气候变化领域集成服务门户(CCPortal): A 2;300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes

CCPortal

DOI	10.1073/pnas.1003719108
	A 2;300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes
	Bird B.W.; Abbott M.B.; Vuille M.; Rodbell D.T.; Stansell N.D.; Rosenmeier M.F.
发表日期	2011
ISSN	0027-8424
起始页码	8583
结束页码	8588
卷号	108 期号:21
英文摘要	Decadal and centennial mean state changes in South American summer monsoon (SASM) precipitation during the last 2,300 years are detailed using an annually resolved authigenic calcite record of precipitation δ18O from a varved lake in the Central Peruvian Andes. This unique sediment record shows that δ18O peaked during the Medieval Climate Anomaly (MCA) from A.D. 900 to 1100, providing evidence that the SASM weakened considerably during this period. Minimum δ18O values occurred during the Little Ice Age (LIA) between A.D. 1400 and 1820, reflecting a prolonged intensification of the SASM that was regionally synchronous. After the LIA, δ18O increased rapidly, particularly during the current warm period (CWP; A.D. 1900 to present), indicating a return to reduced SASM precipitation that was more abrupt and sustained than the onset of the MCA. Diminished SASM precipitation during the MCA and CWP tracks reconstructed Northern Hemisphere and North Atlantic warming and a northward displacement of the Intertropical Convergence Zone (ITCZ) over the Atlantic, and likely the Pacific. Intensified SASM precipitation during the LIA follows reconstructed Northern Hemisphere and North Atlantic cooling, El Niño-like warming in the Pacific, and a southward displacement of the ITCZ over both oceans. These results suggest that SASM mean state changes are sensitive to ITCZ variability as mediated by Western Hemisphere tropical sea surface temperatures, particularly in the Atlantic. Continued Northern Hemisphere and North Atlantic warming may therefore help perpetuate the recent reductions in SASM precipitation that characterize the last 100 years, which would negatively impact Andean water resources.
英文关键词	Oxygen isotopes; Tropical hydroclimate; Varves
语种	英语
scopus关键词	article; ice age; priority journal; sea surface temperature; seasonal rain forest; South America; summer; temperature sensitivity; Calcium Carbonate; Climate; Geologic Sediments; Oxygen Isotopes; Peru; Rain; Seasons; South America; Temperature; Time
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159146
作者单位	Bird, B.W., Department of Geology and Planetary Science, University of Pittsburgh, 4107 O'Hara Street, Pittsburgh, PA 15260, United States; Abbott, M.B., Department of Geology and Planetary Science, University of Pittsburgh, 4107 O'Hara Street, Pittsburgh, PA 15260, United States; Vuille, M., Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, United States; Rodbell, D.T., Geology Department, Union College, 807 Union Street, Schenectady, NY 12308, United States; Stansell, N.D., Department of Geology and Planetary Science, University of Pittsburgh, 4107 O'Hara Street, Pittsburgh, PA 15260, United States; Rosenmeier, M.F., Department of Geology and Planetary Science, University of Pittsburgh, 4107 O'Hara Street, Pittsburgh, PA 15260, United States
推荐引用方式 GB/T 7714	Bird B.W.,Abbott M.B.,Vuille M.,et al. A 2;300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes[J],2011,108(21).
APA	Bird B.W.,Abbott M.B.,Vuille M.,Rodbell D.T.,Stansell N.D.,&Rosenmeier M.F..(2011).A 2;300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes.Proceedings of the National Academy of Sciences of the United States of America,108(21).
MLA	Bird B.W.,et al."A 2;300-year-long annually resolved record of the South American summer monsoon from the Peruvian Andes".Proceedings of the National Academy of Sciences of the United States of America 108.21(2011).