El Ni o, El Ni o

El Niño is the product of the interaction between the tropical atmosphere and the ocean, which originally referred to an anomalous warming of the equatorial sea, and is now defined as a climate anomaly caused by the interaction of air and sea on a global scale. El Niño is an example of a strongly coupled event that occurs between atmospheric circulation and oceanic circulation. The stress exerted by atmospheric circulation (wind) on the ocean is the main driver of ocean circulation, and at the same time, as we have seen, heat from the ocean, especially evaporation, has a great influence on atmospheric circulation.

El Niño's simplified model shows the role of different fluctuations in the propagation of energy through the ocean. In this simplified model, fluctuations in the ocean, known as rossby waves, propagate westward from an unusually warm sea near the equator. When it reaches the western boundary of the ocean, it is reflected into a different wave, called a Kelvin wave, which travels eastward, which plays the role of canceling out or changing the original warm SST anomaly symbol and triggering a cooling event.

The time required for this half-cycle throughout an El Niño event is determined by the speed at which these waves propagate, and it takes about 2 years.

El Niño is a phenomenon in which the waters of the eastern Pacific Ocean warm abnormally every few years.

The El Niño Warm Current is an anomalous natural phenomenon in the Pacific Ocean, which is associated with the warm ocean currents generated at the equator in the central and eastern Pacific Oceans (about 120 degrees west of the date line and longitude west). When El Niño occurs, heavy rains occur in South America, while drought conditions occur in Southeast Asia and Australia.

El Niño

El Niño Warm Current, is an abnormal natural phenomenon in the Pacific Ocean, in the west coast of South America, the eastern part of the South Pacific, from south to north flow a famous Peruvian cold current, every year from November to March of the following year is the summer of the Southern Hemisphere, the water temperature in the southern hemisphere generally rises, and the equatorial warm current flowing westward is strengthened.

At this time, the pressure and wind belts of the world move southward, and the northeast trade winds cross the equator and are deflected to the left by the Southern Hemisphere self-deflecting force, also known as the geostrophic deflection force. The northwest monsoon not only weakens the offshore winds on the west coast of Peru and weakens or even disappears the cold water of Peru, but also blows the warm equatorial current with higher water temperature southward, causing the water temperature of the cold current in Peru to rise abnormally.

The above content reference:Encyclopedia – El Niño Warm Current

The so-called El Niño phenomenon refers to the abnormal warming of sea temperatures in the eastern and central Pacific Oceans.

The apparent cause of El Niño is the weakening of the southeast trade winds and the change in the Earth's rotation speed. From the perspective of the southeast trade winds, when the southeast trade winds weaken, the cold water rising on the seabed will also weaken, and in this case, the normal flow of warm currents at the south equator will cause the sea water in this area to not be reconciled by the cold water in the upper flood, resulting in an abnormally warm sea temperature.

The impact of El Niño

El Niño affects the global climate. In the Pacific region, the rainy areas in the western tropical Pacific region have moved eastward with the change of ocean temperature, which has directly led to drought in Indonesia, Australia, and India, and abnormally heavy rainfall in the Pacific rim countries of the Central Pacific and South America, and even caused floods and other disasters.

El Niño not only alters the atmosphere over the entire tropical Pacific Ocean, but also affects other parts of the tropics, and even causes climate anomalies outside the tropics. Studies have also linked El Niño to drought in southeastern Africa and northeastern Brazil; It also has a significant impact on Atlantic hurricanes, and the number of Atlantic hurricane days in El Niño years has decreased significantly; It also has an impact on the activity of typhoons in the western Pacific.

El Niño, also known as El Niño currents, is a climate phenomenon that occurs when the ocean and atmosphere interact over a large area of the Pacific equatorial zone and become out of balance.

Normally, the monsoon currents in the tropical Pacific region move from the Americas to Asia, keeping the Pacific surface warm and bringing tropical rainfall around Indonesia. But this pattern is disrupted every 2 to 7 years, reversing the direction of winds and ocean currents, and the heat flow from the surface of the Pacific Ocean turns eastward towards the Americas, taking with it tropical rainfall and creating the so-called "El Niño".

In the eastern part of our country, the climate conditions under normal circumstances should be: high temperature and rain in summer, low temperature and little rain in winter. And when El Niño occurs:

1. In summer, the main rain belt is southern, and most of the north has little rain and drought.

2. The rainy season in the middle and lower reaches of the Yangtze River is mostly postponed.

3. In autumn, the eastern part of our country has more precipitation in the south and less in the north, which is easy to cause drought in summer and autumn in the north.

4. Most of the country is warm in winter and cool in summer.

5. There are fewer typhoons that make landfall in China.

El Ni O (Spanish) Ninophenomenon, also known as the Holy Child Phenomenon, is a transliteration of the Spanish "ei nino". One climatic phenomenon that occurs in the tropical Pacific Ocean with abnormal SST warming, together with another phenomenon, the Southern Oscillation, is called ENSO. El Niño is a phenomenon that occurs in the ocean, and its distinctive feature is the abnormal warming of the sea in the eastern and central equatorial Pacific Oceans.

El Niño is the result of an unstable interaction between the ocean and the atmosphere. According to statistics, every strong El Niño event will lead to global climate anomalies, resulting in huge economic losses. [1] Although the El Niño phenomenon occurs in the eastern Pacific Ocean, which is relatively far away from the Central Circle, and does not have a strong direct impact on China's weather and climate, it still affects China through changes in atmospheric circulation.

1997 was a year of strong El Niño, and its strong influence continued until the first half of 1998, when China suffered a devastating flood in 98 years, and El Niño was one of the most important influencing factors. [2] Look at the situation in China.

El Niño (Spanish: el ni o), also known as the phenomenon of the Holy Child, together with another phenomenon, the Southern Oscillation, is called ENSO. It is a term used by fishermen in Peru and Ecuador to refer to an abnormal climatic phenomenon.

It refers mainly to the unusually continuous warming of sea temperatures in the tropical oceans of the eastern and central Pacific Oceans, which has caused changes in the climate patterns of the world as a whole, resulting in drought in some areas and excessive rainfall in others.

At the beginning of the 19th century, fishermen in Spanish-speaking countries such as Ecuador and Peru in South America discovered that every few years, from October to March, a warm current moving south along the coast caused a significant increase in surface water temperatures. The Peruvian Snap was one of the four largest in the world due to the cold current that prevailed on the eastern coast of the Pacific Ocean in South America, but as soon as this warm current appeared, a large number of cold-water fish died, causing fishermen to suffer a catastrophe.