Recent tropical Andean glacier retreat is unprecedented in the Holocene.
Science
; 385(6708): 517-521, 2024 Aug 02.
Article
en En
| MEDLINE
| ID: mdl-39088605
ABSTRACT
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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Colección:
01-internacional
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Science
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos