气候变化领域集成服务门户(CCPortal): Reconstructing an interdecadal pacific oscillation index from a pacific basin

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DOI	10.1175/JCLI-D-20-0455.1
	Reconstructing an interdecadal pacific oscillation index from a pacific basin–wide collection of ice core records
	Porter S.E.; Mosley-Thompson E.; Thompson L.G.; Wilson A.B.
发表日期	2021
ISSN	08948755
起始页码	3839
结束页码	3852
卷号	34 期号:10
英文摘要	Using an assemblage of four ice cores collected around the Pacific basin, one of the first basinwide histories of Pacific climate variability has been created. This ice core–derived index of the interdecadal Pacific oscillation (IPO) incorporates ice core records from South America, the Himalayas, the Antarctic Peninsula, and northwestern North America. The reconstructed IPO is annually resolved and dates to 1450 CE. The IPO index compares well with observations during the instrumental period and with paleo-proxy assimilated datasets throughout the entire record, which indicates a robust and temporally stationary IPO signal for the last;550 years. Paleoclimate reconstructions from the tropical Pacific region vary greatly during the Little Ice Age (LIA), although the reconstructed IPO index in this study suggests that the LIA was primarily defined by a weak, negative IPO phase and hence more La Niña–like conditions. Although the mean state of the tropical Pacific Ocean during the LIA remains uncertain, the reconstructed IPO reveals some interesting dynamical relationships with the intertropical convergence zone (ITCZ). In the current warm period, a positive (negative) IPO coincides with an expansion (contraction) of the seasonal latitudinal range of the ITCZ. This relationship is not stationary, however, and is virtually absent throughout the LIA, suggesting that external forcing, such as that from volcanoes and/or reduced solar irradiance, could be driving either the ITCZ shifts or the climate dominating the ice core sites used in the IPO reconstruction. Ó 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Multidecadal variability; Pacific Ocean; Paleoclimate
语种	英语
scopus关键词	Nickel compounds; Tropics; American meteorological societies; Antarctic Peninsula; Climate variability; Copyright informations; Inter-decadal pacific oscillations; Intertropical convergence zone; Paleoclimate reconstruction; Tropical Pacific ocean; Ice
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178563
作者单位	Byrd Polar and Climate Research Center, Ohio State University, Columbus, OH, United States; Department of Geography, Ohio State University, Columbus, OH, United States; School of Earth Sciences, Ohio State University, Columbus, OH, United States; College of Food, Agricultural, and Environmental Sciences, Ohio State University Extension, Ohio State University, Columbus, OH, United States
推荐引用方式 GB/T 7714	Porter S.E.,Mosley-Thompson E.,Thompson L.G.,等. Reconstructing an interdecadal pacific oscillation index from a pacific basin–wide collection of ice core records[J],2021,34(10).
APA	Porter S.E.,Mosley-Thompson E.,Thompson L.G.,&Wilson A.B..(2021).Reconstructing an interdecadal pacific oscillation index from a pacific basin–wide collection of ice core records.Journal of Climate,34(10).
MLA	Porter S.E.,et al."Reconstructing an interdecadal pacific oscillation index from a pacific basin–wide collection of ice core records".Journal of Climate 34.10(2021).