Features of Triple dip La Nina
Triple dip La Nina is a part of the global climatic cycle that occurs when the temperature above the Pacific Ocean changes, leading to unusual wind patterns, ocean currents, and climatic behavior. Various features of triple dip La Nina are identified by scientists that contribute to the largest natural effects on climate, which are mentioned as follows:
- The Sea Surface temperature originates when cooler than usual ocean temperatures occur in the equatorial regions. La Nina causes a decrease in sea-surface temperature by more than 0.5 degrees Celsius for at least five successive three-month seasons.
- Pressure: It contains low air surface pressure in the eastern Pacific areas.
- Trade winds: It makes the trade winds blow with more pressure and force.
- Seasons: The northwest of the pacific observes above-average precipitation in winter seasons and the southwest of the pacific experiences a dry climate and below-average rainfall.
- Ocean waters in the Pacific: Cold water causes reduced precipitation, increasing drought occurrence in certain parts.
- Cyclones: It increases the chances of intense tropical cyclones as wind direction changes rapidly.
Triple Dip La Nina
La Nina (‘Little Girl‘ in Spanish) is a natural and periodic weather pattern that occurs due to fluctuating ocean temperatures in one particular part of the world, namely the east-central equatorial Pacific Ocean. It is the cyclic process of cooling sea surface temperature in the central and eastern Pacific Oceans situated in the equatorial region. This cooling effect results in unique patterns of tropical wind circulation, atmospheric pressure, and rainfall, causing significant changes in weather and climate. The unusual cooling of seawater causes less water evaporation so the air above becomes dryer, cooler, and denser.
This dense air doesn’t develop into storms and causes less rainfall in certain parts of the world and more rainfall in other parts. This natural event typically occurs in a cycle of five to seven years and lasts for about three years. That is why it is called triple-dip La Nina. La Nina gives rise to stronger ocean winds that intensify during July and August, affecting temperature and rainfall patterns. This leads to storms, drought, and flood-like situations.
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