Ventilation of the Deep Southern Ocean and Deglacial CO2 Rise

被引：390

作者：

Skinner, L. C. ^{[1
]}

Fallon, S. ^{[2
]}

Waelbroeck, C. ^{[3
]}

Michel, E. ^{[3
]}

Barker, S. ^{[4
]}

机构：

[1] Univ Cambridge, Dept Earth Sci, Godwin Lab Palaeoclimate Res, Cambridge CB2 3EQ, England

[2] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia

[3] UVSQ, CEA, Lab CNRS,Inst Pierre Simon Laplace, Lab Sci Climat & Environm, F-91198 Gif Sur Yvette, France

[4] Cardiff Univ, Sch Earth & Ocean Sci, Cardiff CF10 3YE, S Glam, Wales

来源：

SCIENCE | 2010年 / 328卷 / 5982期

基金：

英国自然环境研究理事会;

关键词：

ATMOSPHERIC CO2; CARBON-CYCLE; ICE CORES; LAST; CALIBRATION; ATLANTIC; EVENTS; KYR; VARIABILITY; TRANSPORT;

D O I：

10.1126/science.1183627

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Past glacial-interglacial increases in the concentration of atmospheric carbon dioxide (CO2) are thought to arise from the rapid release of CO2 sequestered in the deep sea, primarily via the Southern Ocean. Here, we present radiocarbon evidence from the Atlantic sector of the Southern Ocean that strongly supports this hypothesis. We show that during the last glacial period, deep water circulating around Antarctica was more than two times older than today relative to the atmosphere. During deglaciation, the dissipation of this old and presumably CO2-enriched deep water played an important role in the pulsed rise of atmospheric CO2 through its variable influence on the upwelling branch of the Antarctic overturning circulation.

引用

页码：1147 / 1151

页数：5

共 28 条

[1] Atmospheric CO2 and climate on millennial time scales during the last glacial period [J].

Ahn, Jinho ;

Brook, Edward J. .

SCIENCE, 2008, 322 (5898) :83-85

[2] Wind-Driven Upwelling in the Southern Ocean and the Deglacial Rise in Atmospheric CO2 [J].

Anderson, R. F. ;

Ali, S. ;

Bradtmiller, L. I. ;

Nielsen, S. H. H. ;

Fleisher, M. Q. ;

Anderson, B. E. ;

Burckle, L. H. .

SCIENCE, 2009, 323 (5920) :1443-1448

[3] Interhemispheric Atlantic seesaw response during the last deglaciation [J].

Barker, Stephen ;

Diz, Paula ;

Vautravers, Maryline J. ;

Pike, Jennifer ;

Knorr, Gregor ;

Hall, Ian R. ;

Broecker, Wallace S. .

NATURE, 2009, 457 (7233) :1097-U50

[4] A 190% drop in atmosphere's Δ14 C during the "Mystery Interval" (17.5 to 14.5 kyr) [J].

Broecker, Wallace ;

Barker, Stephen .

EARTH AND PLANETARY SCIENCE LETTERS, 2007, 256 (1-2) :90-99

[5] Near constancy of the Pacific Ocean surface to mid-depth radiocarbon-age difference over the last 20 kyr [J].

Broecker, Wallace ;

Clark, Elizabeth ;

Barker, Stephen .

EARTH AND PLANETARY SCIENCE LETTERS, 2008, 274 (3-4) :322-326

[6] The sequence of events surrounding Termination II and their implications for the cause of glacial-interglacial CO2 changes [J].

Broecker, WS ;

Henderson, GM .

PALEOCEANOGRAPHY, 1998, 13 (04) :352-364

[7] Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/234U/238U and 14C dates on pristine corals [J].

Fairbanks, RG ;

Mortlock, RA ;

Chiu, TC ;

Cao, L ;

Kaplan, A ;

Guilderson, TP ;

Fairbanks, TW ;

Bloom, AL ;

Grootes, PM ;

Nadeau, MJ .

QUATERNARY SCIENCE REVIEWS, 2005, 24 (16-17) :1781-1796

[8] Reconstruction of millennial changes in dust emission, transport and regional sea ice coverage using the deep EPICA ice cores from the Atlantic and Indian Ocean sector of Antarctica [J].

Fischer, Hubertus ;

Fundel, Felix ;

Ruth, Urs ;

Twarloh, Birthe ;

Wegner, Anna ;

Udisti, Roberto ;

Becagli, Silvia ;

Castellano, Emiliano ;

Morganti, Andrea ;

Severi, Mirko ;

Wolff, Eric ;

Littot, Genevieve ;

Roethlisberger, Regine ;

Mulvaney, Rob ;

Hutterli, Manuel A. ;

Kaufmann, Patrik ;

Federer, Urs ;

Lambert, Fabrice ;

Bigler, Matthias ;

Hansson, Margareta ;

Jonsell, Ulf ;

de Angelis, Martine ;

Boutron, Claude ;

Siggaard-Andersen, Marie-Louise ;

Steffensen, Jorgen Peder ;

Barbante, Carlo ;

Gaspari, Vania ;

Gabrielli, Paolo ;

Wagenbach, Dietmar .

EARTH AND PLANETARY SCIENCE LETTERS, 2007, 260 (1-2) :340-354

[9] Carbon dioxide release from the North Pacific abyss during the last deglaciation [J].

Galbraith, Eric D. ;

Jaccard, Samuel L. ;

Pedersen, Thomas F. ;

Sigman, Daniel M. ;

Haug, Gerald H. ;

Cook, Mea ;

Southon, John R. ;

Francois, Roger .

NATURE, 2007, 449 (7164) :890-U9

[10] Marine-derived 14C calibration and activity record for the past 50,000 years updated from the Cariaco Basin [J].

Hughen, K. ;

Southon, J. ;

Lehman, S. ;

Bertrand, C. ;

Turnbull, J. .

QUATERNARY SCIENCE REVIEWS, 2006, 25 (23-24) :3216-3227

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