气候变化领域集成服务门户(CCPortal): Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability

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DOI	10.1016/j.quascirev.2019.05.029
	Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability
	Reynhout S.A.; Sagredo E.A.; Kaplan M.R.; Aravena J.C.; Martini M.A.; Moreno P.I.; Rojas M.; Schwartz R.; Schaefer J.M.
发表日期	2019
ISSN	0277-3791
起始页码	178
结束页码	187
卷号	220
英文摘要	Alpine glaciers are sensitive indicators of changes in climate, and their ubiquity in mountainous regions make them valuable proxies for terrestrial climate reconstructions worldwide. However, the timing and extent of glacier change across the South American mid-latitudes through the Holocene are still poorly constrained relative to their counterparts in the Northern Hemisphere. Here we report a new 10Be surface exposure-based chronology of moraines recording a series of progressively less-extensive glacier advances of Glaciar Torre (Argentina, 49.3°S/73.0°W) since the Last Glacial Maximum, with expansions culminating at 17,600 ± 900, 13,500 ± 500, 9700 ± 400, 6900 ± 200, 6100 ± 300, 4500 ± 200, and 530 ± 60 yr BP. The declining magnitude of Holocene glacier expansions parallels a gradual rise in local summer insolation intensity during the Holocene, while individual advances occurred during inferred negative Southern Annular Mode (SAM)-like states at centennial to millennial timescales. These observations suggest that (i) summer insolation intensity modulated antiphased trends in glacier extent in the polar hemispheres during the Holocene, and that (ii) centennial-scale ‘SAM-like’ temperature and precipitation anomalies paced glacier fluctuations throughout Patagonia. Given the persistence of the inferred ’SAM-like’ anomalies throughout the Holocene, the modern measured trend towards positive SAM index conditions could mark the onset of a fundamental shift in the climate of the Southern Hemisphere midlatitudes that warrants consideration in projections of future climate. © 2019
英文关键词	Cosmogenic isotopes; Geomorphology; Glacial; Glaciation; Holocene; Insolation; Paleoclimatology; South America; Southern annular mode
语种	英语
scopus关键词	Expansion; Geomorphology; Glacial geology; Cosmogenic isotopes; Glacial; Glaciation; Holocenes; Paleoclimatology; South America; Southern Annular Mode; Incident solar radiation; chronology; geomorphology; glacier advance; Holocene; insolation; Last Glacial Maximum; midlatitude environment; mountain region; paleoclimate; precipitation (climatology); reconstruction; Southern Hemisphere; summer; Argentina; Patagonia
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151804
作者单位	Departamento de Geología, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Plaza Ercilla 803, Santiago, 8370450, Chile; Núcleo Milenio Paleoclima, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Chile; Instituto de Geografía, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, 7820436, Chile; Lamont-Doherty Earth Observatory, P.O. Box 1000, 61 Route 9W, Palisades, NY 10964-100, United States; Centro de Investigación Gaia Antártica, Universidad de Magallanes, Avenida Bulnes 01855, Punta Arenas, 62000009, Chile; Centro de Investigaciones en Ciencias de la Tierra (CONICET-Facultad de Ciencias Exactas, Físicas y Naturales, UNC), Vélez Sársfeld 1611, Córdoba, X5016GCA, Argentina; Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Chile; Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Avenida Blanco Encalada, Santiago, 2002, Chile; Department of Earth and Environmenta...
推荐引用方式 GB/T 7714	Reynhout S.A.,Sagredo E.A.,Kaplan M.R.,et al. Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability[J],2019,220.
APA	Reynhout S.A..,Sagredo E.A..,Kaplan M.R..,Aravena J.C..,Martini M.A..,...&Schaefer J.M..(2019).Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability.Quaternary Science Reviews,220.
MLA	Reynhout S.A.,et al."Holocene glacier fluctuations in Patagonia are modulated by summer insolation intensity and paced by Southern Annular Mode-like variability".Quaternary Science Reviews 220(2019).