For the first time in six years, the country has not suffered a widespread heat wave. A high monthly variability of temperatures has been raised.
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The climate change has so much given the habit of a sequence of records and extremes that an outgoing year less of the lot seems almost surprising. It is the feeling that predominates to the reading of the meteorological balance of the year 2021 in France, including Meteo France publishes a temporary version, Wednesday, December 15 – it will be finalized in January 2022. It comes out that 2021 should rank like the 21 e Year the hottest since 1900. Far behind 2020, the hottest year ever recorded.
With an anomaly of + 0.2 ° C compared to the period 1981-2010, 2021 remains warmer than normal, but less than the previous seven years. This is explained first because France has seen many cold air masses. Then because the first semester, at the global level, was marked by the Niña phenomenon, a cooling of the Eastern Eastern Pacific’s surface water that decreases the global temperature of the planet. This phenomenon has been back for a few weeks and should last until the first quarter 2022.
Multiplication of extreme events
“This ranking does not change the background trend of global warming,” says Matthieu Sorel, Climatologist at Meteo France, recalling that France has already warmed up 2 ° C since 1961-1990. “The natural variability of the climate modules The effect of the warming: it can lead to cooling certain years or in some regions, recalls the climateologist Christophe Cassou, research director at the CNRS. This year, she hidden in France the tendency to the warming, While last year she has amplified her. “” If climate change does not prevent the cold waves from occurring, it decreases the probability, “he adds.
On the global scale, 2021 should be classified as the fifth, or sixth or seventh year the hottest and the last seven years are becoming the hottest ever recorded, according to the World Meteorological Organization. Temperature records were beaten in Canada (49.6 ° C) or in the California Death Valley (54.4 ° C), and extreme events have multiplied: catastrophic floods and precipitation, heat waves and fires. “It’s striking that we have reached very high overall temperature levels despite La Niña, explains Christophe Cassou. At the global level, 2021 is the hottest year ever recorded with an episode La Niña.” “
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