Menu

Earth Institute Research Projects

Holocene changes in Antarctic Ice Sheet extent

Lead PI: Dr Jonathan Kingslake

Unit Affiliation: Marine Geology & Geophysics, Lamont-Doherty Earth Observatory (LDEO)

Unknown start date - Ongoing
Active
Project Type: Research

DESCRIPTION: Knowledge of past changaes in the extent of ice sheets can help to improve the way numerical models represent the physical processes that are known to control ice-sheet change and uncover new important processes. Our work in this area includes ice-penetrating radar and seismic surveys, radiocarbon recovered in cores, and a range of modelling approaches. In 2018 a collaboration between 10 scientists from 5 institutions across 3 countries, lead to a paper presenting strong evidence that the West Antarctic Ice Sheet was smaller than it is today during the Holocene, in both the Weddell Sea and Ross Sea sectors. We hypothesized that this was due to the delayed response of the lithosphere to unloading following the Last Glacial Maximum. The evidence came from ice-penetrating radar, and radiocarbon fond in subglacial sediments and we examined the implications of and controls on the readvance using a continent-wide ice-sheet model. This work is reported in Nature (Kingslake, Scherer, Albrecht et al., 2018).

OUTCOMES: Our paper reporting evidence for readvance of the West Antarctic Ice Sheet during the Holocene (Kingslake, Scherer and Albrecht et al., 2018, Nature) was cited in the Intergovernmental Panel on Climate Change's Special Report on the Ocean and Cryosphere in a Changing Climate.

RESEARCH TEAM:

Martin Wearing

PUBLICATIONS:

Siegert, M, J., J. Kingslake, N. Ross, P. L. Whitehouse, J. Woodward, S. S. R. Jamieson, M. J. Bentley, K. Winter, M. Wearing, A. S. Hein, H. Jeofry, D. E. Sugden. Late Holocene Glacial History of the Weddell Sea Sector of the West Antarctic Ice Sheet, Reviews of Geophysics. in press

Wearing, M.G. and Kingslake, J., Holocene Formation of Henry Ice Rise, West Antarctica, Inferred from Ice‐Penetrating Radar. Journal of Geophysical Research: Earth Surface. 124, 8, 2224-2240, doi.org/10.1029/2018JF004988

Kingslake, J., C. Martín, R.J. Arthern, H.F.J. Corr & E.C. King (2016) Ice‐flow reorganization in West Antarctica 2.5 kyr ago dated using radar‐derived englacial flow velocities. Geophysical Research Letters, 43(17), 9103–9112.

Kingslake, J., R.P. Scherer, T. Albrecht, J. Coenen, R.D. Powell, R. Reese, N.D. Stansell, S. Tulaczyk, M.G. Wearing & P.L. Whitehouse (2018) Extensive retreat and re-advance of the West Antarctic Ice Sheet during the Holocene. Nature, 558(7710), 430–434.

KEYWORDS

ice rises sea level change ice-sheet modelling geophysics glacial isostatic adjustment ice sheet dynamics