Imperial College London

ProfessorMartinSiegert

Faculty of Natural SciencesThe Grantham Institute for Climate Change

Co-Director,Grantham Institute forClimate Change&Environment
 
 
 
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Contact

 

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

 
 
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Assistant

 

Ms Gosia Gayer +44 (0)20 7594 9666

 
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Location

 

Grantham Directors OfficeSherfield BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jeofry:2018:10.5194/essd-10-711-2018,
author = {Jeofry, H and Ross, N and Corr, HFJ and Li, J and Morlighem, M and Gogineni, P and Siegert, MJ},
doi = {10.5194/essd-10-711-2018},
journal = {Earth System Science Data},
pages = {711--725},
title = {A new bed elevation model for the Weddell Sea sector of the West Antarctic Ice Sheet},
url = {http://dx.doi.org/10.5194/essd-10-711-2018},
volume = {10},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We present a new digital elevation model (DEM) of the bed, with a 1km gridding, of the Weddell Sea (WS) sector of the West Antarctic Ice Sheet (WAIS). The DEM has a total area of ∼ 125000km2 covering the Institute, Möller and Foundation ice streams, as well as the Bungenstock ice rise. In comparison with the Bedmap2 product, our DEM includes new aerogeophysical datasets acquired by the Center for Remote Sensing of Ice Sheets (CReSIS) through the NASA Operation IceBridge (OIB) program in 2012, 2014 and 2016. We also improve bed elevation information from the single largest existing dataset in the region, collected by the British Antarctic Survey (BAS) Polarimetric radar Airborne Science Instrument (PASIN) in 2010–2011, from the relatively crude measurements determined in the field for quality control purposes used in Bedmap2. While the gross form of the new DEM is similar to Bedmap2, there are some notable differences. For example, the position and size of a deep subglacial trough (∼ 2km below sea level) between the ice-sheet interior and the grounding line of the Foundation Ice Stream have been redefined. From the revised DEM, we are able to better derive the expected routing of basal water and, by comparison with that calculated using Bedmap2, we are able to assess regions where hydraulic flow is sensitive to change. Given the potential vulnerability of this sector to ocean-induced melting at the grounding line, especially in light of the improved definition of the Foundation Ice Stream trough, our revised DEM will be of value to ice-sheet modelling in efforts to quantify future glaciological changes in the region and, from this, the potential impact on global sea level. The new 1km bed elevation product of the WS sector can be found at https://doi.org/10.5281/zenodo.1035488.
AU - Jeofry,H
AU - Ross,N
AU - Corr,HFJ
AU - Li,J
AU - Morlighem,M
AU - Gogineni,P
AU - Siegert,MJ
DO - 10.5194/essd-10-711-2018
EP - 725
PY - 2018///
SN - 1866-3508
SP - 711
TI - A new bed elevation model for the Weddell Sea sector of the West Antarctic Ice Sheet
T2 - Earth System Science Data
UR - http://dx.doi.org/10.5194/essd-10-711-2018
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000429436300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/63582
VL - 10
ER -