Radiocarbon as a thermocline proxy for the eastern equatorial Pacific

被引：28
作者：
Rodgers, KB
Aumont, O
Madec, G
Menkes, C
Blanke, B
Monfray, P
Orr, JC
Schrag, DP
机构：
[1] Univ Paris 06, LODYC, MNHN, IRD,CNRS, F-75252 Paris 05, France
[2] UBO, IFREMER, CNRS, Lab Phys Oceans, F-29285 Brest, France
[3] UPS, IRD, CNES, CNRS,Lab Etud Geophys & Oceanog Spatiales, F-31401 Toulouse 4, France
[4] CEA Saclay, LSCE, CNRS, F-91191 Gif Sur Yvette, France
[5] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 14期
关键词：
D O I：
10.1029/2004GL019764
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
An ocean model is used to test the idea that sea surface Delta(14)C behaves as a thermocline proxy in the eastern equatorial Pacific. The ORCA2 model, which includes Delta(14)C as a passive tracer, has been forced with reanalysis fluxes over 1948-1999, and the output is compared with a previously reported Galapagos Delta(14)C record. The model reproduces the abrupt increase in the seasonally minimum Delta(14)C in 1976/77 found in the data. This increase is associated with neither a shift of thermocline depth over the NINO3 region, nor a change in the relative proportion of Northern/Southern source waters. Rather, it is due to a decrease in the Sub-Antarctic Mode Water (SAMW) component of the upwelling water, thereby representing a decrease in entrainment of water from below the base of the directly ventilated thermocline.
引用
收藏
页码：L143141 / 4
页数：4
相关论文
共 50 条
[21]   Changes in the depth habitat of the Oligocene planktic foraminifera (Dentoglobigerina venezuelana) induced by thermocline deepening in the eastern equatorial Pacific [J].
Matsui, Hiroki ;
Nishi, Hiroshi ;
Takashima, Reishi ;
Kuroyanagi, Azumi ;
Ikehara, Minoru ;
Takayanagi, Hideko ;
Iryu, Yasufumi .
PALEOCEANOGRAPHY, 2016, 31 (06) :715-731
[22]   EQUATORIAL THERMOCLINE [J].
PHILANDER, SG .
DEEP-SEA RESEARCH, 1973, 20 (01) :69-86
[23]   NEAR-BOTTOM THERMOCLINE IN SAMOAN PASSAGE, WEST EQUATORIAL PACIFIC [J].
MACDONAL.KC ;
HOLLISTE.CD .
NATURE, 1973, 244 (5408) :461-462
[24]   Deep-reaching thermocline mixing in the equatorial pacific cold tongue [J].
Liu, Chuanyu ;
Kohl, Armin ;
Liu, Zhiyu ;
Wang, Fan ;
Stammer, Detlef .
NATURE COMMUNICATIONS, 2016, 7
[25]   Revisiting the CMIP5 Thermocline in the Equatorial Pacific and Atlantic Oceans [J].
Castano-Tierno, A. ;
Mohino, E. ;
Rodriguez-Fonseca, B. ;
Losada, T. .
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (23) :12963-12971
[26]   Thermocline state change in the eastern equatorial Pacific during the late Pliocene/early Pleistocene intensification of Northern Hemisphere glaciation [J].
Jakob, Kim Alix ;
Pross, Joerg ;
Scholz, Christian ;
Fiebig, Jens ;
Friedrich, Oliver .
CLIMATE OF THE PAST, 2018, 14 (07) :1079-1095
[27]   A Concise and Effective Expression Relating Subsurface Temperature to the Thermocline in the Equatorial Pacific [J].
Yuan, Xinyi ;
Jin, Fei-Fei ;
Zhang, Wenjun .
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (15)
[28]   Do tropical cells ventilate the Indo-Pacific equatorial thermocline? [J].
Hazeleger, W ;
de Vries, P ;
van Oldenborgh, GJ .
GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (09) :1763-1766
[29]   Deep-reaching thermocline mixing in the equatorial pacific cold tongue [J].
Chuanyu Liu ;
Armin Köhl ;
Zhiyu Liu ;
Fan Wang ;
Detlef Stammer .
Nature Communications, 7
[30]   On the annual cycle of the eastern equatorial pacific [J].
J Clim, 12 pt 1 (2986-2998)
12345