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SUMMARY:Exploring sources of gravity waves in the southern winter stratosp
 here using 3-D satellite observations and backwards ray-tracing - Phoebe N
 oble (University of Bath)
DTSTART:20241128T110000Z
DTEND:20241128T120000Z
UID:TALK224791@talks.cam.ac.uk
CONTACT:Thomas Caton Harrison
DESCRIPTION:Atmospheric gravity waves have a wide a variety of sources suc
 h as wind flow over mountains\, convection\, jet stream instabilities. How
 ever\, most observations of gravity waves allow us to only make informed g
 uesses of their sources using their location and spatial characteristics. 
 Here we use stratospheric gravity waves from AIRS (Atmospheric InfraRed So
 under) and ray trace them back to their sources using GROGRAT (Gravity-wav
 e Regional Or Global Ray Tracer). Our study focuses on the southern winter
  stratosphere\, where some of the most intense stratospheric gravity wave 
 activity is found. Here\, questions remain about ‘missing momentum flux
 ’ near 60 °S which is present in observations\, but not in general circ
 ulation models. We use our backwards traced rays to investigate the latera
 l propagation of these waves\, small island sources and the split between 
 orographic and non-orographic waves. This work aims answer the question: 
 “Where do gravity waves observed in the stratosphere come from?”
LOCATION:BAS Meeting Room 154 and Zoom
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