In November 2021, Northeast China had more precipitation than in the same period. Among them, Heilongjiang and Jilin provinces in the
Northeast China were the highest precipitation in the same period. I
study a snowfall weather process
from November 5 to 9, which mainly includes dynamic situation, synoptic background and situation.
The results show that: In the middle andhigh latitudes of Eurasia, circulation is adjusted from zonal to meridional with large fluctuations. The northerly wind behind
the trough continuously transports the polar cold air to the south. The
northwest airflow behind the trough led the cold air to erupt to the southeast. In the
process of moving southward, the cold air meets the warm and humid air
in front of the trough, causing snowfall in the northeast. The southerly
airflow and southeasterly airflow on
the east side of the vortex continued to transport warm and humid airflow from
the Yellow Sea and the Sea of Japan, which enhanced the snowfall.
References
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