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{Jeofry:2017:10.1144/SP461.11,
author = {Jeofry, H and Ross, N and Corr, H and Li, J and Gogineni, P and Siegert, MJ},
doi = {10.1144/SP461.11},
journal = {Special Publication - Geological Society of London},
title = {A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica},
url = {http://dx.doi.org/10.1144/SP461.11},
volume = {Special Publications 461},
year = {2017}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The Institute Ice Stream (IIS) in West Antarctica may be increasingly vulnerable to melting at the grounding line through modifications in ocean circulation. Understanding such change requires knowledge of grounding-line boundary conditions, including the topography on which it rests. Here, we discuss evidence from new radio-echo sounding (RES) data on the subglacial topography adjacent to the grounding line of the IIS. In doing so, we reveal a previously unknown subglacial embayment immediately inland of the IIS grounding zone which is not represented in the Bedmap2 compilation. We discuss whether there is an open-water connection between the embayment and the ice-shelf cavity. The exact location of the grounding line over the embayment has been the subject of considerable uncertainty, with several positions being proposed recently. From our compilation of data, we are able to explain which of these grounding lines is most likely and, in doing so, highlight the need for accurate bed topography in conjunction with satellite observations to fully comprehend ice-sheet processes in this region and other vulnerable locations at the grounded margin of Antarctica.
AU  - Jeofry,H
AU  - Ross,N
AU  - Corr,H
AU  - Li,J
AU  - Gogineni,P
AU  - Siegert,MJ
DO  - 10.1144/SP461.11
PY  - 2017///
SN  - 0305-8719
TI  - A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica
T2  - Special Publication - Geological Society of London
UR  - http://dx.doi.org/10.1144/SP461.11
UR  - http://hdl.handle.net/10044/1/48113
VL  - Special Publications 461
ER  -
Download