2023-07-25 17:21:42
The Planet has experienced its hottest 22 consecutive days on record since weather records began, and likely in around 100,000 years. How can such a record be advanced? Answer with IPCC paleoclimatologist Valérie Masson-Delmotte.
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Before this month of July 2023, the previous global heat record on Earth was 16.924 ° C recorded on July 24, 2022. However, since July 3, 2023, the temperature has risen above 17 ° C every day, and this until July 24, according to numbers from the University of Maine. The deviation from the 1979-2000 average is therefore around 0.8°C in recent days.
Some journalists and climate specialists talk about record heat for at least 100,000 years, what is it really and where does this information come from? As the paleoclimatologist Valérie Masson-Delmotteco-author of the IPCC (Intergovernmental Panel on Climate Change) explains: “ Each of the past decades has been successively the warmest since 1850 — a period when surface air and sea surface temperature measurements allow for a planetary estimate.. It is therefore certain that this month of July 2023 is, until now, the hottest since 1850.
The last hottest period occurred 125,000 years ago
But, thanks to the analysis of microfossils, pollen, or even ice, it is possible to have a clear idea of the past climate: “ The last decades are exceptionally hot, at the planetary level, in the context of the temperature variations of the last 2000 years. The decade 2011-2020 is outside the range of variations of the last 2,000 years. The warmest previous period is before the last ice age, about 125,000 years ago, with an estimate (with a time step of several centuries) of temperature 0.5 to 1.5°C above 1850-1900, due to the Earth’s orbit and tilt axis. specifies the IPCC climatologist. This therefore allows us to say that these 22 days of July 2023 are very probably the hottest for around 100,000 years.
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