气候变化领域集成服务门户(CCPortal): Oxygen Isotopic Signatures of Major Climate Modes and Implications for Detectability in Speleothems

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DOI	10.1029/2020GL089515
	Oxygen Isotopic Signatures of Major Climate Modes and Implications for Detectability in Speleothems
	Midhun M.; Stevenson S.; Cole J.E.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:1
英文摘要	Natural and social systems worldwide are impacted by climate modes such as the El Niño/Southern Oscillation (ENSO), Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO), making it imperative to understand their sensitivity to climate change. Paleoclimate studies extend the observational climate baseline, and speleothem records (δ18Ospel) are a common data source. However, relationships between δ18Ospel and climate modes are uncertain; climate models provide a way to test the strength and stability of these relationships. Here, we use the isotope-enabled Community Earth System Model's Last Millennium Ensemble combined with a forward proxy model to delineate the global expression of modal variability in “pseudo-stalagmite” (δ18Ospel) records worldwide. The modeled δ18Ospel spatially correlates with modal signatures. However, substantial changes in modal variance only modestly affect individual δ18Ospel variance. A network of δ18Ospel records, particularly one that straddles the Pacific, significantly improves the reconstructability of ENSO variance. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate change; Isotopes; Oxygen; Atlantic multidecadal oscillations; Earth system model; Last millenniums; Modal variability; Oxygen isotopic; Pacific decadal oscillation; Paleoclimate studies; Social systems; Climate models
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169264
作者单位	Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; Bren School of Environmental Sciences and Management, University of California, Santa Barbara, Santa Barbara, CA, United States
推荐引用方式 GB/T 7714	Midhun M.,Stevenson S.,Cole J.E.. Oxygen Isotopic Signatures of Major Climate Modes and Implications for Detectability in Speleothems[J],2021,48(1).
APA	Midhun M.,Stevenson S.,&Cole J.E..(2021).Oxygen Isotopic Signatures of Major Climate Modes and Implications for Detectability in Speleothems.Geophysical Research Letters,48(1).
MLA	Midhun M.,et al."Oxygen Isotopic Signatures of Major Climate Modes and Implications for Detectability in Speleothems".Geophysical Research Letters 48.1(2021).