ON THE DYNAMICS OF SUBTROPICAL UPPER-TROPOSPHERIC QUASI-STATIONARY VORTICES IN NORTHERN SUMMER
Author(s): Zhu Zhengxin Nanjing Institute of Meteorology, Nanjing
Pages: 156-163
Year: 1988 Issue: 2
Journal: Acta Meteorologica Sinica
Keyword: 卫分; 上阵;
Abstract: In this paper the dynamic mechanism of the subtropical quasi-stationary vortices in the upper troposphere, such as the southern Asia high and the mid-oceanic troughs,are studied with a highly truncated spectral model, in which the thermal forcing and the nonlinear interaction between wave and zonal components,as well as the basic zonal flow changing with latitudes are incorporated.The results show a stable equilibrium state with an upper level fiow field similar to the observed subtropical systems.It is found that the thermal forc- ing has some important controlling effects on these planetary-scale vortices.
Pages: 156-163
Year: 1988 Issue: 2
Journal: Acta Meteorologica Sinica
Keyword: 卫分; 上阵;
Abstract: In this paper the dynamic mechanism of the subtropical quasi-stationary vortices in the upper troposphere, such as the southern Asia high and the mid-oceanic troughs,are studied with a highly truncated spectral model, in which the thermal forcing and the nonlinear interaction between wave and zonal components,as well as the basic zonal flow changing with latitudes are incorporated.The results show a stable equilibrium state with an upper level fiow field similar to the observed subtropical systems.It is found that the thermal forc- ing has some important controlling effects on these planetary-scale vortices.
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