Imperial College London

ProfessorMartinSiegert

Faculty of Natural SciencesThe Grantham Institute for Climate Change

Co-Director,Grantham Institute forClimate Change&Environment
 
 
 
//

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:2017:10.1144/SP461.8,
author = {Siegert, MJ and Kulessa, B and Bougamont, M and Christoffersen, P and Key, K and Andersen, K and Booth, AD and Smith, AM},
doi = {10.1144/SP461.8},
journal = {Special Publication - Geological Society of London},
title = {Antarctic subglacial groundwater: a concept paper on its measurement and potential influence on ice flow},
url = {http://dx.doi.org/10.1144/SP461.8},
volume = {Special Publications},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Is groundwater abundant in Antarctica and does it modulate ice flow? Answering this question matters because ice streams flow by gliding over a wet substrate of till. Water fed to ice-stream beds thus influences ice-sheet dynamics and, potentially, sea-level rise. It is recognised that both till and the sedimentary basins from which it originates are porous and could host a reservoir of mobile groundwater that interacts with the subglacial interfacial system. According to recent numerical modelling up to half of all water available for basal lubrication, and time lags between hydrological forcing and ice-sheet response as long as millennia, may have been overlooked in models of ice flow. Here, we review evidence in support of Antarctic groundwater and propose how it can be measured to ascertain the extent to which it modulates ice flow. We present new seismoelectric soundings of subglacial till, and magnetotelluric and transient electromagnetic forward models of subglacial groundwater reservoirs. We demonstrate that multi-facetted and integrated geophysical datasets can detect, delineate and quantify the groundwater contents of subglacial sedimentary basins and, potentially, monitor groundwater exchange rates between subglacial till layers. The paper thus describes a new area of glaciological investigation and how it should progress in future.
AU - Siegert,MJ
AU - Kulessa,B
AU - Bougamont,M
AU - Christoffersen,P
AU - Key,K
AU - Andersen,K
AU - Booth,AD
AU - Smith,AM
DO - 10.1144/SP461.8
PY - 2017///
SN - 0305-8719
TI - Antarctic subglacial groundwater: a concept paper on its measurement and potential influence on ice flow
T2 - Special Publication - Geological Society of London
UR - http://dx.doi.org/10.1144/SP461.8
UR - http://hdl.handle.net/10044/1/44703
VL - Special Publications
ER -