How does the weather forecast predict warm current?

How to forecast warm current in weather forecast generally refers to El Nino warm current.

El Nino Warm Current The sea water temperature in the tropical ocean in the eastern and central Pacific Ocean is abnormal and keeps warming, which changes the global climate pattern, resulting in drought in some areas and excessive rainfall in others. Its frequency is irregular, but it happens once every four years on average.

Basically, if this phenomenon lasts less than five months, it will be called El Nino phenomenon; If it lasts for five months or more, it will be called an El Nino event.

Under normal circumstances, the monsoon air flow in the tropical Pacific moves from America to Asia, keeping the surface of the Pacific Ocean warm and bringing tropical rainfall around Indonesia.

However, this pattern is disrupted every two to seven years, and the wind direction and ocean currents are reversed. The heat flow in the surface layer of the Pacific Ocean turns eastward to America, and then takes away tropical rainfall, resulting in a large area of drought on the earth. This is the "El Nino phenomenon".

The cause of the El Nino phenomenon is still inconclusive in the world. At present, there are roughly three views:

One is that El Nino phenomenon is caused by periodic changes of atmospheric or ocean movements;

Secondly, the El Nino phenomenon has a corresponding relationship with the change of the earth's rotation speed;

Thirdly, it is believed that El Nino phenomenon is related to the activities of the Pacific submarine crust, such as volcanoes and earthquakes. In addition, it has been pointed out that the El Ni? o phenomenon has a certain relationship with the greenhouse effect.