FN Archimer Export Format
PT J
TI Deglacial ventilation changes in the deep Southwest Pacific
BT 
AF Dai, Yuhao
   Yu, Jimin
   Rafter, Patrick A.
AS 1:1;2:1;3:2;
FF 1:;2:;3:;
C1 Research School of Earth Sciences The Australian National University Canberra ACT ,Australia
   Department of Earth System Science University of California Irvine CA, USA
C2 UNIV AUSTRALIAN NATL, AUSTRALIA
   UNIV CALIF IRVINE, USA
IF 3.992
TC 7
UR https://archimer.ifremer.fr/doc/00676/78777/80955.pdf
   https://archimer.ifremer.fr/doc/00676/78777/80956.pdf
LA English
DT Article
CR IMAGES 3-IPHIS-MD106
   VT 90 / SOUC
BO Marion Dufresne
DE ;carbon cycle;deglaciation;radiocarbon;Southern Ocean;ventilation
AB Processes underlying changes in the oceanic carbon storage during the Last Glacial Maximum and the subsequent deglaciation are not fully understood. Here, we present a new high‐resolution radiocarbon reconstruction (expressed as δ14R) at the depth of the modern Lower Circumpolar Deep Water from the Pacific Sector of the Southern Ocean. Our record shows δ14R increases during Heinrich Stadial 1 and the Younger Dryas that agree with the deep‐to‐shallow transfer of old carbon in the Southern Ocean during these two periods. Our record also shows, for the first time, a clear ∼80‰ decline in δ14R during the Antarctic Cold Reversal (ACR), indicating the development of poorly ventilated conditions in the deep Southwest Pacific. These conditions are consistent with the increased Southern Ocean sea‐ice and associated stratification between Upper and Lower Circumpolar Deep Waters. This enhanced stratification in the deep South Pacific possibly facilitated greater carbon storage in the ocean interior during the ACR, effectively limiting oceanic CO2 release and contributing to the atmospheric CO2 plateau as observed in ice cores at that time. 
PY 2021
PD FEB
SO Paleoceanography And Paleoclimatology
SN 2572-4517
PU American Geophysical Union (AGU)
VL 36
IS 2
UT 000624116800008
DI 10.1029/2020PA004172
ID 78777
ER

EF