DOI: 10.1016/j.quascirev.2014.09.020
Scopus记录号: 2-s2.0-84908229580
论文题名: Constraints on surface seawater oxygen isotope change between the Last Glacial Maximum and the Late Holocene
作者: Waelbroeck C. ; Kiefer T. ; Dokken T. ; Chen M.-T. ; Spero H.J. ; Jung S. ; Weinelt M. ; Kucera M. ; Paul A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 105 起始页码: 102
结束页码: 111
语种: 英语
英文关键词: Last Glacial Maximum
; Paleoceanography
; Planktonic foraminifers
; Surface water oxygen isotopic ratio
Scopus关键词: Foraminifers
; Last Glacial Maximum
; Late Holocene
; Oxygen isotopes
; Oxygen isotopic
; Paleoceanography
; Surface seawater
; data set
; Holocene
; hydrological cycle
; Last Glacial Maximum
; oceanic circulation
; oxygen isotope
; planktonic foraminifera
; precipitation intensity
; sea surface temperature
; Atlantic Ocean
; Atlantic Ocean (North)
; Iberian Margin
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (South)
; South Africa
; Foraminifera
英文摘要: Estimates of the change in surface seawater δ18O (δ18Osw) between the Last Glacial Maximum (LGM) and Late Holocene (LH) are derived from homogenous data sets with rigorous age control, namely MARGO sea surface temperature (SST) estimates and oxygen isotopic ratios (δ18O) of planktonic foraminifers. Propagation of uncertainties associated with each proxy allows the identification of robust patterns of change in δ18Osw. Examination of these patterns on a regional scale highlights which changes in surface currents and hydrological cycle are consistent with both planktonic isotopic data and reconstructed SST. Positive local annual mean LGM-LH δ18Osw anomalies characterize the glacial tropical Indian Ocean, portions of the western and eastern margins of the North Pacific, the Iberian margin and the tropical North Atlantic, as well as the South African margin. Although reduced precipitation during the LGM with respect to the LH may have contributed to some extent to these local enrichments in surface seawater 18O, the largest positive anomalies appear to be related to changes in ocean circulation. Large local negative annual mean LGM-LH δ18Osw anomalies are found in the South Pacific and North Atlantic, reflecting the equatorward migration of surface temperature fronts during the LGM with respect to the LH. In the northern North Atlantic, a region characterized by large discrepancies between SST estimates based on different proxies, only SST estimates based on planktonic foraminifer counts yield annual mean LGM-LH δ18Osw anomalies consistent with a southward shift of the polar front at the LGM relative to the LH. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60109
Appears in Collections: 过去全球变化的重建
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作者单位: LSCE/IPSL, Laboratoire CNRS-CEA-UVSQ, Gif-sur-Yvette, France; PAGES International Project Office, Bern, Switzerland; Uni Research Climate and Bjerknes Centre for Climate Research, Allegaten 55, Bergen, Norway; Institute of Applied Geosciences, National Taiwan Ocean University, Keelung, Taiwan; Department Earth and Planetary Sciences, University of California Davis, Davis, CA, United States; Grant Institute, University of Edinburgh, Edinburgh, United Kingdom; Institute for Geosciences, University of Kiel, Kiel, Germany; MARUM - Center for Marine Environmental Sciences and Department of Geosciences, University Bremen, Bremen, Germany
Recommended Citation:
Waelbroeck C.,Kiefer T.,Dokken T.,et al. Constraints on surface seawater oxygen isotope change between the Last Glacial Maximum and the Late Holocene[J]. Quaternary Science Reviews,2014-01-01,105