气候变化领域集成服务门户(CCPortal): Millennial-scale climate variability over land overprinted by ocean temperature fluctuations

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DOI	10.1038/s41561-022-01056-4
	Millennial-scale climate variability over land overprinted by ocean temperature fluctuations
	Hebert, R.; Herzschuh, U.; Laepple, T.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	899
结束页码	+
卷号	15 期号:11 页码:22
英文摘要	Variations in regional temperature have widespread implications for society, but our understanding of the amplitude and origin of long-term natural variability is insufficient for accurate regional projections. This is especially the case for terrestrial temperature variability, which is currently thought to be weak over long timescales. By performing spectral analysis on climate reconstructions, produced using sedimentary pollen records from the Northern Hemisphere over the last 8,000 years, coupled with instrumental data, we provide a comprehensive estimate of regional temperature variability from annual to millennial timescales. We show that short-term random variations are overprinted by strong ocean-driven climate variability on multi-decadal and longer timescales. This may cause substantial and potentially unpredictable regional climatic shifts in the coming century, in contrast to the relatively muted and homogeneous warming projected by climate models. Due to the marine influence, regions characterized by stable oceanic climate at sub-decadal timescales experience stronger long-term variability, and continental regions with higher sub-decadal variability show weaker long-term variability. This fundamental relationship between the timescales provides a unique insight into the emergence of a marine-driven low-frequency regime governing terrestrial climate variability and sets the basis to project the amplitude of temperature fluctuations on multi-decadal timescales and longer. Temperature variability over land is enhanced by ocean temperature fluctuations on millennial timescales, with implications for regional-scale climate change, according to an analysis of Northern Hemisphere proxy records and observations.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000876863000001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272499
作者单位	Helmholtz Association; Alfred Wegener Institute, Helmholtz Centre for Polar & Marine Research; University of Potsdam; University of Potsdam; University of Bremen
推荐引用方式 GB/T 7714	Hebert, R.,Herzschuh, U.,Laepple, T.. Millennial-scale climate variability over land overprinted by ocean temperature fluctuations[J],2022,15(11):22.
APA	Hebert, R.,Herzschuh, U.,&Laepple, T..(2022).Millennial-scale climate variability over land overprinted by ocean temperature fluctuations.NATURE GEOSCIENCE,15(11),22.
MLA	Hebert, R.,et al."Millennial-scale climate variability over land overprinted by ocean temperature fluctuations".NATURE GEOSCIENCE 15.11(2022):22.