FN Archimer Export Format
PT J
TI Radiocarbon evidence for alternating northern and southern sources of ventilation of the deep Atlantic carbon pool during the last deglaciation
BT 
AF SKINNER, Luke C.
   WAELBROECK, Claire
   SCRIVNER, Adam E.
   FALLON, Stewart J.
AS 1:1;2:2;3:1;4:3;
FF 1:;2:;3:;4:;
C1 Univ Cambridge, Dept Earth Sci, Godwin Lab Palaeoclimate Res, Cambridge CB2 3EQ, England.
   Univ Versailles St Quentin, Lab Sci Climat & Environm, Lab Ctr Natl Rech Sci, Inst Pierre Simon Lapl,Commissariat Energie Atom, F-91198 Gif Sur Yvette, France.
   Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
C2 UNIV CAMBRIDGE, UK
   IPSL, FRANCE
   UNIV AUSTRALIAN NATL, AUSTRALIA
IF 9.674
TC 83
UR https://archimer.ifremer.fr/doc/00290/40153/39327.pdf
   https://archimer.ifremer.fr/doc/00290/40153/39641.pdf
   https://archimer.ifremer.fr/doc/00290/40153/39642.txt
   https://archimer.ifremer.fr/doc/00290/40153/39643.txt
LA English
DT Article
CR IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   VT 90 / SOUC
BO Marion Dufresne
DE ;ocean circulation;carbon cycle;abrupt change
AB Recent theories for glacial-interglacial climate transitions call on millennial climate perturbations that purged the deep sea of sequestered carbon dioxide via a "bipolar ventilation seesaw." However, the viability of this hypothesis has been contested, and robust evidence in its support is lacking. Here we present a record of North Atlantic deep-water radiocarbon ventilation, which we compare with similar data from the Southern Ocean. A striking coherence in ventilation changes is found, with extremely high ventilation ages prevailing across the deep Atlantic during the last glacial period. The data also reveal two reversals in the ventilation gradient between the deep North Atlantic and Southern Ocean during Heinrich Stadial 1 and the Younger Dryas. These coincided with periods of sustained atmospheric CO2 rise and appear to have been driven by enhanced ocean-atmosphere exchange, primarily in the Southern Ocean. These results confirm the operation of a bipolar ventilation seesaw during deglaciation and underline the contribution of abrupt regional climate anomalies to longer-term global climate transitions.
PY 2014
PD APR
SO Proceedings Of The National Academy Of Sciences Of The United States Of America
SN 0027-8424
PU Natl Acad Sciences
VL 111
IS 15
UT 000334288600025
BP 5480
EP 5484
DI 10.1073/pnas.1400668111
ID 40153
ER

EF