FN Archimer Export Format
PT J
TI Assessing the spatial origin of Meltwater Pulse 1A using oxygen‐isotope fingerprinting
BT 
AF Yeung, N.K.H.
   Menviel, L.
   Meissner, K.J.
   Sikes, E.
AS 1:1;2:1;3:1;4:2;
FF 1:;2:;3:;4:;
C1 Climate Change Research Centre, University of New South Wales, Australia, and ARC Centre of Excellence for Climate Extremes, australia
   Institute of Marine and Coastal Sciences ,State University of New Jersey, Rutgers New Brunswick NJ ,USA
C2 UNIV NEW SOUTH WALES, AUSTRALIA
   UNIV RUTGERS, USA
IF 2.888
TC 5
UR https://archimer.ifremer.fr/doc/00593/70548/68718.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES 3-IPHIS-MD106
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 123 / GEOSCIENCES 1
   VT 90 / SOUC
BO Marion Dufresne
AB One of the major phases of sea level rise during the last deglaciation (~19‐11 thousand years before present (ka BP)) is Meltwater Pulse‐1A (MWP‐1A, ~14.5 ka BP), when sea levels rose by 8.6 to 18 meters in less than 400 years. Whether the meltwater originated from the partial disintegration of northern hemispheric (NH) ice sheets, from Antarctica, or both, remains controversial. Here we perform a series of idealized transient simulations of the last deglaciation, focusing on MWP‐1A, with a three‐dimensional oxygen‐isotope enabled Earth System Climate Model. Three meltwater scenarios are considered during MWP‐1A: a sole northern hemispheric source discharging into the North Atlantic, a sole Antarctic source and a combined NH‐Antarctic source. A comparison of simulated changes in the oxygen‐isotope composition (δ18O) of seawater and calcite with published marine sediment records points to a significant contribution from Antarctica. The best model‐data fit is obtained with a contribution from both hemispheres. While the simulated changes over the 350 years of MWP‐1A are overestimated in our simulations, the millennial‐scale changes (~14.6‐13 ka BP) are underestimated, potentially alluding to a longer and sustained meltwater input over the whole period. Meltwater was not applied in the Arctic, the Gulf of Mexico or the North Pacific in our simulations and therefore scenarios with meltwater originating from these regions cannot be excluded. 
PY 2019
PD DEC
SO Paleoceanography And Paleoclimatology
SN 2572-4517
PU American Geophysical Union (AGU)
VL 34
IS 12
UT 000508572200010
BP 2031
EP 2046
DI 10.1029/2019PA003599
ID 70548
ER

EF