On September 6, the China Meteorological Administration held a press conference.
Recently, the World Meteorological Organization said that the "three peaks" La Niña phenomenon may appear for the first time in this century. What impact will this have on China's weather and climate?
Xiao Chan, deputy director of the National Climate Center, said that statistics show that after the La Niña event, China's autumn precipitation is prone to the characteristics of "more north and less south", while the probability of low temperature in winter is high.
However, the influence of La Niña on the East Asian monsoon still has interdecadal changes. In addition to the influence of ENSO events, China's weather and climate will also be affected by other factors.
In addition, various indicators such as the intensity and spatial pattern of the La Niña event will cause the complexity of the relationship with China's weather and climate.
According to the existing meteorological observation records, although there are not many "Three Peaks" La Niña events, they have also occurred in history.
There should be no necessary connection between the three-peak La Niña event and the high temperature event. During the consecutive La Niña events from 1998 to 2001, there was no abnormally large-scale high temperature in summer in southern China.
This summer's high temperature occurred in the context of the La Niña event, especially the strengthening of cold water in the equatorial central Pacific since summer, which is conducive to the strengthening of the subtropical high in the western Pacific. The impact mechanism needs to be further studied.
(Dong Zeyu)
Responsible editor: [Ji Xiang]