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SUMMARY:Jet dynamics in topographically-forced shallow-water planetary atm
 ospheres - David Dritschel (University of St Andrews)
DTSTART:20240520T140000Z
DTEND:20240520T143000Z
UID:TALK215716@talks.cam.ac.uk
DESCRIPTION:This talk examines the emergence of jets and their long-time d
 ynamics in global spherical rotating&nbsp\;shallow-water flows.&nbsp\; Dep
 arting from many past studies\, we apply space and time-varying&nbsp\;(tim
 e-correlated) topographic-like forcing exclusively\, and weakly damp therm
 ally.&nbsp\; Results&nbsp\;are presented using Contour Advection\, a numer
 ical approach designed to have extremely&nbsp\;weak numerical damping\, an
 d thus suitable for investigating long-time dynamics.&nbsp\; The&nbsp\;res
 ponse to topographic forcing differs significantly from previously-conside
 red vorticity&nbsp\;forcing\, with a much larger role played by divergent 
 motions (imbalance).&nbsp\; Like in previous&nbsp\;studies\, well-defined 
 quasi-zonal jets emerge\, but these jets can drift meridionally\, which&nb
 sp\;appears to be an effect induced by the divergent motions.\nAuthors: Da
 vid Dritschel\, Richard Scott & Mahdi Jalali\n&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
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