Atlantic Circulation and Ice Sheet Influences on Upper South Atlantic Temperature During the Last Deglaciation | |
Umling, N. E.1,2; Oppo, D. W.1; Chen, P.3; Yu, J.3; Liu, Z.4; Yan, M.5,6,7; Gebbie, G.8; Lund, D. C.9; Pietro, K. R.1; Jin, Z. D.10; Huang, K-F1,11; Costa, K. B.12; Toledo, F. A. L.12 | |
通讯作者 | Umling, N. E.(numling@amnh.org) |
2019-06-01 | |
发表期刊 | PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY |
ISSN | 2572-4517 |
卷号 | 34期号:6页码:990-1005 |
摘要 | Atlantic Meridional Overturning Circulation (AMOC) disruption during the last deglaciation is hypothesized to have caused large subsurface ocean temperature anomalies, but records from key regions are not available to test this hypothesis, and other possible drivers of warming have not been fully considered. Here, we present the first reliable evidence for subsurface warming in the South Atlantic during Heinrich Stadial 1, confirming the link between large-scale heat redistribution and AMOC. Warming extends across the Bolling-Allerod despite predicted cooling at this time, thus spanning intervals of both weak and strong AMOC indicating another forcing mechanism that may have been previously overlooked. Transient model simulations and quasi-conservative water mass tracers suggest that reduced northward upper ocean heat transport was responsible for the early deglacial (Heinrich Stadial 1) accumulation of heat at our shallower (similar to 1,100 m) site. In contrast, the results suggest that warming at our deeper site (similar to 1,900 m) site was dominated by southward advection of North Atlantic middepth heat anomalies. During the Bolling-Allerod, the demise of ice sheets resulted in oceanographic changes in the North Atlantic that reduced convective heat loss to the atmosphere, causing subsurface warming that overwhelmed the cooling expected from an AMOC reinvigoration. The data and simulations suggest that rising atmospheric CO2 did not contribute significantly to deglacial subsurface warming at our sites. |
DOI | 10.1029/2019PA003558 |
关键词[WOS] | WATER MASS GEOMETRY ; ATMOSPHERIC CO2 ; CARBON-ISOTOPE ; OCEAN CIRCULATION ; NORTH-ATLANTIC ; OVERTURNING CIRCULATION ; BENTHIC FORAMINIFERA ; INTERMEDIATE WATERS ; GLACIAL MAXIMUM ; CLIMATE |
收录类别 | SCI ; SCI |
语种 | 英语 |
资助项目 | U.S. National Science Foundation[OCE15-558341] ; Investment in Science Fund at the Woods Hole Oceanographic Institution ; Australian Research Council[FT140100993] |
WOS研究方向 | Geology ; Oceanography ; Paleontology |
项目资助者 | U.S. National Science Foundation ; Investment in Science Fund at the Woods Hole Oceanographic Institution ; Australian Research Council |
WOS类目 | Geosciences, Multidisciplinary ; Oceanography ; Paleontology |
WOS记录号 | WOS:000474863700007 |
出版者 | AMER GEOPHYSICAL UNION |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/13709 |
专题 | 加速器质谱中心 |
通讯作者 | Umling, N. E. |
作者单位 | 1.Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA 2.Amer Museum Nat Hist, Dept Earth & Planetary Sci, New York, NY 10024 USA 3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia 4.Ohio State Univ, Dept Geog, Columbus, OH 43210 USA 5.Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, State Key Lab Geog Environm Evolut,Jiangsu Prov C, Nanjing, Jiangsu, Peoples R China 6.Nanjing Normal Univ, Sch Geog Sci, Nanjing, Jiangsu, Peoples R China 7.Jiangsu Ctr Collaborat Innovat Geog Informat Reso, Nanjing, Jiangsu, Peoples R China 8.Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA 9.Univ Connecticut, Dept Marine Sci, Storrs, CT USA 10.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 11.Acad Sinica, Inst Earth Sci, Taipei, Taiwan 12.Univ Sao Paulo, Oceanog Inst, Sao Paulo, Brazil |
推荐引用方式 GB/T 7714 | Umling, N. E.,Oppo, D. W.,Chen, P.,et al. Atlantic Circulation and Ice Sheet Influences on Upper South Atlantic Temperature During the Last Deglaciation[J]. PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY,2019,34(6):990-1005. |
APA | Umling, N. E..,Oppo, D. W..,Chen, P..,Yu, J..,Liu, Z..,...&Toledo, F. A. L..(2019).Atlantic Circulation and Ice Sheet Influences on Upper South Atlantic Temperature During the Last Deglaciation.PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY,34(6),990-1005. |
MLA | Umling, N. E.,et al."Atlantic Circulation and Ice Sheet Influences on Upper South Atlantic Temperature During the Last Deglaciation".PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY 34.6(2019):990-1005. |
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