TITLE:
Analysis of Cold Air and Precipitation in Central and Eastern China, 2-5 October, 2022
AUTHORS:
Ming Shi
KEYWORDS:
Meteorological, Method, Precipitation, Cold Wave, Cold Air
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.7,
July
25,
2023
ABSTRACT: This paper used potential height field data
published by the China National Climate Center and the US NCEP reanalysis data. A study was conducted on a
strong cold wave weather process in central and eastern China from October 2 to 5, 2022. The results show that this
weather process is a cold air weather process of “horizontal trough to
vertical” type from the east of Novaya Zemlya Island. Cold air passes through
Russia and Mongolia south, controlling northern
China. The precipitation process is caused by the combination of high-altitude trough, ground front, warm and humid air flow, and precipitation
weather formed by the influence of warm and humid air due to the 700 hPa shear
line. The northern Sichuan Basin and the middle and lower reaches of the Yellow
River in China can precipitate almost 50 mm. Water vapor is transported from the South China Sea to central and
eastern China by the southwest warm and humid air flow along the west
side of the West Pacific Subtropical High. Water vapor is
concentrated over the precipitation area through horizontal
convergence and is the most important source of water vapor causing
precipitation.