气候变化领域集成服务门户(CCPortal): The South Atlantic sub-tropical dipole mode since the last deglaciation and changes in rainfall

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DOI	10.1007/s00382-020-05468-z
	The South Atlantic sub-tropical dipole mode since the last deglaciation and changes in rainfall
	Wainer I.; Prado L.F.; Khodri M.; Otto-Bliesner B.
发表日期	2020
ISSN	0930-7575
英文摘要	The South Atlantic subtropical dipole (SASD) has an impact on South American rainfall particular during its negative phase when continental precipitation in the northern part of the continent is enhanced. Relying on a series of single forcing transient simulations since the last deglaciation, we differentiate the relative role of meltwater, orbital, ice-sheets and greenhouse gases on the variability of rainfall in South America and links to the SASD. Results indicate that the meltwater forcing is the predominant driver of SASD variability. Wavelet analysis shows that most of the energy for the SASD at lower frequencies (∼ 5 kyr) comes from the meltwater discharge at cold events such as the Heinrich-1 cooling ∼ 17 ka and the Younger-Dryas ∼ 12.9 ka. Large rainfall changes in Northeastern Brazil can be attributed to changes in the South Atlantic sea surface temperature latitudinal gradient and South Atlantic Northward heat transport driven by the meltwater discharge. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Last deglaciation; South America; South Atlantic subtropical mode
语种	英语
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/145702
作者单位	Inst. Oceanography, University of São Paulo (IOUSP), São Paulo, Brazil; Inst. Geosciences, University of Brasilia, Brazil - now at IOUSP, University of São Paulo, São Paulo, Brazil; LOCEAN/IRD/IPSL - Sorbonne University, Paris, France; Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO 80307, United States
推荐引用方式 GB/T 7714	Wainer I.,Prado L.F.,Khodri M.,et al. The South Atlantic sub-tropical dipole mode since the last deglaciation and changes in rainfall[J],2020.
APA	Wainer I.,Prado L.F.,Khodri M.,&Otto-Bliesner B..(2020).The South Atlantic sub-tropical dipole mode since the last deglaciation and changes in rainfall.Climate Dynamics.
MLA	Wainer I.,et al."The South Atlantic sub-tropical dipole mode since the last deglaciation and changes in rainfall".Climate Dynamics (2020).