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SUMMARY:Mechanisms of formation of a Mesospheric Inversion Layer and Subse
 quent Elevated Stratopause Associated with the 2019 Stratospheric Sudden W
 arming - Haruka Okui\, University of Tokyo
DTSTART:20221017T120000Z
DTEND:20221017T130000Z
UID:TALK183689@talks.cam.ac.uk
CONTACT:9780
DESCRIPTION:Following several prolonged stratospheric sudden warmings (SSW
 s)\, disappearance of the lowered stratopause and its reformation at a hig
 her altitude have been observed. This phenomenon is known as an elevated s
 tratopause (ES). Despite its importance in the dynamics and material trans
 port in the middle atmosphere\, the mechanism of ES formation is still not
  fully understood\, especially regarding the relative roles of atmospheric
  waves. To elucidate this mechanism\, we performed a hindcast of the 2019 
 SSW event using a gravity-wave permitting high-top general circulation mod
 el. Three-dimensional and quantitative analysis revealed crucial roles of 
 the interplay between gravity waves and Rossby waves in the mechanisms of 
 the series of dynamical phenomena observed before/after the SSW\, includin
 g an ES.
LOCATION:MR5\, CMS
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