Temperature, density, and composition in the disturbed thermosphere from Esro 4 gas analyzer measurements - A global model

Details Temperature, density, and composition in the disturbed thermosphere from Esro 4 gas analyzer measurements - A global model Temperature, density, and composition in the disturbed thermosphere from Esro 4 gas analyzer measurements - A global model

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..684j&link_type=abstract

Journal of Geophysical Research, vol. 82, Feb. 1, 1977, p. 684-688. Bundesministerium für Forschung und Technologie;

Physics

2

Atmospheric Composition, Atmospheric Density, Atmospheric Temperature, Thermosphere, Argon, Density Wave Model, Esro 4 Satellite, Gas Analysis, Geomagnetism, Helium, Nitrogen, Oxygen

Scientific paper

An analysis of density measurements of Ar, N2, O, and He made at 280 km with the gas analyzer aboard the polar-orbiting satellite Esro 4 has yielded a global model of the variations in temperature, density, and composition that occur in the disturbed thermosphere. In the model the increase of temperature over quiet conditions is a nonlinear function of the planetary geomagnetic index, its latitude profile being approximated by a fourth-power sin phi law, where phi is the 'invariant' magnetic latitude. A density wave proceeding from high latitudes is approximated by a fourth power cos phi law. A strong nonlinearity in the relation between the temperature variations and the variations in the height of the homopause explains a previously found behavioral difference in the variation of atomic oxygen during magnetic storms and during periods of sustained geomagnetic activity.

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