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DOI	10.1038/s41561-021-00846-6
	Direct astronomical influence on abrupt climate variability
	Zhang X.; Barker S.; Knorr G.; Lohmann G.; Drysdale R.; Sun Y.; Hodell D.; Chen F.
发表日期	2021
ISSN	1752-0894
卷号	14 期号:11
英文摘要	Changes in the magnitude of millennial-scale climate variability (MCV) during the Late Pleistocene occur as a function of changing background climate state over tens of thousands of years, an indirect consequence of slowly varying incoming solar radiation associated with changes in Earth’s orbit. However, whether astronomical forcing can stimulate MCV directly (without a change in the background state) remains to be determined. Here we use a comprehensive fully coupled climate model to demonstrate that orbitally driven insolation changes alone can give rise to spontaneous millennial-scale climate oscillations under intermediate glacial conditions. Our results demonstrate that an abrupt transition from warm interstadial to cold stadial conditions can be triggered directly by a precession-controlled increase in low-latitude boreal summer insolation and/or an obliquity-controlled decrease in high-latitude mean annual insolation, by modulating North Atlantic low-latitude hydroclimate and/or high-latitude sea ice–ocean–atmosphere interactions, respectively. Furthermore, contrasting insolation effects over the tropical versus subpolar North Atlantic, exerted by obliquity or precession, result in an oscillatory climate regime, even within an otherwise stable climate. With additional sensitivity experiments under different glacial–interglacial climate backgrounds, we synthesize a coherent theoretical framework for climate stability, elaborating the direct and indirect (dual) control by Earth’s orbital cycles on millennial-scale climate variability during the Pleistocene. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	astronomy; climate modeling; climate variation; hydrometeorology; interstadial; obliquity; Pleistocene; seasonal variation; solar radiation; Atlantic Ocean; Atlantic Ocean (North)
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/250837
作者单位	Group of Alpine Paleoecology and Human Adaptation (ALPHA), State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Western China’s Environmental Systems (Ministry of Education), College of Earth and Environmental Science, Lanzhou University, Lanzhou, China; Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom; MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; School of Geography, Earth and Atmospheric Sciences, The University of Melbourne, Parkville, VIC, Australia; State Key Laboratory of Loess and Quaternary Geology, CAS Center for Excellence in Quaternary Geology and Global changes, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China; Godwin Laboratory for Paleoclimate Research, Department o...
推荐引用方式 GB/T 7714	Zhang X.,Barker S.,Knorr G.,et al. Direct astronomical influence on abrupt climate variability[J],2021,14(11).
APA	Zhang X..,Barker S..,Knorr G..,Lohmann G..,Drysdale R..,...&Chen F..(2021).Direct astronomical influence on abrupt climate variability.Nature Geoscience,14(11).
MLA	Zhang X.,et al."Direct astronomical influence on abrupt climate variability".Nature Geoscience 14.11(2021).