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Le réchauffement climatique d’origine humaine induit une accélération de l’élévation du niveau des mers. La perte de masse des calottes polaires est le contributeur potentiel le plus important et le plus incertain à cette hausse difficile à prédire. Il est crucial d’améliorer les différentes estimations qui oscillent entre +0,3 et +1 mètre à la fin du siècle. 
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Dans le cas d’un réchauffement de 5 °C, la montée des océans liée à la fonte du Groenland et de l’Antarctique atteindrait le plus vraisemblablement 51 cm.
DocBiodiv's insight:
Ice sheet contributions to future sea-level rise from structured expert judgment Jonathan L. Bamber, Michael Oppenheimer, Robert E. Kopp, Willy P. Aspinall, and Roger M. Cooke https://www.pnas.org/content/early/2019/05/14/1817205116 Four decades of Antarctic Ice Sheet mass balance from 1979–2017 Eric Rignot, Jérémie Mouginot, Bernd Scheuchl, Michiel van den Broeke, Melchior J. van Wessem, and Mathieu Morlighem PNAS January 22, 2019 116 (4) 1095-1103; first published January 22, 2019 https://doi.org/10.1073/pnas.1812883116
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NOAA ranks 2023 as the warmest year in its global temperature record, which dates back to 1850. There is a one-in-three chance that 2024 will be warmer than 2023 and a 99% chance that 2024 will rank among the five warmest years on record. Upper ocean heat content—the amount of heat stored in the top 2000 meters of the ocean—was record high in 2023. There were 78 named tropical storms across the globe in 2023, which was below average, and 20 in the North Atlantic, which was well above average.
DocBiodiv's insight:
National Oceanic and Atmospheric Administration’s National Centers for Environmental Information (US Department of Commerce) ncei.noaa.gov Ds la presse 2023 était l’année la plus chaude jamais enregistrée, mais 2024 s’annonce encore plus inquiétante
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11.01.2024, par Anaïs Soubeyran