The relationship between the speed and the latitude of the eddy-driven jet; implications for climate change and stratosphere-troposphere coupling

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• Joe Kidston, University of New South Wales, Sydney, Australia
• Wednesday 17 April 2013, 13:00-14:00
• Centre for Mathematical Sciences, MR 12.

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This talk aims to shed light on the controls on the latitude of Earth’s jet streams and storm tracks. The relationship between the speed and the latitude of the eddy-driven jet is investigated in a hierarchy of general circulation models.

A stirred barotropic model is used to show that quasilinear wave-mean flow interaction theory predicts that faster jets should be shifted poleward. The implications for mid-latitude circulation changes in response to both forced climate change, and temporary stratospheric wind-speed anomalies, are discussed and investigated using primitive equation GCMs.

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