globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.08.001
Scopus记录号: 2-s2.0-85052077797
论文题名:
Chronology, stratigraphy and hydrological modelling of extensive wetlands and paleolakes in the hyperarid core of the Atacama Desert during the late quaternary
作者: Pfeiffer M.; Latorre C.; Santoro C.M.; Gayo E.M.; Rojas R.; Carrevedo M.L.; McRostie V.B.; Finstad K.M.; Heimsath A.; Jungers M.C.; De Pol-Holz R.; Amundson R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 197
起始页码: 224
结束页码: 245
语种: 英语
英文关键词: Atacama desert ; Hyperaridity ; Late quaternary ; Paleogeography ; Sedimentology ; South America ; Wetlands
Scopus关键词: Arid regions ; Hydrology ; Sedimentology ; Sodium chloride ; Stratigraphy ; Water resources ; Atacama Desert ; Hyperaridity ; Late quaternary ; Paleogeography ; South America ; Wetlands ; arid region ; aridity ; chronology ; gastropod ; hydrological modeling ; lake ; paleoclimate ; paleogeography ; Pleistocene ; recharge ; salt pan ; sedimentology ; stratigraphy ; wetland ; Andes ; Atacama Desert ; Chile ; Chile ; Bacillariophyta ; Gastropoda
英文摘要: The halite-encrusted salt pans (salars) present at low elevations in the hyperarid core of the Atacama Desert in northern Chile are unique features of one of the driest and possibly oldest deserts on Earth. Here we show that these landscapes were shallow freshwater lakes and wetlands during the last glacial period and formed periodically between ∼46.9 ka and 7.7 ka. The moisture appears to have been sourced from increased Andean runoff and most of our chronologies for these deposits were coeval with the Central Andean Pluvial Event (17.5–14.2 ka and 13.8–9.7 ka), but we also find evidence for older as well as slightly younger wet phases. These environments supported a diverse hygrophytic-halophytic vegetation, as well as an array of diatoms and gastropods. Using a regional hydrological model, we estimate that recharge rates from 1.5 to 4 times present were required to activate and maintain these wetlands in the past. Activation in the late Pleistocene was part of a regional enhancement of water resources, extending from the Andes, downstream and through riparian corridors, to the lowest and most arid portions of the desert itself. This fundamentally unique environment was encountered by the earliest human explorers in the region, and most likely facilitated migration and encampments on a landscape that at present lacks macroscopic life on its surface. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112075
Appears in Collections:气候减缓与适应

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作者单位: Department of Environmental Science, Policy and Management, University of California Berkeley, 130 Mulford Hall, Berkeley, CA 94720, United States; Departamento de Ingeniería y Suelos, Facultad de Ciencias Agronómicas, Universidad de Chile, Santa Rosa, La Pintana 11315, Chile; Departamento de Ecología, Pontificia Universidad Católica de Chile, Santiago, Chile; Centro UC del Desierto de Atacama, Pontificia Universidad Católica de Chile, Santiago, Chile; Institute of Ecology and Biodiversity (IEB), Santiago, Chile; Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 6-D, Antofagasta, Arica 1520, Chile; Laboratory for Stable Isotope Biogeochemistry, Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, Concepción, Chile; Center for Climate and Resilience Research (CR)2 , Chile; CSIRO Land & Water, Po Box 2583, Brisbane, QLD 4001, Australia; Departamento de Antropología, Pontificia Universidad Católica de Chile, Santiago, Chile; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States; School of Earth and Space Exploration, Arizona State University, ISTB4, Room 795, 781 E. Terrace Road, Tempe, AZ 85287, United States; Department of Geosciences, 306 Olin Science Hall, Denison College, 100 West College Street, Granville, OH 43023, United States; GAIA-Antártica, Universidad de Magallanes, Punta Arenas, Chile

Recommended Citation:
Pfeiffer M.,Latorre C.,Santoro C.M.,et al. Chronology, stratigraphy and hydrological modelling of extensive wetlands and paleolakes in the hyperarid core of the Atacama Desert during the late quaternary[J]. Quaternary Science Reviews,2018-01-01,197
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