La Nina is expected to persist until May before disappearing

La Nina could linger for at least another four months before the phenomenon begins to fade.

La Nina could persist for at least four more months before the phenomenon blamed on South American droughts, milder weather in the southern United States and heavy rains in the Pacific Northwest begins to fade. . There is a 57% chance that La Nina will disappear by July as ocean temperatures in the equatorial Pacific approach normal, according to the US Climate Prediction Center. Until then, the event marked by cooler waters in parts of the Pacific will likely continue through at least May.

This is the second year in a row that La Nina has established itself around the world. Of the 12 La Ninas that have developed since 1950, eight have turned into “double-dip” events, according to a blog post by Climate Prediction Center scientist Emily Becker. Two even lasted until a third year.

There is a 30% chance of La Nina returning between August and October, although the reliability of these forecasts is lower in the Northern Hemisphere spring – a period forecasters call the “spring barrier”.

Last year was the world’s sixth hottest on record – US scientists

(Reuters) – Last year was the sixth-hottest year on record, causing extreme weather events around the world and adding evidence to support long-term global warming, according to a analysis carried out Thursday by two US government agencies.

Data compiled by the U.S. National Oceanic and Atmospheric Administration (NOAA) and NASA also revealed that the past eight years have been the eight hottest, and the past decade has been the hottest since the start of the record. records in 1880, officials said.

Global warming is “very real. It’s now, and it’s impacting real people,” Gavin Schmidt, director of NASA’s Goddard Institute for Space Studies, said in an interview. Last year’s extreme heat wave in the US Pacific Northwest, intense rains from Hurricane Ida and flooding in Germany and China were linked to global warming, he said. .

A key indicator of climate change, the heat content of the world’s oceans, hit an all-time high in 2021, the agencies said. The oceans absorb more than 90% of the excess heat trapped in the Earth’s atmosphere by greenhouse gases, and these warmer waters influence weather patterns and changes in currents.

“What’s scientifically interesting about this is that it tells us why the planet is getting warmer,” Schmidt said. “It’s getting warmer because of our impacts on greenhouse gas concentrations.”

According to NOAA, average temperatures for 2021 were 1.51 degrees Fahrenheit (0.84 Celsius) above the 20th century average, putting it just ahead of 2018. NASA’s analysis, which uses a 30-year reference period, showed that 2021 temperatures were tied to 2018 as the sixth-warmest year.

The greatest warming has occurred in the Northern Hemisphere, both on land and in the Arctic. The Arctic is warming more than three times faster than the global average, the agencies said.

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