globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2013.05.008
Scopus记录号: 2-s2.0-84879456512
论文题名:
High-resolution variability of the South American summer monsoon over the last seven millennia: Insights from a speleothem record from the central Peruvian Andes
作者: Kanner L.C.; Burns S.J.; Cheng H.; Edwards R.L.; Vuille M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 75
起始页码: 1
结束页码: 10
语种: 英语
英文关键词: El Niño-Southern Oscillation ; Oxygen isotopes ; Peruvian Andes ; South American summer monsoon ; Speleothem
Scopus关键词: Climate variability ; Isotopic composition ; Measurements of ; Oxygen isotopes ; Peruvian Andes ; Speleothem ; Stable oxygen isotopes ; Summer monsoon ; Atmospheric pressure ; Caves ; Climatology ; Incident solar radiation ; Isotopes ; Lasers ; Oxygen ; Precipitation (meteorology) ; Atmospheric thermodynamics ; climate variation ; El Nino-Southern Oscillation ; Holocene ; oxygen isotope ; paleoclimate ; precipitation (climatology) ; proxy climate record ; sea surface temperature ; speleothem ; timescale ; Andes ; Pacific Ocean ; Peru
英文摘要: Stable oxygen isotope (δ18O) measurements of two speleothems, collected from Huagapo Cave in the central Peruvian Andes and with overlapping age from 1.1 to 1.4ka, characterize tropical South American climate variability over the last 7150 years. In the study region, precipitation δ18O (δ18Op) is inversely correlated to rainfall amount upstream in the Amazon Basin and the intensity of convection associated with the South American summer monsoon (SASM). Speleothem long-axis profiles yield an average age resolution of five years and permit investigation of climate over orbital to decadal timescales. Variations in the isotopic composition of Huagapo Cave calcite (δ18Oc) are in good agreement with several precipitation proxy records from ice cores, speleothems, and lake sediments from the central Peruvian Andes. From the mid-Holocene to today, δ18Oc, a proxy for δ18Op, tracks changes in local insolation and exhibits a ~2‰ decrease. In the Late Holocene, Huagapo Cave δ18Oc is characterized by two periods of significant decline in SASM intensity (up to 1.5‰ increase in δ18Oc) even when insolation is reaching a local maximum and the SASM would be expected to intensify. These millennial-scale reductions in SASM intensity could in part be influenced by a reduction in the zonal SST gradient of the Pacific Ocean, favoring El Niño-like development. © 2013 Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60559
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作者单位: Department of Geosciences, University of Massachusetts, Amherst, MA 01002, United States; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an 710049, China; Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN 55455, United States; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY 12222, United States

Recommended Citation:
Kanner L.C.,Burns S.J.,Cheng H.,et al. High-resolution variability of the South American summer monsoon over the last seven millennia: Insights from a speleothem record from the central Peruvian Andes[J]. Quaternary Science Reviews,2013-01-01,75
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