Coupled Geospace: Part 1: Jan 2004 flares, magnetic activity and solar wind voids (Joint ICESTAR-CAWSES campaign), March/April 2004 CAWSES campaign events, High Speed Streams in 2003; Part 2: Magnetic storms and superstorms, other sun-earth events

Conveners:
Larry Paxton (larry.paxton@jhuapl.edu), Applied Physics Laboratory at the John Hopkins University
Janet Kozyra (jukozyra@umich.edu), University of Michigan

Workshop Format: web-enabled workshop with one introductory talk followed by short presentations

2005 July 01, 0800-1000 AM and 1030-1230 AM, Eldorado Anasazi Room

The current solar cycle has provided new opportunities to examine the coupled geospace system as it responds to a variety of drivers. Since the launch of the TIMED satellite in late 2001, geospace has been rocked by powerful high speed streams in 2003, four different superstorm events in 2003 and 2004, a variety of magnetic storms, high dynamic pressure hits, and intervals of repeated long-duration flare events, the latest in January 2005, which also produced several post-ejecta regions of extremely low density solar wind. The solar wind void intervals permitted intense up to 10 keV polar rain to enter the polar cap creating strong interhemispheric asymmetries in the ITM system during a magnetically active interval. Evidence is accumulating that:

1. the MLTI response depends on the order of solar and solar wind drivers through preconditioning effects
2. coupling between geospace regions is important in determining even features as fundamental as the polar cap potential
3. disturbances to atmospheric chemistry may be prolonged through interactions with dynamical features in the atmosphere
4. extreme events may modify signatures of ion-neutral coupling

At the same time, a distributed fleet of operating satellite missions Worldwide are viewing elements of the system from sun to Earth. Ground-based observations are becoming more integrative, providing global rather than regional views of the system. New efforts at integrating ground-based observations, through global maps and data assimilation are being pursued as part of the CAWSES program, the ICESTAR program and in preparation for the International Heliophysical Year 2007. This workshop seeks to find new ways of integrating observations from satellites, and ground-based facilities, assimilative models and large-scale simulations to explore the ionosphere and atmosphere as active elements in the geospace system.