SA010
Current System throughout Geospace: Its Drivers, Dynamics, and Coupling
Session ID#: 247933
Session Description:
Currents in the magnetosphere interact dynamically with the ionosphere, varying significantly in space and time, especially during strong solar wind driving. Ionospheric currents provide insights into the magnetosphere. A simple picture of field-aligned currents closing at high latitudes exists. The low and mid-latitude current system is illustrated by a solar quiet (Sq) current system connected by interhemispheric field-aligned current and the equatorial electrojet. However, the reality is more complex with currents connecting globally and varying in 3D. These complexities are not fully understood, even though these currents play a significant role in the energetics through energetic precipitating particles, ion-neutral coupling, momentum exchange, and the ionospheric electrodynamo. Direct current measurements are challenging, often inferred from magnetic perturbations at ground or LEO altitudes and local rocket measurements. This session seeks contributions on the current system, its drivers, dynamics, and coupling, using observations, models, and their combinations to connect different AGU section’s perspectives.
Co-Sponsor(s):
Index Terms:
1541 Satellite magnetics: main field, crustal field, external field [GEOMAGNETISM AND PALEOMAGNETISM]
2409 Current systems [IONOSPHERE]
2431 Ionosphere/magnetosphere interactions [IONOSPHERE]
7815 Electrostatic structures [SPACE PLASMA PHYSICS]
Primary Convener: Astrid I Maute, University of Colorado, Boulder, CIRES, Boulder, United States
Conveners: Patrick Alken, University of Colorado Boulder, CIRES, Boulder, CO, United States, Karl Laundal, University of Bergen, Department of Physics and Technology, Bergen, Norway and Yukitoshi Nishimura, Boston University, Boston, MA, United States
Student/Early Career Convener: Sneha Yadav, UCLA, Atmospheric and Oceanic Sciences, Los Angeles, United States
Five extreme storm time auroral electrojet events: Testing our understanding. (1865565)
Jesper W Gjerloev, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, Shinichi Ohtani, JHU/APL, Laurel, United States and Ying Zou, The University of Alabama in Huntsville, Huntsville, United States
Towards a physically constrained empirical model of climatological variations of ionospheric F-region magnetic field and electric currents (1886671)
Martin Fillion, Institut de Physique du Globe de Paris, Paris, France, Gauthier Hulot, IPGP, Paris, France and Patrick Alken, University of Colorado Boulder, CIRES, Boulder, CO, United States
In situ Hall and Pedersen Conductivity During a Weak, Pre-midnight Auroral Arc: The ACES-II Twin Rocket Campaign (1955744)
Connor Feltman1, Scott R Bounds1, Stephen Roland Kaeppler2, Kenton Greene3, Roger Roglans4, John W Bonnell4 and Marc Lessard5, (1)University of Iowa, Physics and Astronomy, Iowa City, United States, (2)SRI International, Menlo Park, United States, (3)Space Sciences Laboratory, Berkeley, United States, (4)University of California, Berkeley, Space Sciences Laboratory, Berkeley, United States, (5)University of New Hampshire, Durham, United States
Global Ionospheric Electrodynamics During Geomagnetic Storms: Combined Effects of Wind-Driven Dynamo, Magnetospheric Field-Aligned Currents and Energetic Particle Precipitation (1965212)
Haonan Wu1, Astrid I Maute2, Wenbin Wang3, Viacheslav G Merkin4, Dong Lin5, Arthur D Richmond3, Kareem Sorathia6, Jesper W Gjerloev7, Hanli Liu8, Joseph M McInerney8 and Francis Vitt9, (1)University Corporation for Atmospheric Research, Boulder, CO, United States, (2)University of Colorado, Boulder, CIRES, Boulder, United States, (3)National Center for Atmospheric Research, High Altitude Observatory, Boulder, CO, United States, (4)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States, (5)NCAR, Boulder, United States, (6)Johns Hopkins University Applied Physics Laboratory, Laurel, United States, (7)Johns Hopkins University, Applied Physics Laboratory, Laurel, United States, (8)NSF National Center for Atmospheric Research, High Altitude Observatory, Boulder, United States, (9)National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, United States
Modeling Auroral-Like Forms: The Role of Parallel Electric Fields and Turbulent Conductivities (1966675)
Pralay Raj Vaggu1, Matthew D Zettergren1, Lilias Claire Gasque2, Brian J Harding3, Matt Young4 and Joaquin Mateo Diaz Pena5, (1)Embry-Riddle Aeronautical University, Department of Physical Sciences, Daytona Beach, FL, United States, (2)Dartmouth College, Department of Physics and Astronomy, Hanover, United States, (3)University of California, Berkeley, Space Sciences Laboratory, Berkeley, United States, (4)University of New Hampshire, Durham, United States, (5)Boston University, Boston, MA, United States
Validation of ICON-Derived Ionospheric Currents Using Ohm’s Law and Swarm Data: Assessing the Role of Conductivity (2002876)
Yen-Jung Wu, University of California Berkeley, Space Sciences Laboratory, Berkeley, CA, United States, Stephen B Mende, Univ California, Berkeley, United States, Brian J Harding, University of California, Berkeley, Space Sciences Laboratory, Berkeley, United States, Patrick Alken, University of Colorado Boulder, CIRES, Boulder, CO, United States, Astrid I Maute, University of Colorado, Boulder, CIRES, Boulder, United States, Colin Charles Triplett, Space Sciences Laboratory, Space Sciences Laboratory, Berkeley, United States, Thomas J Immel, University of California Berkeley, Space Sciences Laboratory, Berkeley, United States, Lilias Claire Gasque, Dartmouth College, Department of Physics and Astronomy, Hanover, United States and Cornelius Csar Jude Salinas, NASA Goddard Space Flight Center, Greenbelt, United States; University of Maryland Baltimore County, Baltimore, United States
