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State of the Climate in 2020

In 2020, the dominant greenhouse gases stored in Earth’s atmosphere continued to increase. Weak El Niño-like conditions in the eastern equatorial Pacific Ocean in early 2020 cooled and transitioned to a moderate La Niña later in the year. Even so, the annual global surface temperature across land and oceans was among the three highest in records dating to the mid- to late 1800s. As is typical, some areas around the world were notably dry in 2020 and some were notably wet. The 2020 Southwest Asian Monsoon season (June–September) was the wettest since 1981, also coincident with the emergence of La Niña. The Meiyu rainy season, which usually occurs between July and August over the Yangtze and Huaihe River Valleys of China, was extended by two months in 2020. May–October total rainfall averaged over the area was the most since the start of the record in 1961. Associated severe flooding affected about 45.5 million people.
Author: Blunden, J.; Boyer, T.
Language: English
Pubished By: Bulletin of the American Meteorological Society
Pubished date: August 2021

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