Why is it so cold in Guangxi this year?

Cold weather in Guangxi since 195 1 year. The low-temperature weather monitoring of Guangxi meteorological department showed that the average temperature in Guangxi was 7.0℃ from June 12 to 25, which was 3.9℃ lower than normal, ranking second in the same period since 195 1 year (No.Experts analyzed the main reasons for the snowstorm. The duration of snowfall in five provinces exceeds once in a hundred years. "The direct cause of the recent large-scale rain and snow weather is the abnormal atmospheric circulation." Sun Jun, chief forecaster of the Central Meteorological Observatory, said. Judging from the evolution of atmospheric circulation in the short and medium term, since the winter of this year, cold air has been frequent and warm and humid air currents have been active. In addition, the subtropical system is strong, northwest than normal, which is conducive to transporting warm and humid air from the south to the north. On the one hand, the cold air in the north is very active, and the warm and humid airflow in the south is constantly transported northward. The intersection of cold and warm air currents is mainly located in the central and eastern regions of China, which creates favorable circulation conditions for large-scale rain and snow weather. From the perspective of climate change, the current low temperature in the equatorial Middle East Pacific is one of La Nina's manifestations. Statistical analysis shows that the meridional dimension of mid-latitude atmospheric circulation may be strengthened in the winter of the year and the spring of the following year when the strong La Nina event occurred, that is, frequent cold air activities may easily lead to low temperature in most parts of northern and eastern China and more precipitation in the north of the Yangtze River.

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