STATE OF THE CLIMATE IN 2021
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Blunden, Jessica
Boyer, Tim
Dunn, Robert J.H.
Allen, Jessicca
Hammer, Gregory
Love-Brotak, S. Elizabeth
Misch, Deborah J.
Ohlmann, Laura
Riddle, Deborah B.
Veasey, Sara W.
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In 2021, both social and economic activities began to return towards the levels preceding the COVID-19 pandemic for some parts of the globe, with others still experiencing restrictions. Meanwhile, the climate has continued to respond to the ongoing increase in greenhouse gases and resulting warming. La Nia, a phenomenon which tends to depress global temperatures while changing rainfall patterns in many regions, prevailed for all but two months of the year. Despite this, 2021 was one of the six-warmest years on record as measured by global mean surface temperature with an anomaly of between +0.21 and +0.28C above the 19912020 climatology.
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