Diurnal Variations of Energetic O(3P) and O(1D) Atoms in the Thermosphere and Mesosphere

Details Diurnal Variations of Energetic O(3P) and O(1D) Atoms in the Thermosphere and Mesosphere Diurnal Variations of Energetic O(3P) and O(1D) Atoms in the Thermosphere and Mesosphere

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa72a0515k&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA72A-0515

Physics

0300 Atmospheric Composition And Structure, 0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition

Scientific paper

Diurnal variations of energy distributions of hotO(3P) and O(1D) atoms in the thermosphere and the upper mesosphere are investigated. The rate of atmospheric heating by hot oxygen atoms and non-equilibrium rates of atmospheric chemical reactions involving O(3P) and O(1D) atoms are calculated using non-thermal distributions of oxygen atoms. The non-Maxwellian energy distributions of the ground state and metastable oxygen atoms are determined by solutions of the coupled kinetic equations describing the energy relaxation of the fast O atoms in elastic and quenching collisions with the ambient gas. Quenching collisions of metastable oxygen atoms with N2, O2 and O are secondary sources of energetic O(3P) atoms. Relative fractions of metastable atoms in non-thermal distributions are calculated and compared with results of previous modeling.

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