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany, (3)University of Bergen, Department of Physics and Technology, Bergen, Norway, (4)Organization Not Listed, Washington, DC, United States, (5)Belgisch Instituut voor Ruimte-Aeronomie, Brussel, Belgium, (6)University of Oslo, Department of Physics, Oslo, Norway
UV Observations of Hemispheric Asymmetry (76571)
Robert K Schaefer1, Larry J Paxton2, Brian C Wolven3, Yongliang Zhang4 and Giuseppe Romeo2, (1)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (2)Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States, (3)Johns Hopkins University Applied Physics Laboratory, Laurel, United States, (4)Johns Hopkins University, Baltimore, MD, United States
Interhemispheric Differences in High-Latitude Flows and Poynting Flux Observed by Swarm (Invited) (59927)
David J Knudsen1, Matthew Patrick1, Johnathan K Burchill1 and William Edward Archer2, (1)University of Calgary, Calgary, AB, Canada, (2)University of Saskatchewan, Saskatoon, SK, Canada

On which timescales are By induced in the closed magnetosphere? (79276)

Paul Tenfjord1, Nikolai Ostgaard1, Robert J Strangeway2, Kristian Snekvik1, Karl Laundal3, Jone Peter Reistad1, Steve E. Milan4 and Stein Haaland5, (1)University of Bergen, Birkeland Centre for Space Science, Bergen, Norway, (2)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, (3)University of Bergen, Department of Physics and Technology, Bergen, Norway, (4)University of Leicester, Leicester, United Kingdom, (5)University of Bergen, Bergen, Norway
Interhemispheric Differences in the Upper Atmosphere (Invited) (73724)
Aaron J Ridley, University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, MI, United States
Assimilative Mapping of Interhemispheric Polar Ionospheric Electrodynamics (68534)
Tomoko Matsuo, University of Colorado Boulder, Boulder, United States, Arthur D Richmond, National Center for Atmospheric Research, Boulder, CO, United States, Delores J Knipp, University of Colorado, Aerospace Engineering Sciences, Boulder, United States and Ryan Michael McGranaghan, University of Colorado, Boulder, CO, United States
Comparison between thermospheric winds measured by a ground-based Fabry-Perot spectrometer at Mawson, Antarctica, and winds determined in-situ from satellite drag (Invited) (60827)
Mark Conde, University of Alaska Fairbanks, Fairbanks, AK, United States, Anasuya L Aruliah, University College London, Physics and Astronomy, London, United Kingdom and Eelco Doornbos, Royal Netherlands Meteorological Institute, Aerospace Engineering, De Bilt, Netherlands
Characteristics of satellite accelerometer measurements of thermospheric neutral winds at high latitudes (61753)
Eelco Doornbos, Royal Netherlands Meteorological Institute, Aerospace Engineering, De Bilt, Netherlands, Aaron J Ridley, University of Michigan Ann Arbor, Ann Arbor, United States, Ingrid Cnossen, NERC British Antarctic Survey, Cambridge, United Kingdom, Anasuya L Aruliah, University College London, Physics and Astronomy, London, United Kingdom and Matthias Foerster, Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Potsdam, Germany

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