San Diego Union-Tribune

2020 RIVALS HOTTEST YEAR ON RECORD

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Earth’s rising fever hit or neared record hot temperatur­e levels in 2020, global weather groups reported Thursday.

While NASA and a couple of other measuremen­t groups said 2020 passed or essentiall­y tied 2016 as the hottest year on record, more agencies, including the National Oceanic Atmospheri­c Administra­tion, said last year came in a close second or third. The difference­s in rankings mostly turned on how scientists accounted for data gaps in the Arctic, which is warming faster than the rest of the globe.

NOAA said 2020 averaged 58.77 degrees (14.88 degrees Celsius), a few hundredths of a degree behind 2016. NASA saw 2020 as warmer than 2016 but so close they are essentiall­y tied. The European Copernicus group also called it an essential tie for hottest year, with 2016 warmer by an insignific­ant fraction. Japan’s weather agency put 2020 as warmer than 2016, but a separate calculatio­n by Japanese scientists put 2020 as a close third behind 2016 and 2019. The World Meteorolog­ical Organizati­on, the British weather agency and Berkeley Earth’s monitoring team had 2016 ahead.

All the monitoring agencies agree the six warmest years on record have been the six years since 2015.

Earth has now warmed 1.2 degrees Celsius (2.2 degrees Fahrenheit) since preindustr­ial times and is adding another 0.2 degree Celsius (0.36 Fahrenheit) a decade.

That means the planet is nearing an internatio­nal warming threshold set in Paris in 2015. Nations of the world set a goal of preventing at least 2 degrees Celsius (3.6 degrees Fahrenheit) of warming, with a tougher secondary goal of limiting warming to 1.5 degrees (2.7 degrees Fahrenheit).

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