FN Archimer Export Format
PT J
TI Sequestration of carbon in the deep Atlantic during the last glaciation
BT 
AF YU, J.
   MENVIEL, L.
   JIN, Z. D.
   THORNALLEY, D. J. R.
   BARKER, S.
   MARINO, G.
   ROHLING, E. J.
   CAI, Y.
   ZHANG, F.
   WANG, X.
   DAI, Y.
   CHEN, P.
   BROECKER, W. S.
AS 1:1;2:2,3;3:4;4:5;5:6;6:1;7:1,7;8:4;9:4;10:8;11:1;12:1,9;13:10;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Australian Natl Univ, Res Sch Earth Sci, GPO Box 4, Canberra, ACT 2601, Australia.
   Univ New S Wales, Climate Change Res Ctr, Sydney, NSW 2052, Australia.
   ARC Ctr Excellence Climate Syst, Sydney, NSW 2052, Australia.
   Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China.
   UCL, Dept Geog, Mortimer St, London WC1E 6BT, England.
   Cardiff Univ, Sch Earth & Ocean Sci, Cardiff CF10 3XQ, S Glam, Wales.
   Univ Southampton, Natl Oceanog Ctr, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England.
   Nanyang Technol Univ, Earth Observ Singapore, 50 Nanyang Ave, Singapore 639798, Singapore.
   E China Normal Univ, Sch Geog Sci, Shanghai 200241, Peoples R China.
   Columbia Univ, Lamont Doherty Earth Observ, 61 Route 9W POB 1000, Palisades, NY 10964 USA.
C2 UNIV AUSTRALIAN NATL, AUSTRALIA
   UNIV NEW S WALES, AUSTRALIA
   ARC, AUSTRALIA
   CHINESE ACAD SCI, CHINA
   UNIV COLL LONDON, ENGLAND
   UNIV CARDIFF, ENGLAND
   UNIV SOUTHAMPTON, ENGLAND
   UNIV NANYANG TECHNOL, SINGAPORE
   UNIV CHINA NORMAL, CHINA
   UNIV COLUMBIA, USA
IF 13.941
TC 59
UR https://archimer.ifremer.fr/doc/00421/53257/83375.pdf
LA English
DT Article
CR IMAGES 1-MD101
   MD 123 / GEOSCIENCES 1
BO Marion Dufresne
AB Atmospheric CO2 concentrations declined markedly about 70,000 years ago, when the Earth's climate descended into the last glaciation. Much of the carbon removed from the atmosphere has been suspected to have entered the deep oceans, but evidence for increased carbon storage remains elusive. Here we use the B/Ca ratios of benthic foraminifera from several sites across the Atlantic Ocean to reconstruct changes in the carbonate ion concentration and hence the carbon inventory of the deep Atlantic across this transition. We find that deep Atlantic carbonate ion concentration declined by around 25 mu mol kg(-1) between similar to 80,000 and 65,000 years ago. This drop implies that the deep Atlantic carbon inventory increased by at least 50 Gt around the same time as the amount of atmospheric carbon dropped by about 60 Gt. From a comparison with proxy records of deep circulation and climate model simulations, we infer that the carbon sequestration coincided with a shoaling of the Atlantic meridional overturning circulation. We thus conclude that changes in the Atlantic Ocean circulation may have played an important role in reductions of atmospheric CO2 concentrations during the last glaciation, by increasing the carbon storage in the deep Atlantic. 
PY 2016
PD APR
SO Nature Geoscience
SN 1752-0894
PU Nature Publishing Group
VL 9
IS 4
UT 000373374100019
BP 319
EP 324
DI 10.1038/NGEO2657
ID 53257
ER

EF