Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts

doi:10.1016/j.quascirev.2020.106655

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts
	Utida, Giselle 10; Cruz, Francisco W.10; Santos, Roberto V.11; Sawakuchi, Andre O.10; Wang, Hong 12; Pessenda, Luiz C. R.2; Novello, Valdir F.10; Vuille, Mathias 1; Strauss, Andre M.3; Borella, Ana Claudia 3
刊名	QUATERNARY SCIENCE REVIEWS
	2020-12-15
卷号	250 页码:18
关键词	Stable isotopes ITCZ Speleothems Holocene Northeastern Brazil Archaeology Demographic impacts
ISSN号	0277-3791
DOI	10.1016/j.quascirev.2020.106655
通讯作者	Utida, Giselle(giselleutida@hotmail.com)
英文摘要	Changes in insolation driven by precession and obliquity are considered the major driver of tropical precipitation on orbital time scales, and responsible for vegetation and physical landscape changes during the Late Holocene over tropical South America. Here we investigate the environmental changes in the karst region of Chapada do Apodi - Northeastern Brazil (NEB), using a multi-proxy approach including carbon (delta C-13), oxygen (delta O-18) and strontium (Sr-87/Sr-86) isotopic analyses on speleothems from different caves, carbonate bedrock, and clastic cave deposits. This approach reveals that the balance between soil formation and erosion and their alternating impact on vegetation and precipitation changes occurred in response to variations in the position and intensity of the Intertropical Convergence Zone (ITCZ) over the region. The high delta C-13 and delta O-18 and low Sr-87/Sr-86 values at 4,200 yrs BP indicate a massive episode of soil erosion, resulting in the exposure of carbonate bedrocks over a large area of the karst terrain. This event marks the beginning of the Meghalayan chronozone, characterized as the aridification of this region, decline in soil production, drying out of underground drainages, and increased dominance of dry-adapted flora species, characteristic of a more open vegetation (caatinga). We investigated if the Holocene climatic changes affected human occupation in the NEB and found that the overall demographic course is virtually identical to the well-established curve characterized by population deflation during Middle Holocene. (C) 2020 Elsevier Ltd. All rights reserved.
资助项目	FAPESP, Brazil through PIRE NSF-FAPESP[2017/50085-3] ; FAPESP, Brazil through PIRE NSF-FAPESP[2020/02737-4] ; FAPESP, Brazil through PIRE NSF-FAPESP[2016/15807-5] ; FAPESP, Brazil through PIRE NSF-FAPESP[2017/16451-2] ; FAPESP, Brazil through PIRE NSF-FAPESP[2019/12981-2] ; FAPESP, Brazil through PIRE NSF-FAPESP[2019/15914-4] ; NSF, United States[AGS-1303828] ; NSF, United States[OISE-1743738] ; NSF, United States[1103403] ; NSFC, China[NSFC 41888101] ; CNPq, Brazil[423573/2018-7] ; CNPq, Brazil[308769/2018-0] ; CAPES, Brazil[88887.310301/2018-00] ; CAPES
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000595946300006
资助机构	FAPESP, Brazil through PIRE NSF-FAPESP ; NSF, United States ; NSFC, China ; CNPq, Brazil ; CAPES, Brazil ; CAPES
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15689]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Utida, Giselle
作者单位	1.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY USA 2.Univ Sao Paulo, 14C Lab, Piracicaba, SP, Brazil 3.Univ Sao Paulo, Museu Arqueol & Etnol, Sao Paulo, SP, Brazil 4.Univ Fed Fluminense, Dept Geoquim, Niteroi, RJ, Brazil 5.Univ Fed Parana, Dept Geol, Curitiba, Parana, Brazil 6.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710054, Peoples R China 7.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 8.Inst Karst Geol, Key Lab Karst Dynam, MLR, CAGS, Guilin 541004, Peoples R China 9.Univ Minnesota, Dept Earth Sci, Minneapolis, MN USA 10.Univ Sao Paulo, Inst Geociencias, Rua Lago 562, BR-05508090 Sao Paulo, SP, Brazil
推荐引用方式 GB/T 7714	Utida, Giselle,Cruz, Francisco W.,Santos, Roberto V.,et al. Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts[J]. QUATERNARY SCIENCE REVIEWS,2020,250:18.
APA	Utida, Giselle.,Cruz, Francisco W..,Santos, Roberto V..,Sawakuchi, Andre O..,Wang, Hong.,...&Edwards, R. Lawrence.(2020).Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts.QUATERNARY SCIENCE REVIEWS,250,18.
MLA	Utida, Giselle,et al."Climate changes in Northeastern Brazil from deglacial to Meghalayan periods and related environmental impacts".QUATERNARY SCIENCE REVIEWS 250(2020):18.