Deep-Water Carbonate Ion Concentrations in the Western Tropical Pacific Since the Mid-Pleistocene: A Major Perturbation During the Mid-Brunhes

doi:10.1029/2018JC014084

	Deep-Water Carbonate Ion Concentrations in the Western Tropical Pacific Since the Mid-Pleistocene: A Major Perturbation During the Mid-Brunhes
	Qin, B.1; Li, T.1,2,3; Xiong, Z.1,2; Algeo, T. J.4,5; Jia, Q.1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2018-09
卷号	123 期号:9 页码:6876-6892
关键词	planktonic foraminifer shell weight carbonate dissolution coral reef hypothesis carbon cycles ocean stratification
ISSN号	2169-9275
DOI	10.1029/2018JC014084
英文摘要	We present a new deep-water carbonate ion concentration ([CO32-]) record, reconstructed from the size-normalized weight of the planktonic foraminifer Neogloboquadrina dutertrei in core MD06-3047B, representing a middepth site (2.5km) in the western tropical Pacific since 700ka. On glacial-interglacial time scales, deep-water [CO32-] exhibits an inverse relationship with global sea-level elevations, consistent with the coral reef hypothesis that the deep Pacific carbonate system responded to variations in shelf-carbonate production through the past 700kyr. On longer time scales, a decoupling between deep-water [CO32-] and C-13 around the globe can be explained by a combination of continental weathering and nutrient inputs. During the mid-Brunhes interval (similar to 600-200ka), [CO32-] reached a maximum of similar to 100molkg(-1) at the marine isotope stage (MIS) 12/11 boundary, followed by a steep decrease to a minimum of similar to 40molkg(-1) during middle MIS 11, representing the largest-amplitude change in [CO32-] over the past 700kyr. The [CO32-] maximum records the largest deglacial oceanic carbon release since 700ka, and the [CO32-] minimum was a response to a global increase in pelagic carbonate production. From MIS 3 to 2 and from early to middle MIS 13, [CO32-] showed rising trends opposite to those at water depths greater than 3.4km, implying enhanced Pacific stratification during these intervals. These findings provide new insights into the Pleistocene evolution of the carbonate system in the Pacific Ocean.
资助项目	National Special Project for Global Change and Air-Sea Interaction[GASI-GEOGE-04]
WOS关键词	GLACIAL-INTERGLACIAL CHANGES ; ATMOSPHERIC CO2 ; EQUATORIAL PACIFIC ; SEA-LEVEL ; SOUTHERN-OCEAN ; NORTH-ATLANTIC ; PLANKTONIC-FORAMINIFERA ; CACO3 COMPENSATION ; SHELL-WEIGHT ; INDIAN-OCEAN
WOS研究方向	Oceanography
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000447552600049
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25986]
专题	自然资源部第一海洋研究所
通讯作者	Li, T.; Xiong, Z.
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 4.Univ Cincinnati, Dept Geol, Cincinnati, OH USA 5.China Univ Geosci, State Key Labs Biogeol & Environm, Geol Proc & Mineral Resources, Wuhan, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Qin, B.,Li, T.,Xiong, Z.,et al. Deep-Water Carbonate Ion Concentrations in the Western Tropical Pacific Since the Mid-Pleistocene: A Major Perturbation During the Mid-Brunhes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2018,123(9):6876-6892.
APA	Qin, B.,Li, T.,Xiong, Z.,Algeo, T. J.,&Jia, Q..(2018).Deep-Water Carbonate Ion Concentrations in the Western Tropical Pacific Since the Mid-Pleistocene: A Major Perturbation During the Mid-Brunhes.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,123(9),6876-6892.
MLA	Qin, B.,et al."Deep-Water Carbonate Ion Concentrations in the Western Tropical Pacific Since the Mid-Pleistocene: A Major Perturbation During the Mid-Brunhes".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 123.9(2018):6876-6892.