United States on Saturday raised concerns about July’s heatwaves which is the hottest in 142 years; and that this climate change might be more devastating if appropriate measures are not taken, EKOHOTBLOG reports.
US weather report reveals that July is the hottest month in 142 years of record keeping.
According to a US weather report reviewed by EKOHOTBLOG, the last seven Julys, from 2015 to 2021, have been the hottest seven Julys on record, said NOAA Climatologist Ahira Sanchez-Lugo. Last month was 0.93C (1.67F) warmer than the 20th-century average for the month.
“In this case, first place is the worst place to be,” NOAA Administrator Rick Spinrad said in a press release. “This new record adds to the disturbing and disruptive path that climate change has set for the globe.”
Pennsylvania State University climate scientist Michael Mann said “this is climate change”.
Warming on land in western North America and parts of Europe and Asia really drove the record-setting heat, Sanchez-Lugo said. While the worldwide temperature was barely higher than the record, what shattered it was land temperature over the Northern Hemisphere, she added.
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Northern Hemisphere temperatures were a third of a degree (.19 degrees Celsius) higher than the previous record set in July 2012, which for temperature records is “a wide margin”, Sanchez-Lugo said.
One factor helping the world bake this summer is a natural weather cycle called the Arctic Oscillation, sort of a cousin to El Nino, which in its positive phase is associated with more warming, the NOAA climatologist said.
Even with a scorching July and a nasty June, this year so far is only the sixth warmest on record. That is mostly because 2021 started cooler than recent years due to a La Nina cooling of the central Pacific that often reduces the global temperature average, Sanchez-Lugo said.
“One month by itself does not say much, but that this was a La Nina year and we still had the warmest temperatures on record … fits with the pattern of what we have been seeing for most of the last decade now,” said University of Illinois meteorology professor Donald Wuebbles.
According to Aljazeera, Spinrad of the NOAA said the causes of the extreme changes in weather conditions is an all too familiar phenomenon.
“The extreme events we are seeing worldwide – from record-shattering heat waves to extreme rainfall to raging wildfires – are all long-predicted and well-understood impacts of a warmer world,” he said.
“They will continue to get more severe until the world cuts its emissions of CO2 and other greenhouse gases down to net-zero.”
While the world set a record in July, the United States only tied for its 13th hottest July on record. Even though California, Nevada, Oregon and Washington had their hottest Julys, slightly cooler than normal months in Texas, Oklahoma, Kansas, Arkansas, Missouri, Alabama, Maine, Vermont and New Hampshire kept the nation from approaching record heat levels.
The last time the globe had a July cooler than the 20th century average was in 1976, which was also the last year the globe was cooler than normal.
“So if you’re younger than 45 you haven’t seen a year [or July] where the mean temperature of the planet was cooler than the 20th-century average,” said Princeton University climate scientist Gabriel Vecchi.
Asia had its hottest July ever, surpassing 2010, the NOAA said, while Europe had its second-hottest July, trailing only 2018.
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