The dynamics of stratospheric warmings generated by a general circulation model of the troposphere and stratosphere

Details The dynamics of stratospheric warmings generated by a general circulation model of the troposphere and stratosphere The dynamics of stratospheric warmings generated by a general circulation model of the troposphere and stratosphere

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980qjrms.106..659o&link_type=abstract

Royal Meteorological Society, Quarterly Journal, vol. 106, Oct. 1980, p. 659-690.

Mathematics

Logic

9

Atmospheric Circulation, Stratosphere, Stratospheric Warming, Synoptic Meteorology, Troposphere, Atmospheric Heat Budget, Atmospheric Models, Flow Stability, Meridional Flow, Meteorological Charts, Northern Hemisphere, Planetary Waves

Scientific paper

A feature of integrations with a general circulation model of the troposphere and stratosphere was that events were spontaneously produced closely resembling stratospheric sudden warmings. One example is examined in detail by means of momentum, heat and energy budget calculations, after a description of its main synoptic developments. Brief reference is made to two other model-simulated warmings. It is argued that Matsuno's simplest idealization of statospheric sudden warmings does not provide an adequate description of these events. The appearance of equatorward eddy momentum fluxes was found to have played a central role in their evolution. A mechanism is proposed by means of which such a flux reversal might occur in the stratosphere. The model warmings were apparently instigated by planetary-scale changes in the troposphere, rather than by internal hydrodynamic instability.

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