FN Archimer Export Format
PT J
TI A Synthesis of Deglacial Deep-Sea Radiocarbon Records and Their (In)Consistency With Modern Ocean Ventilation
BT 
AF ZHAO, Ning
   MARCHAL, Olivier
   KEIGWIN, Lloyd
   AMRHEIN, Daniel
   GEBBIE, Geoffrey
AS 1:1,2;2:3;3:3;4:4,5;5:6;
FF 1:;2:;3:;4:;5:;
C1 Massachusetts Inst Technol Woods Hole Oceanog Ins, Woods Hole, MA 02543 USA.
   Max Planck Inst Chem, Climate Geochem Dept, Mainz, Germany.
   Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA.
   Univ Washington, Sch Oceanog, Seattle, WA 98195 USA.
   Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA.
   Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA.
C2 MIT, USA
   INST MAX PLANCK, GERMANY
   WHOI, USA
   UNIV WASHINGTON, USA
   UNIV WASHINGTON, USA
   WHOI, USA
IF 2.888
TC 36
UR https://archimer.ifremer.fr/doc/00496/60790/64955.pdf
   https://archimer.ifremer.fr/doc/00496/60790/64956.pdf
LA English
DT Article
CR IMAGES 3-IPHIS-MD106
   IMAGES 4-MD111
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 122 / WEPAMA
   MD 147 / MARCO-POLO1-IMAGESXII
   MD 168 / AMOCINT (IMAGES XVII)
   MD 173 / RETRO 2 (IMAGES 18)
   MD159 / PACHIDERME
   VT 90 / SOUC
BO Marion Dufresne
DE ;last deglaciation;ocean ventilation;data synthesis;radiocarbon;inverse method
AB We present a synthesis of 1,361 deep-sea radiocarbon data spanning the past 40kyr and computed (for C-14-dated records) from the same calibration to atmospheric C-14. The most notable feature in our compilation is a long-term Delta C-14 decline in deep oceanic basins over the past 25kyr. The Delta C-14 decline mirrors the drop in reconstructed atmospheric Delta C-14, suggesting that it may reflect a decrease in global C-14 inventory rather than a redistribution of C-14 among different reservoirs. Motivated by this observation, we explore the extent to which the deep water C-14 data jointly require changes in basin-scale ventilation during the last deglaciation, based on the fit of a 16-box model of modern ocean ventilation to the deep water Delta C-14 records. We find that the fit residuals can largely be explained by data uncertainties and that the surface water Delta C-14 values producing the fit are within the bounds provided by contemporaneous values of atmospheric and deep water Delta C-14. On the other hand, some of the surface Delta C-14 values in the northern North Atlantic and the Southern Ocean deviate from the values expected from atmospheric (CO2)-C-14 and CO2 concentrations during the Heinrich Stadial 1 and the BOlling-AllerOd. The possibility that deep water 16-box records reflect some combination of changes in deep circulation and surface water reservoir ages cannot be ruled out and will need to be investigated with a more complete model. 
PY 2018
PD FEB
SO Paleoceanography And Paleoclimatology
SN 2572-4517
PU Amer Geophysical Union
VL 33
IS 2
UT 000428070000001
BP 128
EP 151
DI 10.1002/2017PA003174
ID 60790
ER

EF