La barrière de glace du glacier Thwaites proche du détachement en Antarctique

18 mai 2026

Rapporté par l'IA

La barrière de glace orientale du glacier Thwaites en Antarctique est en train de se désagréger alors que d'importantes fractures se propagent à travers la structure flottante. Ce phénomène menace d'accélérer l'écoulement du glacier et de contribuer à l'élévation du niveau mondial des mers au cours des prochaines décennies.

La barrière de glace orientale de Thwaites couvre environ 1500 kilomètres carrés et mesure 350 mètres d'épaisseur. Les observations satellitaires montrent que la barrière se fracture rapidement autour de son point d'ancrage et le long de la ligne d'échouage, là où le glacier rencontre la mer. Les vitesses d'écoulement ont triplé depuis janvier 2020 pour atteindre un peu plus de 2000 mètres par an en janvier 2026, avec une accélération supplémentaire enregistrée au cours des mois suivants.

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jeudi 14 mai 2026 07h37

La barrière de glace du glacier Thwaites proche du détachement en Antarctique

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