Recent tropical Andean glacier retreat is unprecedented in the Holocene

• 成果类型: Article
• 署名作者: Gorin, Andrew L.; Shakun, Jeremy D.; Jones, Andrew G.; Kennedy, Tori M.; Marcott, Shaun A.; Goehring, Brent M.; Zoet, Lucas K.; Jomelli, Vincent; Bromley, Gordon R. M.; Mateo, Emilio I.; Mark, Bryan G.; Rodbell, Donald T.; Gilbert, Adrien; Caffee, Marc W.
• 署名单位: Boston College; University of California System; University of California Berkeley; University of Wisconsin System; University of Wisconsin Madison; Tulane University; Centre National de la Recherche Scientifique (CNRS); Universite PSL; College de France; INRAE; Institut de Recherche pour le Developpement (IRD); Aix-Marseille Universite; Ollscoil na Gaillimhe-University of Galway; University System of Ohio; Ohio State University; University System of Ohio; Ohio State University; Union College; Institut de Recherche pour le Developpement (IRD); Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Centre National de la Recherche Scientifique (CNRS); Purdue University System; Purdue University; Purdue University System; Purdue University; University of California System; University of California Berkeley
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11420
• DOI: 10.1126/science.adg7546
• 发表日期: 2024-08-02
• 页码: 517-521
• 关键词: climate-change; mass-loss; cordillera blanca; erosion; be-10; temperature; records; glaciation; recession; altitude

摘要

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.