Computer Science – Sound
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..661m&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 8, p. 661-664
Computer Science
Sound
4
Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry
Scientific paper
The data from the B2 channel of the Stratospheric and Mesospheric Sounder (SAMS), flown on Nimbus 7, were intended to provide water vapor cross-sections ranging from 435°S-65°N in latitude and from 30-65 km in altitude. However, anomalous cross-sections obtained by Mutlow [1984] suggest that the in-flight transmittance behavior of the SAMS B2 channel was different from that expected. As a result a two-stage retrieval process has been developed to obtain both an improved estimate of the transmittance behavior of the channel, and the required water vapor cross-sections. The water vapor cross-sections obtained over the three-year period from January 1979-December 1981, clearly show the presence of a mid to high latitude summer maximum in water vapor at ~5-10 mb (~30-35 km), a poleward decrease in volume mixing ratios below ~10 mb (~30 km) in the winter hemisphere, a secondary maximum in the summer hemisphere at ~0.1 mb (~65 km) in the lower mesosphere, and a less distinct equatorial minimum at ~10 mb (~30 km). However, the latter has not been shown to be statistically significant in this analysis.
Munro R.
Rodgers C. D.
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