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SUMMARY:An overview on AIRS observations of stratospheric gravity waves - 
 Dr Lars Hoffmann\, Juelich Research Centre\, Germany.
DTSTART:20150217T143000Z
DTEND:20150217T150000Z
UID:TALK57942@talks.cam.ac.uk
CONTACT:Dr Andrew Orr
DESCRIPTION:Atmospheric gravity waves transport energy and momentum\, cont
 ribute to turbulence and mixing\, and have significant impact on the mean 
 circulation and thermal structure of the middle atmosphere. Satellite inst
 ruments offer an excellent opportunity to study the characteristics of gra
 vity waves on a global scale and on time scales of years to decades. This 
 presentation focuses on gravity wave observations with the Atmospheric Inf
 rared Sounder (AIRS) aboard NASA's Aqua satellite. A method to extract inf
 ormation on stratospheric gravity waves from 4.3 micron radiance measureme
 nts is described. The method is illustrated for a set of case studies\, fo
 cusing on the impact of orographic gravity waves on the formation of polar
  stratospheric clouds. The presentation also covers statistical analyses o
 f a ten-year record of AIRS data\, which was used to identify hotspots of 
 stratospheric gravity wave activity on a global scale.\n
LOCATION:British Antarctic Survey\, Room 307
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