Physics
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3217813p&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 17, CiteID L17813
Physics
13
Atmospheric Composition And Structure: Cloud Physics And Chemistry, Global Change: Atmosphere (0315, 0325), Global Change: Remote Sensing (1855), Atmospheric Processes: Mesospheric Dynamics
Scientific paper
We study a relationship between Polar Mesospheric Cloud (PMC) brightness and coincident mesospheric Kinetic Temperatures (KT) measured by two satellite instruments, the Optical Spectrograph and Infrared Imager System and Sounding of the Atmosphere using Broadband Emission Radiometry respectively. Two fifteen-day periods in July 2002 and 2003 have been analyzed. For coincidences <=3 hours and <=200 km PMCs with a peak at 82-84 km were observed for the mean KT in this height range <=142 K. Bright PMCs, at least twice brighter than the seasonal mean, were detected only for KT <= 134 K. The average KT for PMCs at 80°-82.2°N was lower than that at 60°-75°N by 5-8 K. The average KT coincident with PMCs was 1.4 to 7.9 K lower than that for non-PMC cases. There was up to 7% of non-PMC detections for the very low KT, <=130 K. The total random and systematic uncertainty of this analysis was 9 K.
Degenstein Douglas Arthur
Llewellyn Edam J.
Lloyd Nick D.
Mertens Chris J.
Mlynczak Martin G.
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