Water vapor and odd hydrogen in the middle and upper atmosphere: an overview of current observations and modeling (Invited)

Details Water vapor and odd hydrogen in the middle and upper atmosphere: an overview of current observations and modeling (Invited) Water vapor and odd hydrogen in the middle and upper atmosphere: an overview of current observations and modeling (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa53a..01t&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA53A-01

Physics

[0300] Atmospheric Composition And Structure, [0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry

Scientific paper

Quantifying and understanding the global odd hydrogen (HOx = HO2+OH+H) distribution is important for our ability to characterize the loss mechanism of H2O from the lower through Jeans (thermal) escape and through charge exchange with energetic ions from the solar wind and the inner magnetosphere (i.e., producing energetic neutral atoms). The vertical distribution is especially important as the middle atmosphere HOx ultimately controls the distribution of hydrogen in the thermosphere, exosphere and the geocorona. In this paper, we present current observations of water vapor and odd hydrogen from the mesosphere to the thermosphere using data from the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) and AURA satellites. We discuss the temporal spatial distribution of these atmospheric species and compare the observations with two current models of the middle and upper atmosphere, the Thermosphere Ionosphere Mesosphere Electrodynamics General Circulation Model and the Whole Atmosphere Community Climate Model.

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