Earth hits the record for the sixth hottest year on record in 2021, according to some newly published temperature measurements.
And scientists say that particularly hot year is part of a long-term warming trend that shows signs of accelerating.
Two scientific institutions of the United States—NASA and National Oceanic and Atmospheric Administration—And a private measurement group released their calculations for last year’s global temperature on Thursday, and all said it was not far behind the extremely hot 2016 and 2020.
Six different calculations were found in 2021 between Thursday and the seventh hottest year since the late 1800s. NASA says 2021 is tied with 2018 at the sixth warmest, while NOAA puts last year at sixth, ahead of 2018.
Scientists say a La Nina—Natural cooling of areas in the central Pacific changes weather patterns around the globe and brings icy deep sea water to the surface — global temperature drop is just as bad as it gets, El Nino, fueled them in 2016.
However, they say 2021 is the hottest La Nina year on record, and that year does not represent a reduction in anthropogenic heat. climate change but provide more heat.
“So it doesn’t quite dominate as the warmest on record, but give it a few more years and we’ll see another one,” said climate scientist Zeke Hausfather of Berkeley Earth The monitoring group also ranked 2021 hot sixth. “That’s the long-term trend and it’s an indomitable march upward.”
“The long-term trend is very, very clear,” said Gavin Schmidt, climate scientist who heads NASA’s temperature team. And it’s up to us. And it won’t go away until we stop increasing the amount of carbon dioxide in the atmosphere. “
NASA and NOAA data agree that the past eight years have been the eight hottest years on record. Their data shows that global temperatures, averaged over a 10-year period to exclude natural variation, are nearly 2 degrees (1.1 degrees Celsius) warmer than 140 years ago.
There was such a particular rise in temperature about eight to 10 years ago that scientists began to look at whether the rise in temperature was accelerating. Both Schmidt and Hausfather say early signs point to it, but it’s hard to know for sure.
“I think you can see that acceleration, but whether it’s statistically strong is not clear,” Schmidt said in an interview. “If you just look at the last 10 years, how many of those are above the trend line compared to 10 years ago? Almost all of them.”
The average global temperature last year was 58.5 degrees (14.7 degrees Celsius), according to NOAA. In 1988, then-NASA chief climate scientist James Hansen made headlines when he testified before Congress about global warming in the hottest year on record at the time. Now, the 57.7 degrees (14.3 degrees Celsius) of 1988 ranks as the 28th hottest year on record.
According to Berkeley Earth, 1.8 billion people in 25 countries in Asia, Africa and the Middle East had their hottest years on record last year, including China, Nigeria, Bangladesh, Iran, Myanmar and South Korea.
The deep ocean, which stores the most heat in the sea, also sets a record for warmth in 2021, according to a new newspaper. research.
“Ocean warming, in addition to causing coral bleaching and threatening marine life and fish populations on which we rely for about 25% of global protein, is destabilizing determine the Antarctic ice shelves and threaten… sea level rise if we don’t act,” said study co-author Michael Mann, a climate scientist at Pennsylvania State University.
The last time Earth had a colder-than-normal year as calculated by NOAA or NASA was 1976. That means 69% of people on the planet — more than 5 billion people under 45 — have never experienced a year. so, based on United Nations data.
North Carolina state climatologist Kathie Dello, 39, who was not included in the new reports but thinks they make sense, said: “I just live in a warming world and I wish the younger generations weren’t. must say so. . It doesn’t have to be this way. “
https://time.com/6139097/nasa-climate-2021-record-warm/ Earth hits record 6th in warmest year, new NASA data