What is the La Nina phenomenon?

<p style=";text-align:left;direction:ltr">The La Niña phenomenon is a climatic phenomenon that occurs in the Pacific Ocean. It is represented by a decrease in the surface temperature of the waters in the central and eastern region of the Pacific Ocean.</p><p style=";text-align:left;direction:ltr"> La Niña causes atmospheric and climatic changes in different regions all over the world. And lead to excessive precipitation in some regions such as Southeast Asia and East Africa, while some regions such as southern Brazil, Australia and parts of Central Asia and the South Pacific are experiencing drought and high temperatures.</p><p style=";text-align:left;direction:ltr"> La Niña occurs infrequently, and its strength is determined by measuring surface water temperatures in El Niño 3.4, a region in the central and eastern Pacific Ocean. La Niña usually lasts for a few months to two years, then temperatures return to normal.</p>