globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2017.03.026
Scopus记录号: 2-s2.0-85016817719
论文题名:
Last Interglacial (MIS5e) hydrographic shifts linked to meltwater discharges from the East Greenland margin
作者: Zhuravleva A.; Bauch H.A.; Van Nieuwenhove N.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 164
起始页码: 95
结束页码: 109
语种: 英语
英文关键词: East Greenland Current (EGC) ; Greenland Ice Sheet (GIS) ; Last Interglacial ; MIS5e ; Nordic Seas
Scopus关键词: Glaciers ; Water ; East greenland currents ; Greenland Ice Sheet ; Last interglacial ; MIS5e ; Nordic seas ; Glacial geology ; cooling ; freshwater input ; GIS ; hydrograph ; interglacial ; Last Interglacial ; marine isotope stage ; meltwater ; oxygen isotope ; Arctic ; Arctic Ocean ; Atlantic Ocean ; Atlantic Ocean (North) ; East Greenland Current ; Greenland ; Greenland Ice Sheet ; Iceland Shelf ; Labrador Sea ; Norwegian Sea
英文摘要: Proximal evidence of the surface ocean response to size reduction of the Greenland Ice Sheet (GIS) during the Last Interglacial (MIS5e) and preceding glacial termination (T2) remains largely elusive. Using a new sediment record from the western Iceland Sea, the behavior of the northeastern GIS and its relation to the subpolar North Atlantic surface hydrography is examined. Extremely light oxygen isotopic (δ18O) values are found off central East Greenland during early MIS5e and point to enhanced meltwater release, potentially from the northeastern sector of the GIS. Data from downstream the cold East Greenland Current (EGC) and its eastward branches suggest a far-reaching effect of this meltwater not only in the Nordic Seas but also in the SE Labrador Sea. In particular, whereas an early MIS5e warming (at ∼128.5–126.5 ka) in the two regions coincided with the relative reduction of meltwater input into the EGC, the subsequent cooling noted at ∼126.5 ka followed a renewed major freshwater event off central East Greenland. Our data further indicate persistent freshwater influence from the East Greenland margin over the entire MIS5e interval and, in addition, also reveal a late MIS5e meltwater event. The latter event occurred just prior to the last glacial inception and emphasizes the importance of Greenland meltwater as forcing factor on Interglacial climates. © 2017 Elsevier Ltd
资助项目: We are grateful to N. Irvali (University of Bergen, Norway) for providing the data for core MD03-2664. M.-S. Seidenkrantz (Aarhus University, Denmark) is thanked for sharing the faunal data on core HU90-013-013. We are also thankful to S. Fessler (GEOMAR) for performing measurements on stable isotopes. The manuscript benefited from the constructive comments and suggestions made by 3 anonymous reviewers. A.Z. acknowledges the German Federal Ministry of Education and Research (BMBF) for supporting the project “Laptev-Sea: TRANSDRIFT” (BMBF grant 03G0833C). Additional financial support to A.Z. was provided by the German Research Foundation (DFG grant BA1367/12-1), to N.V.N. and H.A.B. by DFG project NI1248/1.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59251
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作者单位: Academy of Sciences, Humanities, and Literature, Mainz c/o GEOMAR Helmholtz Centre for Ocean Research, Wischhofstrasse 1-3, Kiel, Germany; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research c/o GEOMAR Helmholtz Centre for Ocean Research, Wischhofstrasse 1-3, Kiel, Germany; Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, Aarhus C, DK, Denmark; Department of Glaciology and Climate, Geological Survey of Denmark and Greenland, Øster Voldgade 10, Copenhagen, Denmark

Recommended Citation:
Zhuravleva A.,Bauch H.A.,Van Nieuwenhove N.. Last Interglacial (MIS5e) hydrographic shifts linked to meltwater discharges from the East Greenland margin[J]. Quaternary Science Reviews,2017-01-01,164
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