TITLE:
Analysis of Rainfall Weather Process in Most of China from 3-6 October, 2021
AUTHORS:
Yifei Liu
KEYWORDS:
Rainfall Weather Process, Subtropical High, Warm and Wet Flow, Cold Vortex, Low-Level Shear Line
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.11,
November
28,
2022
ABSTRACT: Heavy rain is a common abnormal weather in China, which is prone to major natural disasters such as floods. By using China National Climate Center’s DERF2.0 (the second-generation product of monthly dynamic extended ensemble prediction) models and NCEP (National Centers for Environmental Prediction) data, and using synoptic and dynamic methods and other research methods, the rainfall weather process in most of China from October 3-6, 2021 isanalyzed. The results show that: 1) this process had a long duration, large cumulative rainfall and strong extreme. 2) The warm and wet flow and the cold air intersected in the central and western regions of China and Northeast China, which resulted in a regional rainstorm process within ten days. 3) There was a low-level jet moving from Guizhou and Hunan to the south of Northeast China, bringing a lot of water vapor. To sum up, the rainfall process of this round has a certain relationship with the adjustment of atmospheric circulation.