[ad_1]
IBS Research Group on Climate Physics
"The cyclical phenomenon of abnormal elevation of water temperature in the Pacific
The reasons that appear in various forms each time are
"
NASA Satellite Image of the Pacific Ocean at NASA end of 2015, date when the previous era of El Nino came in. Photo data
The badysis is based on the interaction between the eastern Pacific El Nino (EP El Niño) and Central El Nino Pyongyang (El Niño CP).
A research team of 40 researchers from 11 countries, including Professor Axel Timmerman of the Institute of Basic Sciences (IBS) on the 26th, said: "Mechanisms of the onset of the El Niño of the Eastern Pacific and Central Pyongyang El Niño, We have established a theoretical framework to explain the differences and have demonstrated them through mathematical modeling. "The article in the research team was published in the online edition of Science Journal, 25th (local time), as the first author and correspondent.
El Niño refers to a phenomenon in which seawater is warming abnormally from the central equatorial Pacific to the eastern region. Although El Niño attracts attention as a major cause of many meteorological disasters due to extreme weather and extreme weather conditions, it has difficulty predicting long-term weather due to its irregular diversity each time as the pace, cycle, intensity and duration Through an integrated approach to various climate observations, theoretical models and simulations, the team found mechanisms for the expression of various El Niños from the eastern Pacific and central Pyongyang according to ocean-atmosphere coupling conditions.
A schematic diagram of the El Niño phenomenon transformed into a La Niña phenomenon and the repeated El Niño phenomenon.
El Niño in the eastern Pacific is formed primarily when the upper floor of the Pacific Ocean is stored at high temperatures and the trade winds are weak. cold seawater in the lower layer weakens on the superficial layer, and the mechanism for increasing the temperature of the sea surface is the most important. On the other hand, the center of Pyongyang El Niño is mainly encountered when the upper floor of the ocean is relatively small and the trade wind is strong in the space of two to three years.
Axel Timmerman
The team can simulate two El Niños as pendulums with different cycles and strengths, resulting in different forms of El Niño as both El Niños combine Respectively In addition, it confirms that the characteristics of El Niño become complicated due to the complex interaction of the eastern Pacific and El Niño with external stimuli such as the surface temperature of the Atlantic oceans and Indian, global warming and tropical cyclones. Using a simple mathematical model, it has also been proven that specific El Niño can be better expressed by various forms of the marine-atmosphere coupling system of the Pacific Ocean. For example, in the El Niño of the eastern Pacific Ocean, when the thermal energy of the upper ocean moves mainly vertically, the center of Pyongyang El Niño is more likely to occur when the thermal energy moves mainly horizontally.
The team's mathematical equations predict the El Niño phenomenon, which can serve as a theoretical basis for many damage caused by droughts, floods, heavy rains and snowfalls, as well as food shortages , to the depletion of drinking water and infectious diseases. I am impatient of. Timmerman said, "We have begun research to develop an integrated theory model capable of simultaneously accounting for the spatial and temporal diversity of El Niño. In the future, I will reveal the mechanism of control of the spatial distribution and duration of La Niña and consider studying the predictability of La Niña and its overall impact. "
Lee, Geun Young Senior Reporter [email protected]
[ad_2]
Source link
