202 1 what are the reasons for the abnormal climate?

The fundamental reason is that global warming has aggravated the instability of the climate system. Global warming will change the global atmospheric circulation situation and affect the local climate through the interaction between ocean and atmosphere, land and atmosphere. Global warming causes extreme weather and climate events such as rainstorm, flood, drought, typhoon, high-temperature heat wave, cold wave and sandstorm to occur frequently in some areas, and their intensity is enhanced. The near-surface northerly wind caused by cold vortex causes the wind direction to reverse, and the near-surface northerly wind is beneficial to the rise of warm and humid air flow.

Climate:

Climate, a natural science term, refers to the multi-year average state of the atmosphere in a region. The main climatic factors include light, temperature and precipitation, of which precipitation is an important factor. The climate types in China are: tropical monsoon climate, subtropical monsoon climate and temperate monsoon climate? Temperate continental climate, alpine plateau climate.