TY - JOUR
T1 - Constraining the contribution of the Antarctic Ice Sheet to Last Interglacial sea-level
AU - Barnett, Robert L.
AU - Austermann, Jacqueline
AU - Dyer, Blake
AU - Telfer, Matt W.
AU - Barlow, Natasha L.M.
AU - Boulton, Sarah J.
AU - Carr, Andrew S.
AU - Creel, Roger C.
PY - 2023/7/5
Y1 - 2023/7/5
N2 - Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today,
making this time period an important testing ground to better understand how ice sheets respond to warming.
However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this
period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from
Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that
the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a
maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68% probability) before declining. Our
results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by
later Greenland Ice Sheet mass loss.
AB - Polar temperatures during the Last Interglacial [LIG; ~129 to 116 thousand years (ka)] were warmer than today,
making this time period an important testing ground to better understand how ice sheets respond to warming.
However, it remains debated how much and when the Antarctic and Greenland ice sheets changed during this
period. Here, we present a combination of new and existing absolutely dated LIG sea-level observations from
Britain, France, and Denmark. Because of glacial isostatic adjustment (GIA), the LIG Greenland ice melt contribution to sea-level change in this region is small, which allows us to constrain Antarctic ice change. We find that
the Antarctic contribution to LIG global mean sea level peaked early in the interglacial (before 126 ka), with a
maximum contribution of 5.7 m (50th percentile, 3.6 to 8.7 m central 68% probability) before declining. Our
results support an asynchronous melt history over the LIG, with an early Antarctic contribution followed by
later Greenland Ice Sheet mass loss.
UR - https://pearl.plymouth.ac.uk/context/gees-research/article/1531/viewcontent/sciadv.adf0198.pdf
U2 - 10.1126/sciadv.adf0198
DO - 10.1126/sciadv.adf0198
M3 - Article
SN - 2375-2548
VL - 9
JO - Science advances
JF - Science advances
IS - 27
ER -