Moderate intensity El Nino phenomenon

The highest sea surface temperature is above 1.3 degrees, and the temperature below 2 degrees is a moderate intensity El Ni? o phenomenon.

El Nino is a phenomenon that occurs in the ocean, and its notable feature is the abnormal warming of seawater in the eastern and central equatorial Pacific. Because tropical marine areas receive more solar radiation, the seawater temperature is correspondingly higher.

In the tropical Pacific Ocean, the equatorial current flows from the eastern Pacific Ocean to the western Pacific Ocean due to the traction of the east equatorial trade wind, which makes the high warm current in the western Pacific Ocean accumulate continuously and become the highest sea surface temperature in the world, with the sea surface temperature above 29℃. On the contrary, the SST in the equatorial eastern Pacific is relatively low, generally 23 ~ 24℃. Due to the distribution characteristics of sea surface temperature field, the tropical western Pacific presents updraft and low pressure.

The criterion of El Nino is that the sea surface temperature in the equatorial, middle east and Pacific ocean is high. According to China's scientific standards, the maximum value of El Nino events is above 0.5 degrees and below 1.3 degrees, which is a weak El Nino; 1.3 degrees and below 2 degrees are moderate El Nino; Strong El Nino is greater than or equal to 2 degrees, and super El Nino is greater than or equal to 2.5 degrees.

The development history of El Nino phenomenon

On May 3, 2023, the World Meteorological Organization released the latest assessment report, saying that the possibility of El Ni? o phenomenon at the end of 2023 is increasing. In many parts of the world, this will have an opposite effect on weather and climate patterns to the long-term La Nina phenomenon, and may lead to an increase in global temperature.

Since June 2023, the sea surface temperature in the equatorial Middle East Pacific Ocean has obviously increased and entered the El Ni? o state. According to the forecast of the National Climate Center, the equatorial Middle East and the Pacific Ocean will maintain the El Ni? o state in the next three months, and the SST index will continue to rise. In the autumn of 2023, an eastern El Ni? o event with moderate intensity or above will be formed.

In September, 2023, according to the forecast of the National Climate Center, the equatorial Middle East Pacific Ocean was still in El Nino state. It is predicted that there will be a moderate-intensity eastern El Ni? o event in the autumn of 2023, and the peak may appear in June 10 to February 12.

On September 25, 2023, according to local media reports in Peru, experts predicted that by the beginning of 2024, El Ni? o would cause huge losses to Peru's public and private infrastructure.

Baidu Encyclopedia-El Nino Warm Current