气候变化领域集成服务门户(CCPortal): Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic

CCPortal

DOI	10.1073/pnas.1614693114
	Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic
	Keigwin L.D.; Swift S.A.
发表日期	2017
ISSN	0027-8424
起始页码	2831
结束页码	2835
卷号	114 期号:11
英文摘要	Edited by Edward A. Boyle, Massachusetts Institute of Technology, Cambridge, MA, and approved December 21, 2016 (received for review September 1, 2016) The prevailing view of western Atlantic hydrography during the Last Glacial Maximum (LGM) calls for transport and intermixing of deep southern and intermediate northern end members. However, δ13C and δ 14C results on foraminifera from a sediment core at 5.0 km in the northern subtropics show that there may have also been a northern source of relatively young, very dense, nutrientdepleted water during the LGM (18 ky to 21 ky ago). These results, when integrated with data from other western North Atlantic locations, indicate that the ocean was poorly ventilated at 4.2 km, with better ventilation above and below that depth. If this is a signal of water mass source and not nutrient storage, it would indicate that a previously unrecognized deep water end member originated along the western margin of the Labrador Sea, analogous to dense water formation today around Antarctica and in the Okhotsk Sea.
语种	英语
scopus关键词	carbon; water; air conditioning; Article; climate; glacier; last glacial maximum; mass; North Atlantic deep water; priority journal; sea
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159066
作者单位	Keigwin, L.D., Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, M.A. 02543, United States; Swift, S.A., Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, M.A. 02543, United States
推荐引用方式 GB/T 7714	Keigwin L.D.,Swift S.A.. Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic[J],2017,114(11).
APA	Keigwin L.D.,&Swift S.A..(2017).Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic.Proceedings of the National Academy of Sciences of the United States of America,114(11).
MLA	Keigwin L.D.,et al."Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic".Proceedings of the National Academy of Sciences of the United States of America 114.11(2017).