What is the relationship between climate change of El Nino and La Nina and global warming?

The name El Nino (meaning "El Nino" in Spanish) originated from fishermen along the coast of Peru at the end of 19, which refers to the seasonal invasion of warm ocean currents flowing southward, replacing the cold ocean currents flowing northward when they used to fish. This phenomenon usually happens around Christmas. Nowadays, El Nino no longer refers to the seasonal variation of local ocean currents, but refers to a part of ENSO phenomenon. El Nino/Southern Oscillation (ENSO) refers to the persistent but irregular atmospheric and ocean circulation phenomenon that affects the whole world. El Nino refers to the abnormal warming of the ocean surface in the Middle East and the Pacific Ocean and its interaction with the lower atmosphere, which can have a significant weather impact. Accordingly, since 1985, the phenomenon of abnormal sea surface cooling in the Middle East and Pacific Ocean is called "La Nina" (little girl). It takes about four years for El Nino and La Nina to transform into each other.

El Nino means "child" in Spanish. El Nino is a phenomenon that leads to an abnormal rise in sea surface temperature around Christmas in the cold ocean current area on the west coast of the United States. It is like a "warm pool", which changes the atmospheric heating field through the change of surface temperature, thus bringing changes to the weather in various places, causing floods in the original dry and rainy places, while the rainy places are prone to long-term drought and lack of rain.

From the position of main rain belts in China from June to August, 75% of the rain belts are located in the Yangtze River and Huaihe River basins in El Ni? o year and summer. Figuratively speaking, the low-frequency oscillation of tropical atmospheric circulation can be compared to tropical heartbeat. The occurrence of El Nino events is like a heart attack in the tropics, which makes the regular low-frequency oscillation abnormal.

When the above El Nino phenomenon occurred, it spread all over the central, eastern and Pacific oceans, and the positive anomaly of surface water temperature was as high as 3℃ or above. The strong rise in seawater temperature has led to a great decrease in plankton in the water, which has hit Peru's fishery production and led to floods or droughts in Ecuador and other equatorial Pacific regions. This El Nino phenomenon is called El Nino event. It is generally believed that the sea surface temperature anomaly for three consecutive months is above 0.5℃, which can be considered as an El Ni? o event. On the contrary, if the negative sea surface temperature anomaly along the coast of South America is above 0.5℃ for three consecutive months, it is considered as an anti-El Ni? o event, also known as La Ni? a event. At present, according to the research of meteorologists, it is generally believed that the occurrence of El Ni? o event is a harbinger of climate disasters in many parts of the world, so its monitoring has become an important content in climate monitoring.

According to historical records, since 1950, there have been 13 El Nino phenomena all over the world. The one that happened in 1997 and continues to this day is the most serious. Mainly manifested in: from the northern hemisphere to the southern hemisphere, from Africa to Latin America, the climate has become weird and incredible. A cool place is like a fire. It suddenly snows in warm spring, but it doesn't rain when the rainy season comes, but floods in dry season. .....

Scientists believe that the occurrence of El Nino phenomenon is related to the deterioration of human natural environment, the direct result of the intensification of global greenhouse effect, and the result of human beings demanding too much from nature and not paying attention to environmental protection.

(The above article is from /art/dlmy/cdlzs/dc0303.htm)