Geography: Why is Asia high-pressure, dry and sunny?

The Asian high is also called the Mongolian high or the Siberian high. Mongolia-Siberia semi-permanent cold high pressure. It is a part of the polar high pressure belt, which is formed by the thermal difference between land and sea. Mongolia-Siberia is the coldest place in the northern hemisphere in winter, and the atmosphere contracts and sinks, forming the strongest and widest high pressure in the northern hemisphere. It is an integral part of the Asian monsoon circulation and the center of atmospheric activity in winter in the Asian continent.

The high pressure center is located in Siberia and Mongolia, moving eastward in spring and disappearing in midsummer. At the same height, the atmospheric vortex with the central air pressure higher than the surrounding air pressure is called "high pressure" or "high pressure" for short. Among them, the air flows from the center to the periphery and flows clockwise in the northern hemisphere under the influence of the earth's rotation. Flowing counterclockwise in the southern hemisphere. There is no front in the high pressure area, and there is a lot of downward airflow, so it is cloudy, rainy and windy locally. There are many sunny days.