Comparative Analysis of Structural Characteritics of Two Typhoons Landing in Shanghai in 2018
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Abstract:
Based on the regular weather data, radar data and NCEP 1°×1° reanalysis data, the rainstorms occurred in Shanghai and Zhejiang Coast produced by typhoon Jongdari (1812) and typhoon Rumbia (1818) are comparatively analyzed. The results show: (1) Jongdari was guided by the easterly wind of the south subtropical high and the precipitation is concentrated on the south side. Rumbia was guided by the easterly wind of the south continental high and the precipitation evenly distributes on both sides. The rainstorm of Rumbia was wider than that of Jongdari, but the center is weaker. (2) At the late period of Jongdari, cold air intruded from the Hangzhou Bay which increased atmospheric convective instability and made precipitation increase again. The atmosphere was in a weak convective instability state at the late period of Rumbia, whose precipitation weakened gradually. (3) The water vapor distribution on both sides of Rumbia was even, and the water vapor flux was greater in range and more intensive than that of Jongdari, whose convergence height in vertical direction reached up to the upper troposphere. (4) The rainstorm center of Jongdari was located in the east wind of the southern South Asian high, which was conducive to the strengthening of highlevel divergence and strong precipitation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.