Continual Initialization of The TING Model with GAIM Electron Densities: Ionospheric Effects on The Thermosphere

Details Continual Initialization of The TING Model with GAIM Electron Densities: Ionospheric Effects on The Thermosphere Continual Initialization of The TING Model with GAIM Electron Densities: Ionospheric Effects on The Thermosphere

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa13a0263j&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA13A-0263

Physics

0358 Thermosphere: Energy Deposition (3369), 2400 Ionosphere (6929), 2437 Ionospheric Dynamics, 3369 Thermospheric Dynamics (0358), 7954 Magnetic Storms (2788)

Scientific paper

We have continually replaced the electron and O+ densities in the Thermosphere Ionosphere Nested Grid (TING) model by the electron densities from the Global Assimilation of Ionospheric Measurements (GAIM) model at pressure level z=-2 (about 165 km altitude) and above during early April 2004. There was an extended quiet period during this interval followed by a moderate geomagnetic storm (K_p ~ 6.0). The ingestion of the GAIM electron densities had little effect on the neutral temperature and composition during the quiet period before the storm, but there was a noticeable global effect on the neutral winds at this time that resulted from changes in ion drag. During disturbed periods, the changed electron densities had large effects on the global thermosphere. Increases in the auroral electron densities enhance the Joule heating rate, which results in considerable increases in the high-latitude neutral temperatures. These temperature increases induce fairly large modification of the global circulation of the neutral atmosphere and thereby affect neutral temperature and composition at low and middle latitudes.

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