Computer Science – Sound
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa51a1209t&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SA51A-1209
Computer Science
Sound
[0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [0341] Atmospheric Composition And Structure / Middle Atmosphere: Constituent Transport And Chemistry, [0342] Atmospheric Composition And Structure / Middle Atmosphere: Energy Deposition
Scientific paper
The data collected by Fe Boltzmann lidar from 2003 to 2005 at Rothera, Antarctica (67.5 S, 68.0 W) are used to generate temperature morphology in stratosphere and mesosphere covering an entire year. Satellite temperatures by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) are compared to the lidar data and show good agreements in general. SABER provides near global coverage on a daily basis but yaws toward the Northern Hemisphere resulting in months when comparisons are not available. The lidar measures the temperature profile over Rothera at high vertical resolution while the vertical resolution of SABER is 2-3 km. Large variability in temperature is observed in austral fall and spring around 60 km. In this work, we explore the extent to which the observed variability is due to sampling inside, at the edge, or outside the Antarctic polar vortex. The edge of the vortex is co-located with very large temperature gradient and daily movement of the vortex likely contributes to a geophysical explanation for large temperature variations. The position of the vortex edge, based on GEOS-5 temperatures and winds, is used to aid in the interpretation of the temperature structure as a function of altitude and time. Results will be shown that indicate notable differences between profiles sampled in the different air mass regions.
Chu Xiaoyong
Espy Patrick J.
Gardner Chester S.
Harvey L.
Tan Bo
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