Radiocarbon evidence of a North Atlantic intermediate water reconfiguration between the 1960s and 1980s

doi:10.1016/j.epsl.2024.119184

NIGPAS OpenIR

	Radiocarbon evidence of a North Atlantic intermediate water reconfiguration between the 1960s and 1980s
通讯作者	Liu, Qian([email protected])
	Liu, Qian 1,2; Robinson, Laura F.2,3; Hendy, Erica 2; Stewart, Joseph A.2; Li, Tao 1; Chen, Tianyu 4,5; Knowles, Timothy D. J.6
	2025-02-15
发表期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
卷号	652 页码:11
摘要	The Atlantic Meridional Overturning Circulation (AMOC) is a critical modulating component of the Earth's climate system, therefore, documenting the timing and amplitude of AMOC variability since the Industrial Era is essential for understanding future climate. However, there are very few continuous high-resolution records from this time period in the subsurface ocean which restricts us from exploring the nature of changes in the ocean interior. Here, we present new seawater radiocarbon (14C) records of intermediate depth water (between 1400 m and 2000 m) for the Industrial Era since 1830 CE obtained from the calcitic skeleton of four cold-water bamboo corals from the tropical Atlantic. These samples were collected in 2013 with lifespans ranging from 64 to 161 years. No bomb 14C was detected in the calcitic skeleton, indicating that the tropical intermediate North Atlantic had not yet been invaded by bomb 14C at the time of collection. The data show a relatively constant Delta 14C before 1960 CE with a synchronous basin-wide increase in 14C content reached by 1980 CE. The stepwise shift in Delta 14C may be explained by the North Atlantic Deep Water (NADW) becoming shallower in the tropical North Atlantic and/or a southward retreat of Antarctic Intermediate Water (AAIW), in either case potentially linked to a weakening of AMOC. Our study indicates synchronous large-scale oceanic reconfiguration occurred throughout the tropical and North Atlantic starting in the 1960s and that there has been no subsequent return to the state of the pre-mid-20th century oceanic interior.
关键词	Atlantic Meridional Overturning Circulation (AMOC) Cold-water corals (CWCs) Radiocarbon Bomb radiocarbon Tropical Atlantic North Atlantic Deep Water (NADW) Antarctic Intermediate Water (AAIW)
DOI	10.1016/j.epsl.2024.119184
收录类别	SCI
语种	英语
关键词[WOS]	MERIDIONAL OVERTURNING CIRCULATION ; OCEAN BASINS NORTH ; TROPICAL ATLANTIC ; BOMB RADIOCARBON ; ATMOSPHERIC RADIOCARBON ; LABRADOR SEA ; DEEP-WATER ; VENTILATION ; MASSES ; VARIABILITY
资助项目	National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Scholarship Council ; ERC ; NERC[NE/S001743/1] ; NERC[NE/R005117/1] ; [2023YFF0806100] ; [2024M763370] ; [278705]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001400130300001
项目资助者	National Key Research and Development Program of China ; China Postdoctoral Science Foundation ; China Scholarship Council ; ERC ; NERC
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44822
专题	中国科学院南京地质古生物研究所
通讯作者	Liu, Qian
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China 2.Univ Bristol, Sch Earth Sci, Bristol, England 3.Univ York, Dept Environm & Geog, York, England 4.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China 5.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing, Peoples R China 6.Univ Bristol, Bristol Radiocarbon Accelerator Mass Spectrometry, Bristol, England
第一作者单位	中国科学院南京地质古生物研究所
通讯作者单位	中国科学院南京地质古生物研究所
推荐引用方式 GB/T 7714	Liu, Qian,Robinson, Laura F.,Hendy, Erica,et al. Radiocarbon evidence of a North Atlantic intermediate water reconfiguration between the 1960s and 1980s[J]. EARTH AND PLANETARY SCIENCE LETTERS,2025,652:11.
APA	Liu, Qian.,Robinson, Laura F..,Hendy, Erica.,Stewart, Joseph A..,Li, Tao.,...&Knowles, Timothy D. J..(2025).Radiocarbon evidence of a North Atlantic intermediate water reconfiguration between the 1960s and 1980s.EARTH AND PLANETARY SCIENCE LETTERS,652,11.
MLA	Liu, Qian,et al."Radiocarbon evidence of a North Atlantic intermediate water reconfiguration between the 1960s and 1980s".EARTH AND PLANETARY SCIENCE LETTERS 652(2025):11.