DOI: 10.1016/j.quascirev.2018.06.023
Scopus记录号: 2-s2.0-85049529702
论文题名: Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial
作者: Haddam N.A. ; Siani G. ; Michel E. ; Kaiser J. ; Lamy F. ; Duchamp-Alphonse S. ; Hefter J. ; Braconnot P. ; Dewilde F. ; Isgüder G. ; Tisnerat-Laborde N. ; Thil F. ; Durand N. ; Kissel C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 194 起始页码: 62
结束页码: 76
语种: 英语
英文关键词: Bipolar seesaw
; Last 22 kyr cal. BP
; Patagonian ice sheet melting
; Sea surface salinity
; Sea surface temperature latitudinal gradient
; Subtropical front
Scopus关键词: Atmospheric movements
; Atmospheric temperature
; Climate models
; Fighter aircraft
; Glacial geology
; Glaciers
; Heat transfer
; Submarine geophysics
; Surface properties
; Surface waters
; Water
; Bipolar seesaw
; Ice sheet melting
; Latitudinal gradients
; Sea surface salinity
; Subtropical front
; Oceanography
; deep-sea sediment
; deglaciation
; freshwater input
; heat transfer
; Holocene
; ice sheet
; intertropical convergence zone
; late glacial
; latitudinal gradient
; planktonic foraminifera
; precipitation (climatology)
; reconstruction
; sea surface salinity
; sea surface temperature
; subtropical region
; Atlantic Ocean
; Chile
; Pacific Ocean
; Pacific Ocean (South)
; Pacific Ocean (Southeast)
英文摘要: The comparison between different climate model simulations of water hosing experiments under glacial conditions points toward diverging responses in Sea Surface Temperature changes (SST) especially in the Southeast Pacific (SEP). This suggests that reconstituting the latitudinal SST gradient in the SEP is a critical parameter for a better understanding of the mechanisms behind the abrupt climatic events since the last glacial period. Here we present, high-resolution records of SST, using planktonic foraminiferal assemblages and alkenone temperature reconstructions and stable oxygen and carbon isotopes from three deep-sea sediment cores along a latitudinal transect off the southern Chilean coast. This allowed us to reconstruct the variations of the latitudinal SST gradient and the Subtropical Front movements in the SEP. The SST results suggest a clear Antarctic timing consistent with the bipolar seesaw control, especially during the late glacial and the deglaciation. Our records do not suggest a complete oceanic heat transfer signal, highlighting the implication of an atmospheric component in the heat transfers between the two hemispheres, controlled by the latitudinal movements of the intertropical convergence zone in the Atlantic and the associated weaker South Pacific westerly split jet. Furthermore, our records indicate variable conditions during the Holocene, and also emphasize the influence of local fresh water inputs from the Patagonian ice sheet and/or precipitation on the SST fresh water input estimates along the Chilean margin (North and South of 49° S) from the onset of the deglaciation until 8 kyr cal. BP. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112105
Appears in Collections: 气候减缓与适应
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作者单位: GEOPS, Universities of Paris Sud and Paris-Saclay, CNRS, Orsay, 91405, France; LSCE/IPSL Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Université Paris-Saclay, Bât. 12, avenue de la Terrasse, Gif-sur-Yvette CEDEX, F-91198, France; Leibniz Institute for Baltic Sea Research, Seestrasse 15, Rostock, D-18119, Germany; Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, D-27515, Germany; Laboratoire de Mesure du Carbone 14 (LMC14), Bât. 450 port 4E, CEA Saclay, Gif-sur-Yvette CEDEX, 91191, France
Recommended Citation:
Haddam N.A.,Siani G.,Michel E.,et al. Changes in latitudinal sea surface temperature gradients along the Southern Chilean margin since the last glacial[J]. Quaternary Science Reviews,2018-01-01,194