干旱区生态环境知识资源中心(Arid): Late Holocene Precipitation Fluctuations in South America Triggered by Variability of the North Atlantic Overturning Circulation

Arid

DOI	10.1029/2021PA004223
	Late Holocene Precipitation Fluctuations in South America Triggered by Variability of the North Atlantic Overturning Circulation
	Bahr, A.; Kaboth-Bahr, S.; Jaeschke, A.; Chiessi, C.; Cruz, F.; Carvalho, L.; Rethemeyer, J.; Schefuss, E.; Geppert, P.; Albuquerque, A. L.; Pross, J.; Friedrich, O.
通讯作者	Bahr, A (corresponding author), Heidelberg Univ, Inst Earth Sci, Heidelberg, Germany.
来源期刊	PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
ISSN	2572-4517
EISSN	2572-4525
出版年	2021
卷号	36 期号:9
英文摘要	Historic droughts document the strong spatio-temporal variability of the South American Monsoon System, which currently provides more than two thirds of the rainfall in tropical South America. The drivers of this variability have remained not well understood due to the lack of continuous, high-resolution paleorecords, especially from the more arid regions of tropical South America. Here we present a novel record of moisture availability across eastern South America for the past similar to 5,000 years from a sediment core retrieved off eastern Brazil. We document distinct decadal- to millennial-scale spatial shifts of major atmospheric convection centers that caused increasingly pronounced droughts in eastern South America over the past similar to 2,000 years. These fluctuations were triggered by climate anomalies in the high northern latitudes and propagated into equatorial latitudes via fluctuations in North Atlantic Overturning Circulation strength. As global warming is expected to decrease oceanic overturning due to enhanced meltwater input into the North Atlantic while at the same time reducing precipitation over eastern South America, an increasing risk for long-lasting droughts can be expected for this region, posing severe socio-economic challenges.
英文关键词	South American Summer Monsoon Holocene South Atlantic Dipole South American Low-Level Jet AMO AMOC
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000705942700007
WOS关键词	DELTA-D VALUES ; CLIMATE VARIATION ; MONSOON RAINFALL ; CONVERGENCE ZONE ; LAST MILLENNIUM ; BRAZIL ; WATER ; IMPACTS ; OCEAN ; SPELEOTHEM
WOS类目	Geosciences, Multidisciplinary ; Oceanography ; Paleontology
WOS研究方向	Geology ; Oceanography ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/364286
作者单位	[Bahr, A.; Kaboth-Bahr, S.; Geppert, P.; Pross, J.; Friedrich, O.] Heidelberg Univ, Inst Earth Sci, Heidelberg, Germany; [Kaboth-Bahr, S.] Univ Potsdam, Inst Earth Sci, Potsdam, Germany; [Jaeschke, A.; Rethemeyer, J.] Univ Cologne, Inst Geol & Mineral, Cologne, Germany; [Chiessi, C.] Univ Sao Paulo, Sch Arts Sci & Humanities, Sao Paulo, Brazil; [Cruz, F.; Albuquerque, A. L.] Univ Sao Paulo, Inst Geosci, Sao Paulo, Brazil; [Carvalho, L.] Univ Calif Santa Barbara, Dept Geog & Earth Res Inst, Santa Barbara, CA USA; [Schefuss, E.] Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany; [Albuquerque, A. L.] Univ Fed Fluminense, Dept Geoquim, Niteroi, RJ, Brazil
推荐引用方式 GB/T 7714	Bahr, A.,Kaboth-Bahr, S.,Jaeschke, A.,et al. Late Holocene Precipitation Fluctuations in South America Triggered by Variability of the North Atlantic Overturning Circulation[J],2021,36(9).
APA	Bahr, A..,Kaboth-Bahr, S..,Jaeschke, A..,Chiessi, C..,Cruz, F..,...&Friedrich, O..(2021).Late Holocene Precipitation Fluctuations in South America Triggered by Variability of the North Atlantic Overturning Circulation.PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY,36(9).
MLA	Bahr, A.,et al."Late Holocene Precipitation Fluctuations in South America Triggered by Variability of the North Atlantic Overturning Circulation".PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY 36.9(2021).