Comparative Analysis of the Precipitation Difference Between Sanya Airport and Haikou Airport Caused by Typhoon 2117

DOI: https://doi.org/10.62517/jes.202302101

Author(s)

Chen Qiuzhen1, Xu Jiaao2, Dong Juemin1, Ou Zixian1

Affiliation(s)

1Sanya Air Traffic Management Station, Sanya, Hainan, China 2Xiapu Meteorological Bureau, Ningde, Fujian, China

Abstract

By using ECMWF and FNI reanalysis data, airport self-observation precipitation data, satellite TBB data, and precipitation distribution data of Hainan Meteorological Bureau, the rainfall characteristics of Sanya Phoenix Airport and Haikou Meilan Airport on the day of Typhoon Lionrock on the 17th, autumn 2021 were analyzed. The results found that: (1) The lifting effect of the terrain and the invasion of weak cold air intensified the intensity of the rainstorm in Hainan. The rainstorm center was located on the windward slope of Wuzhishan Mountain. Fenghuang Airport was in the leeward slope environment, while Meilan Airport was in the windward slope. (2) The convergence of southerly air flow and southeast air flow and the abundant water vapor brought by the dynamic action of upper low-level jet stream are favorable conditions for triggering and maintaining heavy rain. (3) There was a negative correlation between heavy precipitation and brightening temperature of black body. The direct influence system of this weather process was mesoscale convective cloud cluster. (4) The rainstorm occurs in the area of dense θse line, which is conducive to the development of inclined vorticity. (5) The positive vertical helicity of 850hpa is a good indicator of precipitation in the next 6 hours.

Keywords

A Typhoon; A Rainstorm; Circulation Pattern; Vertical Velocity; Water Vapor Condition; Helicity

References

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