Recent tropical Andean glacier retreat is unprecedented in the Holocene - Archive ouverte HAL
Article Dans Une Revue Science Année : 2024

Recent tropical Andean glacier retreat is unprecedented in the Holocene

Andrew Gorin
Andrew Jones
Tori Kennedy
Shaun Marcott
Brent Goehring
Lucas Zoet
Gordon Bromley
Emilio Mateo
Bryan Mark
Donald Rodbell
Marc Caffee

Résumé

Tropical glaciers have retreated over recent decades, but whether the magnitude of this retreat exceeds the bounds of Holocene fluctuations is unclear. We measured cosmogenic beryllium-10 and carbon-14 concentrations in recently exposed bedrock at the margin of four glaciers spanning the tropical Andes to reconstruct their past extents relative to today. Nuclide concentrations are near zero in almost all samples, suggesting that these locations were never exposed during the Holocene. Our data imply that many glaciers in the tropics are probably now smaller than they have been in at least 11,700 years, making the tropics the first large region where this milestone has been documented.
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Dates et versions

hal-04751640 , version 1 (24-10-2024)

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Citer

Andrew Gorin, Jeremy Shakun, Andrew Jones, Tori Kennedy, Shaun Marcott, et al.. Recent tropical Andean glacier retreat is unprecedented in the Holocene. Science, 2024, 385 (6708), pp.517-521. ⟨10.1126/science.adg7546⟩. ⟨hal-04751640⟩
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