Causes and harm of low temperature, rain, snow and freezing weather

Reason: The main culprit of a wide range of freezing rain, snow and ice weather is "polar vortex". It has three characteristics: large scale, strong strength and south location. Large scale means a large range of influence, which is easier to maintain stably; Strong intensity means that the air pressure in the center of the low-pressure vortex is low, so the accompanying cold air is strong, windy and low in temperature; The location to the south means the most prosperous time, and its center is located in the Bohai Sea. Therefore, cold air will affect the southern region, and South China and South China Sea will be affected by strong cold air.

Harm: First, agricultural production reduction: fruits, vegetables, facility agriculture and aquaculture will all be affected, and the cost of facility agriculture will also increase. Second, infrastructure such as electricity and transportation is in jeopardy. The third is to affect traffic safety.