Imperial College London
Portrait Picture

ProfessorMartinSiegert

Faculty of Natural Sciences, The Grantham Institute for Climate Change

Visiting Professor
 
 
 
//

Contact

 

+44 (0)20 7594 9666m.siegert Website

 
 
//

Assistant

 

Ms Gosia Gayer +44 (0)20 7594 9666

 
//

Location

 

Grantham Directors OfficeSherfield BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Siegert:2019:10.1029/2019RG000651,
author = {Siegert, M and Kingslake, J and Ross, N and Whitehouse, P and Woodward, J and Jamieson, S and Bentley, M and Winter, K and Wearing, M and Hein, A and Jeofry, H and Sugden, D},
doi = {10.1029/2019RG000651},
journal = {Reviews of Geophysics},
pages = {1197--1223},
title = {Major icesheet change in the Weddell Sector of West Antarctica over the last 5000 years},
url = {http://dx.doi.org/10.1029/2019RG000651},
volume = {57},
year = {2019}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Until recently, little was known about the Weddell Sea sector of the West Antarctic Ice Sheet. In the last 10 years, a variety of expeditions and numerical modelling experiments have improved knowledge of its glaciology, glacial geology, and tectonic setting. Two of the sector's largest ice streams rest on a steep reversesloping bed yet, despite being vulnerable to change, satellite observations show contemporary stability. There is clear evidence for major icesheet reconfiguration in the last few thousand years, however. Knowing precisely how the ice sheet has changed in the past, and when, would allow us to better understand whether it is now at risk. Two competing hypotheses have been established for this glacial history. In one, the ice sheet retreated and thinned progressively from its Last Glacial Maximum position. Retreat stopped at, or very near, the present position in the Late Holocene. Alternatively, in the Late Holocene the ice sheet retreated significantly upstream of the present grounding line, and then advanced to the present location due to glacial isostatic adjustment, and iceshelf and ice rise buttressing. Both hypotheses point to data and theory in their support, yet neither has been unequivocally tested or falsified. Here, we review geophysical evidence to determine how each hypothesis has been formed, where there are inconsistencies in the respective glacial histories, how they may be tested or reconciled, and what new evidence is required to reach a common model for the Late Holocene ice sheet history of the Weddell Sea sector of West Antarctica.
AU  - Siegert,M
AU  - Kingslake,J
AU  - Ross,N
AU  - Whitehouse,P
AU  - Woodward,J
AU  - Jamieson,S
AU  - Bentley,M
AU  - Winter,K
AU  - Wearing,M
AU  - Hein,A
AU  - Jeofry,H
AU  - Sugden,D
DO  - 10.1029/2019RG000651
EP  - 1223
PY  - 2019///
SN  - 8755-1209
SP  - 1197
TI  - Major icesheet change in the Weddell Sector of West Antarctica over the last 5000 years
T2  - Reviews of Geophysics
UR  - http://dx.doi.org/10.1029/2019RG000651
UR  - https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019RG000651
UR  - http://hdl.handle.net/10044/1/74579
VL  - 57
ER  -
Download