Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence

doi:10.1002/2016PA003039

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence
	Qin, Bingbin 1,3; Li, Tiegang 2,3,4; Xiong, Zhifang 1,2,4; Algeo, Thomas J.5,6; Chang, Fengming 1,4
刊名	PALEOCEANOGRAPHY
	2017-04
卷号	32 期号:4 页码:351-370
关键词	shell weight planktonic foraminifera proxy calibration carbonate chemistry coral reef hypothesis ocean stratification
ISSN号	0883-8305
DOI	10.1002/2016PA003039
英文摘要	We present new size-normalized weight (SNW)-[CO32-] core-top calibrations for three planktonic foraminiferal species and assess their reliability as a paleo-alkalinity proxy. SNWs of Globigerina sacculifer and Neogloboquadrina dutertrei can be used to reconstruct past deep Pacific [CO32-], whereas SNWs of Pulleniatina obliquiloculata are controlled by additional environmental factors. Based on this methodological advance, we reconstruct SNW-based deepwater [CO32-] for core WP7 from the western tropical Pacific since 250ka. Secular variation in the SNW proxy documents little change in deep Pacific [CO32-] between the Last Glacial Maximum and the Holocene. Further back in time, deepwater [CO32-] shows long-term increases from marine isotope stage (MIS) 5e to MIS 3 and from early MIS 7 to late MIS 6, consistent with the coral reef hypothesis that the deep Pacific Ocean carbonate system responded to declining shelf carbonate production during these two intervals. During deglaciations, we have evidence of [CO32-] peaks coincident with Terminations 2 and 3, which suggests that a breakdown of oceanic vertical stratification drove a net transfer of CO2 from the ocean to the atmosphere, causing spikes in carbonate preservation (i.e., the deglacial ventilation hypothesis). During MIS 4, a transient decline in SNW-based [CO32-], along with other reported [CO32-] and/or dissolution records, implies that increased deep-ocean carbon storage resulted in a global carbonate dissolution event. These findings provide new insights into the role of the deep Pacific in the global carbon cycle during the late Quaternary.
资助项目	NSFC[41576051] ; NSFC[41106042]
WOS研究方向	Geology ; Oceanography ; Paleontology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000401142500002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3195]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China; 2.State Ocean Adm, Inst Oceanog 1, Qingdao, Peoples R China; 3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China; 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China; 5.China Univ Geosci, State Key Labs BGEG & GPMR, Wuhan, Peoples R China; 6.Univ Cincinnati, Dept Geol, Cincinnati, OH USA
推荐引用方式 GB/T 7714	Qin, Bingbin,Li, Tiegang,Xiong, Zhifang,et al. Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence[J]. PALEOCEANOGRAPHY,2017,32(4):351-370.
APA	Qin, Bingbin,Li, Tiegang,Xiong, Zhifang,Algeo, Thomas J.,&Chang, Fengming.(2017).Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence.PALEOCEANOGRAPHY,32(4),351-370.
MLA	Qin, Bingbin,et al."Deepwater carbonate ion concentrations in the western tropical Pacific since 250ka: Evidence for oceanic carbon storage and global climate influence".PALEOCEANOGRAPHY 32.4(2017):351-370.