La Nina's influence

A: There are frequent cold waves and cold air activities affecting China, and the temperature in the central and eastern regions is easy to be lower than normal.

La Nina phenomenon is simply that the sea surface temperature in the equatorial Middle East and Pacific Ocean is extremely cold; The "El Nino" phenomenon that we often heard before is that the sea surface water temperature continues to be higher than normal. Both of these phenomena are important factors that may lead to global climate anomalies.

La Nina refers to the phenomenon that the sea water in the equator, the Middle East and the Pacific Ocean is unusually cold in a large range, which is just the opposite of El Ni? o, so La Nina is also called "cold event" or "anti-El Ni? o event". When the temperature in this sea area, which is tens of thousands of kilometers long from east to west and thousands of kilometers wide from north to south, is 0.5℃ lower than the annual average, this sea area will enter the "La Nina" state and last for more than 6 months, thus forming the "La Nina" event.