The fever continues: Earth celebrates its sixth warmest year on record | Chicago News

Vivek Shandas, a professor of climate adaptation at Portland State University, will measure temperatures near 106 degrees Celsius in downtown Portland, Oregon, on August 12, 2021. (NathanHoward / AP photo, file)

According to several newly announced temperature measurements, the Earth boiled in 2021 in the sixth hottest year on record.

And scientists say that very hot years are part of a long-term warming trend that shows signs of acceleration.

Two U.S. scientific institutions (NASA and the U.S. Marine and Atmospheric Administration) and a private measurement group released last year’s global temperature calculations on Thursday, stating that they are all not too late for the 2016 and 2020 ultra-high temperatures. I did.

Six different calculations show that 2021 is the hottest year from the late 1800s to the 5th to 7th years. According to NASA, 2021 is the sixth warmest in 2018, and NOAA ranked sixth last year, ahead of 2018.

Scientists say the La Nina phenomenon, a natural cooling of part of the Central Pacific that changes meteorological patterns globally and brings cold deep sea water to the surface, was pushed up by El Nino behind it in 2016. It is said that the temperature of the earth has been lowered in the same way as.

Still, they said 2021 was the hottest year of La Niña on record, and that year did not represent the cooling of anthropogenic climate change and provided more of the same heat.

“Therefore, this doesn’t dominate the headlines as much as the warmest on record, but wait a few more years. You’ll see another of them,” said Berkeley Earth, also ranked in 2021. Zeke Hausfather, a climate scientist in the surveillance group, said. 6th hottest. “This is a long-term trend and an indomitable upward trend.”

Gavin Schmitt, a climate scientist who leads NASA’s temperature team, said: And that’s thanks to us. And it won’t go away until you stop increasing the amount of carbon dioxide in the atmosphere. “

The last eight years have been the hottest eight years on record, and NASA and NOAA data are in agreement. Their data show that the Earth’s temperature, averaged over a decade to eliminate natural variability, is almost two degrees higher than it was 140 years ago.

Other 2021 measurements are from the Japan Meteorological Agency and are satellite measurements from the Copernicus Climate Change Service in Europe and the University of Alabama at Huntsville.

Approximately eight to ten years ago, with such a characteristic temperature rise, scientists began to investigate whether the temperature rise was accelerating. Both Schmidt and Housefather said early signs showed it, but it’s hard to tell for sure.

“I think we can see acceleration, but it’s not clear if it’s statistically robust,” Schmidt said in an interview. “If you look only at the last 10 years, how many are far above the trend lines of the last 10 years? Almost all of them.”

According to NOAA, the average global temperature last year was 58.5 degrees Celsius. In 1988, NASA’s then chief climate scientist James Hansen got a lot of attention when he testified to Congress about the hottest year of global warming at the time. Currently, 57.7 degrees in 1988 is ranked as the 28th hottest year on record.

According to Berkeley Earth, last year was the hottest year for 1.8 billion people in 25 countries in Asia, Africa and the Middle East, including China, Nigeria, Bangladesh, Iran, Myanmar and South Korea.

According to another new study, the deep sea, where most of the heat is stored in the sea, also set a record of warmth in 2021.

“Sea warming not only causes coral bleaching and threatens marine life and fish populations, but also accounts for about 25% of the world’s protein intake, destabilizing the Antarctic ice shelves and acting. It threatens sea level rise if it doesn’t happen, says Michael Mann, a climate scientist at Pennsylvania State University, who co-authored the study.

According to NOAA or NASA calculations, the last time the Earth was cooler than normal was in 1976. This means that 69% of people on the planet (more than 5 billion under the age of 45) have never experienced such a year, based on UN data. ..

North Carolina climatologist Kathie Dello, 39, said it made sense, although it wasn’t included in the new report. .. I didn’t have to do this. “

The fever continues: Earth celebrates its sixth warmest year on record | Chicago News

Source link The fever continues: Earth celebrates its sixth warmest year on record | Chicago News

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