globalchange  > 气候变化与战略
DOI: 10.1016/j.earscirev.2020.103152
论文题名:
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE)
作者: Davies B.J.; Darvill C.M.; Lovell H.; Bendle J.M.; Dowdeswell J.A.; Fabel D.; García J.-L.; Geiger A.; Glasser N.F.; Gheorghiu D.M.; Harrison S.; Hein A.S.; Kaplan M.R.; Martin J.R.V.; Mendelova M.; Palmer A.; Pelto M.; Rodés Á.; Sagredo E.A.; Smedley R.K.; Smellie J.L.; Thorndycraft V.R.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 204
语种: 英语
中文关键词: Geochronology ; Geomorphology ; Glaciation ; Ice Sheet ; Patagonia ; Quaternary
英文关键词: continental shelf ; geochronology ; geomorphology ; glacial landform ; glacier advance ; Holocene ; ice sheet ; ice stream ; ice-dammed lake ; reconstruction ; Pacific Ocean ; Patagonia
英文摘要: We present PATICE, a GIS database of Patagonian glacial geomorphology and recalibrated chronological data. PATICE includes 58,823 landforms and 1,669 geochronological ages, and extends from 38°S to 55°S in southern South America. We use these data to generate new empirical reconstructions of the Patagonian Ice Sheet (PIS) and subsequent ice masses and ice-dammed palaeolakes at 35 ka, 30 ka, 25 ka, 20 ka, 15 ka, 13 ka (synchronous with the Antarctic Cold Reversal), 10 ka, 5 ka, 0.2 ka and 2011 AD. At 35 ka, the PIS covered of 492.6 x103 km2, had a sea level equivalent of ~1,496 mm, was 350 km wide and 2090 km long, and was grounded on the Pacific continental shelf edge. Outlet glacier lobes remained topographically confined and the largest generated the suites of subglacial streamlined bedforms characteristic of ice streams. The PIS reached its maximum extent by 33 – 28 ka from 38°S to 48°S, and earlier, around 47 ka from 48°S southwards. Net retreat from maximum positions began by 25 ka, with ice-marginal stabilisation then at 21 – 18 ka, which was then followed by rapid, irreversible deglaciation. By 15 ka, the PIS had separated into disparate ice masses, draining into large ice-dammed lakes along the eastern margin, which strongly influenced rates of recession. Glacial readvances or stabilisations occurred at least at 14 – 13 ka, 11 ka, 6 – 5 ka, 2 – 1 ka, and 0.5 – 0.2 ka. We suggest that 20th century glacial recession (% a-1) is occurring faster than at any time documented during the Holocene. © 2020 The Authors
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166048
Appears in Collections:气候变化与战略

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作者单位: Centre for Quaternary Research, Department of Geography, Royal Holloway University of London, Egham Hill, Egham, Surrey, TW20 0EX, United Kingdom; Department of Geography, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom; School of the Environment, Geography and Geosciences, University of Portsmouth, Buckingham Building, Lion Terrace, Portsmouth, PO1 3HE, United Kingdom; Scott Polar Research Institute, University of Cambridge, Cambridge, CB2 1ER, United Kingdom; Scottish Universities Environmental Research Centre (SUERC), Rankine Avenue, East Kilbride, G75 0QF, United Kingdom; Instituto de Geografía, Facultad de Historia, Geografía y Ciencia Política, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago, 782-0436, Chile; Department of Geography and Earth Sciences, Aberystwyth University, Wales, SY23 3DB, United Kingdom; College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, TR10 9EZ, United Kingdom; School of GeoSciences, University of Edinburgh, Drummond Street, Edinburgh, EH8 9XP, United Kingdom; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, United States; Nichols College, 121 Centre Road, PO Box 5000, Dudley, MA 01571, United States; Millenium Nuclei Palaeoclimate, ANID Millennium Science Initiative, Santiago, Chile; Estación Patagonia de Investigaciones Interdisciplinarias UC, Pontificia Universidad Católica de Chile, Chile; OHM-I, LabEx DRIIHM. Programme "investissements d'avenir": ANR-11-LABX-0010), INEE-CNRS, Paris, France; Department of Geography and Planning, University of Liverpool, Liverpool, L69 7ZT, United Kingdom; School of Geography, Geology and the Environment, University of Leicester, University Road, Leicester, LE1 7RH, United Kingdom; School of Geographical & Earth Sciences, University of Glasgow, Glasgow, G12 8QQ, United Kingdom

Recommended Citation:
Davies B.J.,Darvill C.M.,Lovell H.,et al. The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE)[J]. Earth Science Reviews,2020-01-01,204
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