America’s new normal: A degree hotter than two decades ago – Nashville-Davidson, Tennessee

Nashville-Davidson, Tennessee 2021-05-04 16:20:08 –

(AP) – America’s new room temperature is a bit hotter than it was just 20 years ago.

Scientists have long talked about climate change (rising temperatures, changes in rain and rainfall, extreme weather events) as a “new normal”. Data released by the US National Oceanic and Atmospheric Administration on Tuesday show clichéd numbers.

Not only is the normal temperature in the new United States hot, but it is rainy in the eastern and central parts of the country, and much drier in the western part than it was just a decade ago.

Meteorologist calculates Normal value It is based on 30 years of data to limit random fluctuations in daily weather. This is the standard set by the World Meteorological Organization. Every 10 years, NOAA Regular update For countries, states, and cities, by year, month, and season.

Based on meteorological station data from 1991 to 2020, the national annual temperature is now 53.3 degrees Celsius (11.8 degrees Celsius), about 0.5 degrees higher than it was 10 years ago. Twenty years ago, based on data from 1971 to 2000, it was usually 52.3 degrees (11.3 degrees Celsius). The average temperature in the United States in the 20th century was 52 degrees (11.1 degrees Celsius).

The new normal US annual temperature is 1.7 degrees (0.9 degrees Celsius) higher than the first normal calculated from 1901 to 1930.

Michael Palecki, NOAA’s Normal Project Manager, said:

In Fargo, North Dakota, the new normals are one-tenth lower than the old normals, with the exception that more than 90% of the United States is warmer than it was ten years ago. ..

In Chicago, North Carolina and Asheville, annual temperatures have risen 1.5 degrees in 10 years. In Seattle, Atlanta, Boston, and the Phoenix, normal annual temperatures have risen by at least 0.5 degrees over the last decade.

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In Charlottesville, Virginia, room temperature has risen to the highest of the 739 major meteorological stations. Other major changes were California, Texas, Virginia, Indiana, Arizona, Oregon, Arkansas, Maryland, Florida, North Carolina and Alaska.

New normal gets warmer due to burning fossil fuels Last 10 years “Most of the globe was much hotter than decades,” said Natalie Mahwald, a climate scientist at Cornell University.

For Phoenix, the usual biggest change was precipitation. Phoenix’s normal annual rainfall has dropped by 10% to 7.2 inches (18.2 centimeters). Rainfall in Los Angeles fell by 4.6%.

At the same time, rainfall increased by nearly 9% in Asheville and 6% in New York City. Seattle is usually 5% damp than before.

Climate scientists are divided on how useful or misleading the newly calculated normals are.

Jason Furtado, a professor of meteorology at the University of Oklahoma and Mahwald, updates regular calculations to help city and regional planners prepare for floods and droughts, determine what and when farmers plant, and energy. The company said it would help doctors address the public health issues that arise from the climate in response to changing demands.

However, Michael Mann, a climate scientist at Penn State University, said he prefers certain baselines used by NASA, such as 1951 to 1980. He said in an email that adjusting normality every 10 years “changes the meaning of” normal “and” normalizes “to avoid climate change.”

“It’s still strange to call it normal because it wasn’t climatically normal from 1991 to 2020,” said North Carolina climatologist Kathie Dello.

America’s new normal: A degree hotter than two decades ago Source link America’s new normal: A degree hotter than two decades ago

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