干旱区生态环境知识资源中心(Arid): Centennial-scale precipitation anomalies in the southern Altiplano (18 degrees S) suggest an extratropical driver for the South American summer monsoon during the late Holocene

Arid

DOI	10.5194/cp-15-1845-2019
	Centennial-scale precipitation anomalies in the southern Altiplano (18 degrees S) suggest an extratropical driver for the South American summer monsoon during the late Holocene
	Jara, Ignacio A.1; Maldonado, Antonio 1,2,3; Gonzalez, Leticia 4; Hernandez, Armand 5; Saez, Alberto 6; Giralt, Santiago 5; Bao, Roberto 7; Valero-Garces, Blas 8,9
通讯作者	Maldonado, Antonio
来源期刊	CLIMATE OF THE PAST
ISSN	1814-9324
EISSN	1814-9332
出版年	2019
卷号	15 期号:5 页码:1845-1859
英文摘要	Modern precipitation anomalies in the Altiplano, South America, are closely linked to the strength of the South American summer monsoon (SASM), which is influenced by large-scale climate features sourced in the tropics such as the Intertropical Convergence Zone (ITCZ) and El Nino-Southern Oscillation (ENSO). However, the timing, direction, and spatial extent of precipitation changes prior to the instrumental period are still largely unknown, preventing a better understanding of the long-term drivers of the SASM and their effects over the Altiplano. Here we present a detailed pollen reconstruction from a sedimentary sequence covering the period between 4500 and 1000 cal yr BP in Lago Chungara (18 degrees S; 4570 m a.s.l.), a high-elevation lake on the southwestern margin of the Altiplano where precipitation is delivered almost exclusively during the mature phase of the SASM over the austral summer. We distinguish three well-defined centennial-scale anomalies, with dry conditions between 4100-3300 and 1600-1000 cal yr BP and a conspicuous humid interval between 2400 and 1600 cal yr BP, which resulted from the weakening and strengthening of the SASM, respectively. Comparisons with other climate reconstructions from the Altiplano, the Atacama Desert, the tropical Andes, and the southwestern Atlantic coast reveal that - unlike modern climatological controls - past precipitation anomalies at Lago Chungara were largely decoupled from north-south shifts in the ITCZ and ENSO. A regionally coherent pattern of centennial-scale SASM variations and a significant latitudinal gradient in precipitation responses suggest the contribution of an extratropical moisture source for the SASM, with significant effects on precipitation variability in the southern Altiplano.
类型	Article
语种	英语
国家	Chile ; Spain
开放获取类型	Green Submitted, gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000490856400001
WOS关键词	CENTRAL ANDEAN PLATEAU ; NORTHERN CHILE ; ATACAMA DESERT ; ISOTOPIC COMPOSITION ; BOLIVIAN ALTIPLANO ; TROPICAL PACIFIC ; CONVERGENCE ZONE ; CLIMATE HISTORY ; LAKE TITICACA ; VARIABILITY
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214923
作者单位	1.CEAZA, La Serena, Chile; 2.Univ La Serena, Inst Invest Multidisciplinario Ciencia & Tecnol, La Serena, Chile; 3.Univ Catolica Norte, Dept Biol Marina, Larrondo 1281, Coquimbo, Chile; 4.Municipalidad San Pedro de Atacama, Gustavo Padre de Paige 328, San Pedro De Atacama, Chile; 5.CSIC, Inst Ciencias Tierra Jaume Almera, Barcelona, Spain; 6.Univ Barcelona, Dept Dinam Terra & Ocea, Barcelona, Spain; 7.Univ A Coruna, Fac Ciencias, CICA, La Coruna, Spain; 8.CSIC, Inst Pirenaico Ecol, Zaragoza, Spain; 9.UFRJ, PUC, CSIC, Lab Int Cambio Global, Zaragoza, Spain
推荐引用方式 GB/T 7714	Jara, Ignacio A.,Maldonado, Antonio,Gonzalez, Leticia,et al. Centennial-scale precipitation anomalies in the southern Altiplano (18 degrees S) suggest an extratropical driver for the South American summer monsoon during the late Holocene[J],2019,15(5):1845-1859.
APA	Jara, Ignacio A..,Maldonado, Antonio.,Gonzalez, Leticia.,Hernandez, Armand.,Saez, Alberto.,...&Valero-Garces, Blas.(2019).Centennial-scale precipitation anomalies in the southern Altiplano (18 degrees S) suggest an extratropical driver for the South American summer monsoon during the late Holocene.CLIMATE OF THE PAST,15(5),1845-1859.
MLA	Jara, Ignacio A.,et al."Centennial-scale precipitation anomalies in the southern Altiplano (18 degrees S) suggest an extratropical driver for the South American summer monsoon during the late Holocene".CLIMATE OF THE PAST 15.5(2019):1845-1859.