Mathematics – Logic
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusm.a52b..06f&link_type=abstract
American Geophysical Union, Spring Meeting 2007, abstract #A52B-06
Mathematics
Logic
2487 Wave Propagation (0689, 3285, 4275, 4455, 6934), 3334 Middle Atmosphere Dynamics (0341, 0342), 3369 Thermospheric Dynamics (0358)
Scientific paper
The response of the upper atmosphere to space weather events from the sun have been studied for decades. The impact of terrestrial weather on the upper atmosphere has received less attention. However, the upper atmosphere and ionosphere clearly exhibit variability on global scales with periods from several hours to several days, characteristic of lower-atmospheric planetary waves and tides. To study the origin, vertical propagation, and possible effects of these planetary-scale perturbations on the coupled thermosphere-ionosphere- electrodynamics system, a new model of Integrated Dynamics through Earth Atmosphere (IDEA) has been developed under a NASA sponsored collaborative project between the University of Colorado and National Weather Service-s (NWS) Environmental Modeling and Space Environment Centers. The IDEA model interactively couples a Whole Atmosphere Model (WAM) with Global Ionosphere-Plasmasphere (GIP) and electrodynamics models. WAM is a 150-layer general circulation model based on NWS's operational weather prediction Global Forecast System (GFS), extended from its nominal top altitude of about 60 km to over 600 km. It incorporates relevant physical processes in the extended domain, ranging from the hydrological cycle, cloud physics, and atmosphere-surface exchanges in the troposphere, to solar and Joule heating and mutual diffusion of major species in the thermosphere. Preliminary simulations reveal that day-to-day modulation of the tidal forcing of the lower thermosphere drives changes in the neutral wind dynamo, electrodynamics, and a redistribution of plasma at mid and low latitudes.
Akmaev Rashid
Codrescu Mihail
Fuller-Rowell Tim
Hou Yu
Iredell Mark
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