Another El Niño on the horizon? | 12/9/2018 | EarthSky
blackyblacky (Posted by) Level 3
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The European Space Agency (ESA) posted the video above on December 7, 2018, in response to an El Niño / La Niña update on November 27 from the World Meteorological Organization (WMO). The WMO said in late November there is a “75–80% chance” that a fully-fledged El Niño event will be with us by February, 2019; however, it is not expected to be a strong event. WMO reported:

Sea surface temperatures are already at weak El Niño levels in part of the tropical Pacific, although the corresponding atmospheric patterns have not yet materialized.

ESA - Opportunity - Explanatory - Video - El

ESA took the opportunity to post the explanatory video above, which describes El Niño and its cooler cousin, La Niña, as opposite phases of what is known as the El Niño-Southern Oscillation. They are complex, naturally occurring climatic phenomena, occurring at irregular intervals of between two and seven years. explained:

As the animation above shows, the first signs of an El Niño are a weakening of the trade winds and warmer-than-usual sea-surface temperatures in the eastern tropical Pacific Ocean. This not only affects fisheries off the coast of South America, but leads to a disruption in weather patterns around the world.

Weather - Patterns - Heatwaves - Drought - Wildfires

These changing weather patterns can cause heatwaves, drought, wildfires and flooding in different places.

But, again, the coming El Niño is expected to be on the weak side, unlike the 1997–98 El Niño event, which was regarded as one of the strongest El Niño events in recorded history, resulting in widespread drought, flooding and other natural disasters occurring across the globe. The 2015-16 El Niño event was also a very strong one. As for the coming event, the WMO said:

Sea - Surface - Temperatures - Pacific - El

Sea surface temperatures in the east-central tropical Pacific have been at weak El Niño levels since October, 2018. However, the atmosphere has not yet responded to this additional warmth, and the upper...
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