Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds?

Details Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds? Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds?

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3513809s&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 13, CiteID L13809

Computer Science

Sound

2

Atmospheric Composition And Structure: Thermosphere: Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere: Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties

Scientific paper

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.

Affiliated with

Also associated with

No associations

Rating

Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Decreases in atomic hydrogen over the summer pole: Evidence for dehydration from polar mesospheric clouds? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1318480