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ADIW03 | Prof. David Dritschel | Jet dynamics in topographically-forced shallow-water planetary...
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Speaker: Professor David Dritschel (University of St Andrews)
Date: 20th May 2024 - 15:00 to 15:30
Venue: INI Seminar Room 1
Title: Jet dynamics in topographically-forced shallow-water planetary atmospheres
Event: (ADIW03) Climate Applications of Layering
Abstract: This talk examines the emergence of jets and their long-time dynamics in global spherical rotatingshallow-water flows. Departing from many past studies, we apply space and time-varying(time-correlated) topographic-like forcing exclusively, and weakly damp thermally. Resultsare presented using Contour Advection, a numerical approach designed to have extremelyweak numerical damping, and thus suitable for investigating long-time dynamics. Theresponse to topographic forcing differs significantly from previously-considered vorticityforcing, with a much larger role played by divergent motions (imbalance). Like in previousstudies, well-defined quasi-zonal jets emerge, but these jets can drift meridionally, whichappears to be an effect induced by the divergent motions.
Authors: David Dritschel, Richard Scott & Mahdi Jalali
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The Isaac Newton Institute is a national and international visitor research institute. It runs research programmes on selected themes in mathematics and the mathematical sciences with applications over a wide range of science and technology. It attracts leading mathematical scientists from the UK and overseas to interact in research over an extended period.
Date: 20th May 2024 - 15:00 to 15:30
Venue: INI Seminar Room 1
Title: Jet dynamics in topographically-forced shallow-water planetary atmospheres
Event: (ADIW03) Climate Applications of Layering
Abstract: This talk examines the emergence of jets and their long-time dynamics in global spherical rotatingshallow-water flows. Departing from many past studies, we apply space and time-varying(time-correlated) topographic-like forcing exclusively, and weakly damp thermally. Resultsare presented using Contour Advection, a numerical approach designed to have extremelyweak numerical damping, and thus suitable for investigating long-time dynamics. Theresponse to topographic forcing differs significantly from previously-considered vorticityforcing, with a much larger role played by divergent motions (imbalance). Like in previousstudies, well-defined quasi-zonal jets emerge, but these jets can drift meridionally, whichappears to be an effect induced by the divergent motions.
Authors: David Dritschel, Richard Scott & Mahdi Jalali
-------------------
FOLLOW US
SEMINAR ROOMS
ABOUT
The Isaac Newton Institute is a national and international visitor research institute. It runs research programmes on selected themes in mathematics and the mathematical sciences with applications over a wide range of science and technology. It attracts leading mathematical scientists from the UK and overseas to interact in research over an extended period.