Possible linkage between the long-eccentricity marine carbon cycle and the deep-Pacific circulation: Western equatorial Pacific benthic foraminifera evidences of the last 4 Ma

doi:10.1016/j.marmicro.2019.101797

	Possible linkage between the long-eccentricity marine carbon cycle and the deep-Pacific circulation: Western equatorial Pacific benthic foraminifera evidences of the last 4 Ma
	Dang, Haowen 1; Peng, Nana 1; Ma, Xiaolin 2; Wan, Sui 3; Jian, Zhimin 1
刊名	MARINE MICROPALEONTOLOGY
	2020-03-01
卷号	155 页码:13
关键词	Long eccentricity cycle Carbon cycle Pacific deep circulation Pliocene Pleistocene
ISSN号	0377-8398
DOI	10.1016/j.marmicro.2019.101797
通讯作者	Dang, Haowen(hwdang@tongji.edu.cn)
英文摘要	The similar to 400-kyr period of marine carbon isotope records, in concert with the long eccentricity cycle, is a meaningful signature of the global carbon cycle, and this period was prolonged to similar to 500 kyr in the last similar to 1.6 Ma. The cause of the elongation of the long-eccentricity carbon cycle at similar to 1.6 Ma has not been fully understood, partly due to the conundrum of its relationship to changes in the circulation of deep-water masses. In this study, we present the benthic foraminifera delta C-13 and delta O-18 and the relative abundances of selected benthic foraminifera, from the upper similar to 80 m of Site U1489 of IODP Expedition 363. First, we established an age model for our samples, covering the last 4 Ma, based on the correlation of benthic foraminifera delta O-18 to the LR04 global stack as well as ship-board magneto-stratigraphy. Then we compared the delta O-18 and delta C-13 between Cibicidoides and Uvigerina to reconfirm the inter-genus isotopic adjustments. The coarse fraction, benthic foraminifera delta C-13 and the abundances of selected benthic species/genera show detectable 400-500 kyr cycles, with minimal coarse fraction and maximal delta C-13 around eccentricity minima. The variations in the relative abundances of selected benthic foraminifera, especially Favocassidulina favus, and the comparisons among deep-Pacific delta C-13 records, reveal a shift to a more sluggish mode of Pacific deep-water circulation occurring coincidently at similar to 1.6 Ma. Therefore, it may be implied that the lengthening of the long-term delta C-13 cycle at similar to 1.6 Ma is linked to a deep Pacific circulation change that prolonged the cycling of carbon in the ocean.
资助项目	NSF China[41606049] ; NSF China[41630965] ; NSF China[91958208] ; NSF China[91858106] ; MNR China[GASI-GEOGE-04] ; MOST China[2018YFE0202401]
WOS关键词	SOUTH CHINA SEA ; PALEOCEANOGRAPHIC CHANGES ; WATER CIRCULATION ; ASIAN MONSOON ; INDIAN-OCEAN ; CYCLICITY ; RESERVOIR ; CLOSURE ; RECORD
WOS研究方向	Paleontology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000517848800008
资助机构	NSF China ; MNR China ; MOST China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/12687]
专题	地球环境研究所_古环境研究室
通讯作者	Dang, Haowen
作者单位	1.Tongji Univ, State Key Lab Marine Geol, Shanghai, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China 3.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Dang, Haowen,Peng, Nana,Ma, Xiaolin,et al. Possible linkage between the long-eccentricity marine carbon cycle and the deep-Pacific circulation: Western equatorial Pacific benthic foraminifera evidences of the last 4 Ma[J]. MARINE MICROPALEONTOLOGY,2020,155:13.
APA	Dang, Haowen,Peng, Nana,Ma, Xiaolin,Wan, Sui,&Jian, Zhimin.(2020).Possible linkage between the long-eccentricity marine carbon cycle and the deep-Pacific circulation: Western equatorial Pacific benthic foraminifera evidences of the last 4 Ma.MARINE MICROPALEONTOLOGY,155,13.
MLA	Dang, Haowen,et al."Possible linkage between the long-eccentricity marine carbon cycle and the deep-Pacific circulation: Western equatorial Pacific benthic foraminifera evidences of the last 4 Ma".MARINE MICROPALEONTOLOGY 155(2020):13.