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Decreases in atomic...
Decreases in atomic hydrogen over the summer pole : Evidence for dehydration from polar mesospheric clouds?
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- Siskind, David E. (author)
- Space Science Division, Naval Research Laboratory, Washington, DC
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- Marsh, Daniel R. (author)
- National Center for Atmospheric Research, Boulder, Colorado
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- Mlynczak, Martin G. (author)
- NASA Langley Research Center, Hampton
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- Martin-Torres, Javier (author)
- AS&M Inc., Hampton
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- Russell, James M. (author)
- Center for Atmospheric Sciences, Hampton University
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(creator_code:org_t)
- 2008
- 2008
- English.
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In: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 35:13
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Observations from the Sounding of the Atmosphere with Broadband Emission Radiometry (SABER) instrument on the NASA/Thermospheric Ionosphere Mesosphere Energetics and Dynamics satellite show a surprising decrease in the inferred atomic hydrogen (H) over the polar regions in the lowermost thermosphere during the summer. This contrasts with predictions by global models that H should peak in this region at this time. We suggest the decrease is a consequence of the sequestering of the water vapor by the formation of polar mesospheric clouds (PMCs) that redistributes the H2O thus reducing the chemical source of H. This decrease is more pronounced in the Northern rather than the Southern summer which is roughly consistent with the known morphology of PMCs. A model calculation which includes a PMC parameterization gives good qualitative agreement with the data suggesting that this process should be considered in global models of the coupling between the middle and upper atmosphere. Copyright 2008 by the American Geophysical Union.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Keyword
- Atmospheric science
- Atmosfärsvetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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