Analysis on the formation mechanism of heavy precipitation in Liaoning Province caused by northward-moving tropical cyclone "Bavi"

• Published in: 暴雨灾害 Vol. 42; no. 2; pp. 150 - 159
• Main Authors: Shuo LIU, Jindan WANG, Qi YAN, Ping LI, Li TIAN, Zhenghua TAN, Han SAI
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Torrential Rain and Disasters 01.04.2023
• Subjects: frontogenesis; heavy precipitation; moist symmetric instability; tropical cyclone bavi
• ISSN: 2097-2164
• DOI: 10.12406/byzh.2022-106

The precipitation characteristics and the formation mechanism of heavy precipitation in Liaoning Province in different stages caused by the northward-moving tropical cyclone (TC) "Bavi", are analyzed based on the routine observations, the Doppler radar data, the tropical cyclone data from the Central Meteorological Observatory, the numerical model prediction data, and the global reanalysis data. The results are shown below. (1) The heavy precipitation in Liaoning Province can be divided into three stages: the stage of long-distance influence by the TC, the stage of outer spiral rainband influence by the TC, and the stage of TC body influence. In the first two stages, convective heavy precipitation occurred in Liaoning Province. In the second stage, the convective intensity was weaker than that in the first stage, while in the third stage, stable precipitation occurred in Liaoning Province with weak intensity. (2) The northward movement of TC "Bavi" provided continuous transport of water vapor and energy for p