Chongming Island is less affected by the cold wave?

The area less affected by the cold wave is Chongming Island. Chongming Island is affected by strong cold air. This morning, the wind in this area gradually increased. The northwest wind, the largest gust in the inland is 7, and the Yangtze River estuary is 8-9. Strong cold air began to affect this area, and the temperature dropped significantly. It is estimated that the lowest temperature in Chongming will be-1℃ in the next two days, and there will be thin ice in some areas.

Formation of cold wave

Located in the Arctic and Siberia at high latitudes, the ground receives little solar radiation due to the oblique sunlight all the year round. In winter, the temperature in the Arctic Ocean is often below -20℃, and the lowest can reach -70℃~-60℃. The monthly average temperature of 65438+ 10 is often lower than -40℃.

Low temperature greatly increases the density of the atmosphere, and the air shrinks and sinks continuously, which increases the air pressure, thus forming a strong, deep and broad cold and high-pressure air mass. When this cold and high-pressure force is enhanced to a certain extent, it will flood into the territory of China where the southeast air pressure is relatively low, forming a cold wave.