Why is there such a serious freezing weather in Guizhou?

Guizhou Province, which has always been known as "no cold in winter and no heat in summer", where did the large-scale rain and snow weather come from this year?

"The annual meteorological trend forecast of Guizhou Province shows that 2008 is a cold winter, which is the conclusion drawn by the meteorological department through decades of data analysis." Meteorological bureau of guizhou province director Luo Ning said.

Luo Ning said that 2008 was a cold winter, and there are two scientific evidences: one is La Nina phenomenon, and the other is that this year is a low-value year of solar activity, resulting in relatively low temperature and rainy winter.

Zhang Wenjian, deputy director of China Meteorological Bureau, told reporters in Guizhou that the direct cause of the recent large-scale rain and snow weather is the abnormal atmospheric circulation. China is not alone in experiencing extreme rain and snow. At the end of last year and the beginning of this year, the United States, Canada and other North American countries all experienced snowstorms, which were related to La Nina incident.

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.

Li analyzed that the northern cold air mass that frequently went south after winter was blocked by the topography of Yunnan-Guizhou Plateau, forming the famous Yunnan-Guizhou static front over western Guizhou and eastern Yunnan, and controlling Guizhou for a long time. In addition, the warm and humid airflow from the Bay of Bengal continuously supplies abundant water vapor, which leads to frequent and long-lasting freezing rain in Guizhou.

According to the comprehensive analysis of the latest meteorological data, the weather in Guizhou will temporarily improve after February 2, and the severe snow condensation weather maintained in the central and eastern regions in the early stage will be greatly alleviated. During the day from 3rd to 4th, the temperature in the whole province will rise above zero degrees Celsius, but on the evening of 4th, affected by a cold air, the temperature in the whole province will drop. From 6th to 7th, most parts of the province turned from yin to yang, but there was still freezing in high altitude areas in the west.

Meteorologists suggest that to reduce the impact of snow and freezing rain, the main method at present is to rely on manual operation to eradicate or spray snow melting agent. At present, transportation, electric power, communications, civil affairs, urban water supply and other relevant departments should make full use of the favorable opportunity of the temporary improvement of weather in central and eastern Guizhou, pay close attention to emergency repair and disaster relief, and rush to transport materials; The condensation and melting of snow will cause the road surface to be slippery, so rescue and relief personnel should pay special attention to cold prevention and anti-skid; The geological department strengthens the inspection of hidden danger points of geological disasters to prevent landslides, collapses and other disasters caused by the condensation and melting of snow; When going out, citizens should pay attention to avoid walking on the edge of buildings to avoid hanging ice and falling from a height to hurt people; Pay attention to keep a good indoor ventilation environment to keep out the cold and avoid the occurrence of non-occupational carbon monoxide poisoning.