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Stratosphere-troposphere exchange processes caused by deep southwest vortex and plateau vortex
ZHANG Qi, LI Yueqing, QING Quan
Journal of Arid Meteorology    2025, 43 (1): 32-40.   DOI: 10.11755/j.issn.1006-7639-2025-01-0032
Abstract64)   HTML14)    PDF(pc) (16907KB)(162)       Save

In order to explore whether the deep plateau vortex and southwest vortex system can trigger the material exchange between the atmospheric stratosphere-troposphere, based on the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis data, the dynamic structure, the cross-tropopause mass flux and the trajectory of the gas block during the deep southwest vortex on June 30, 2013 and the plateau vortex on July 23, 2010 were analyzed in detail. The results show that: The deep southwest vortex and plateau vortex develop significantly in the vertical direction, and their internal updrafts develop exceptionally strongly, reaching up to 100 hPa and crossing the troposphere into the stratosphere. There is a strong mass exchange between the stratosphere and troposphere during the formation and mature stages of the vortexes, and the vertical transport term contributes the most to the total flux. The unusually strong upward motion of the low vortex causes part of the tropospheric air mass to be transported to the stratosphere. These results reveal some new important facts: The deep southwest vortex and plateau vortex can cause the mass exchange of the stratosphere-troposphere, and may be a new transport window for the troposphere-stratosphere atmospheric exchange.

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