ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 43 Issue 8 > 2017,43(8):924-935. DOI:10.7519/j.issn.1000-0526.2017.08.003 Prev Next
Analysis on Rainstorm Caused by Central Asian Vortex in Northern Xinjiang
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Abstract:
Using conventional observation data, automatic weather station data, the high resolution model of ECMWF data, and FY2E TBB data, 1 km and FNL data, the reason for regional rainstorm in Northern Xinjiang in 20-21 June 2013 was analyzed and compared with the early analysis of rainstorm that had happened in Southern Xinjiang. The results showed that the Central Asian vortex was the main influencing system. The rainstorm was directly caused by in the middle and lower troposphere and the ground mesoscale system. Mesoγ convection system was monitored by both the cloud image and the automatic station wind field. Affected by the terrain of the Altai Mountains and Sharbasitao, the mesoscale low vortex and the cyclonic vortex along the piedmont from the southeast to the northwest at 850 hPa rotated, stranded and enhanced, making the divergence structure of lowlevel convergence and highlevel divergence formed and the strongest vertical upward movement at the same time enhanced rainstorm to increase. This heavy rain process was different from the heavy rain in Southern Xinjiang.
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