The reason why the Sanjiang Plain is rainy in summer and autumn and why there are strong winds in winter and spring in the Soviet Union

The rainfall area formed by the Intertropical Convergence Zone moves to the vicinity of the Sanjiang Plain in summer and autumn every year, resulting in rainy weather.

The Sanjiang Plain still belongs to the monsoon area, passing through the Greater and Lesser Khingan Mountains The Siberian region in Russia (the former Soviet Union) to the west and north has a temperate continental climate.

Since the summer monsoon cannot enter Siberia, Siberia has long been controlled by the dry air masses of the Eurasian continent. As a result, in winter and spring, it is frequently affected by the cold air gathered from the Eurasian continent to form cold gales. In late spring and early summer, the dry air mass Continental air masses raise dust from the ground to form large-scale sandstorms.