气候变化领域集成服务门户(CCPortal): Reconciling roles of sulphate aerosol forcing and internal variability in Atlantic multidecadal climate changes

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DOI	10.1007/s00382-019-04811-3
	Reconciling roles of sulphate aerosol forcing and internal variability in Atlantic multidecadal climate changes
	Watanabe M.; Tatebe H.
发表日期	2019
ISSN	0930-7575
起始页码	4651
结束页码	4665
卷号	53 期号:2020-07-08
英文摘要	The interdecadal basin-wide warming and cooling cycle of the North Atlantic Ocean, known as the Atlantic multidecadal variability (AMV), influences not only the Euro-Atlantic climatic conditions, but also tropical storms and monsoons remotely. However, controversy still remains on the relative importance of external forcing and internal processes for the past AMV. Here, we use three attribution experiments, consisting of five-member ensemble for each, for 1931–2014 by a climate model and show that the temporal variation of the observed AMV can be reproduced in the model forced by historical changes in radiative forcing. Specifically, anthropogenic sulphate emissions are found to explain 46–63% of the forced SST variations at decadal time scales. The spatial pattern of the sea surface temperature (SST) associated with the AMV is also well captured by the model, in which externally forced components dominate and significantly increase precipitation over Europe and the Sahel during positive AMV. An exception is the subpolar region where internally generated SST variability coupled with the North Atlantic Oscillation plays a major role. Under declining scenarios of anthropogenic aerosol emissions, a multi-model ensemble of climate simulations shows that the North Atlantic decadal SST variability will be generated increasingly by internal processes, suggesting a decreasing impact on regional precipitation. © 2019, The Author(s).
英文关键词	Atlantic multidecadal variability; Climate model; Sulphate aerosols
语种	英语
scopus关键词	aerosol; Atlantic Multidecadal Oscillation; climate change; climate modeling; North Atlantic Oscillation; radiative forcing; sea surface temperature; sulfate; Atlantic Ocean; Atlantic Ocean (North)
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145969
作者单位	Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8568, Japan; Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan
推荐引用方式 GB/T 7714	Watanabe M.,Tatebe H.. Reconciling roles of sulphate aerosol forcing and internal variability in Atlantic multidecadal climate changes[J],2019,53(2020-07-08).
APA	Watanabe M.,&Tatebe H..(2019).Reconciling roles of sulphate aerosol forcing and internal variability in Atlantic multidecadal climate changes.Climate Dynamics,53(2020-07-08).
MLA	Watanabe M.,et al."Reconciling roles of sulphate aerosol forcing and internal variability in Atlantic multidecadal climate changes".Climate Dynamics 53.2020-07-08(2019).