TITLE:
Analysis of a Large-Scale Heavy Precipitation Weather Process in Northern China from September 17 to 20, 2021
AUTHORS:
Miao Hou
KEYWORDS:
North China, Precipitation, Vortex, Shear Line, Relative Humidity
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.10,
October
31,
2022
ABSTRACT: In the
autumn of 2021, China’s
precipitation appears the distribution characteristics of “more in the South and less
in the north”.
Compared with the same period in history, the precipitation is more. The
analysis is based on a large-scale heavy precipitation weather process in the
middle and late September. The atmospheric circulation situation and weather
situation of this precipitation process are mainly discussed. The results show that the
low-pressure trough between the Balkesh Lake and Baikal Lake area made the cold
air move eastward, and the warm and humid air flow extending westward was
conducive to the enhancement of precipitation. The anticyclone circulation in
the Sea of Japan transported the cold and humid air to the northeast of China.
The southeast air flow around the subtropical high in the Western Pacific, the
southwest air flow in the bay of the Bengal Bay and the South China Sea met in
the southwest to produce precipitation and continued to move northward. They
merged with the cold and humid air flow in the Northeast in the north of the
Yangtze River, resulting in large-scale precipitation in northern China.