Imperial College London
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ProfessorMartinSiegert

Faculty of Natural Sciences, The Grantham Institute for Climate Change

Visiting Professor
 
 
 
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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{Winter:2019:10.1029/2019GL084012,
author = {Winter, K and Woodward, J and Ross, N and Dunning, S and Hein, A and Westoby, M and Culberg, R and Marrero, S and Schroeder, D and Sugden, D and Siegert, M},
doi = {10.1029/2019GL084012},
journal = {Geophysical Research Letters},
pages = {10454--10462},
title = {Radar-detected englacial debris in the West Antarctic Ice Sheet},
url = {http://dx.doi.org/10.1029/2019GL084012},
volume = {46},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Structural glacigeological processes can entrain basal sediment into ice, leading to its transportation and deposition downstream. Sediments potentially rich in essential nutrients, like silica and iron, can thus be transferred from continental sources to the ocean, where deposition could enhance marine primary productivity. However, a lack of data has limited our knowledge of sediment entrainment, transfer and distribution in Antarctica, until now. We use icepenetrating radar to examine englacial sediments in the Weddell Sea sector of the West Antarctic Ice Sheet. Radargrams reveal englacial reflectors on the lee side of nunataks and subglacial highlands, where Mie scattering analysis of the reflectors suggests particle sizes consistent with surface moraine sediments. We hypothesize that these sediments aare entrained at the thermal boundary between cold and warmbased ice. Conservative estimates of >130 x109 kg of englacial sediment in Horseshoe Valley alone suggest that the ice sheet has significant entrainment potential unappreciated previously.
AU  - Winter,K
AU  - Woodward,J
AU  - Ross,N
AU  - Dunning,S
AU  - Hein,A
AU  - Westoby,M
AU  - Culberg,R
AU  - Marrero,S
AU  - Schroeder,D
AU  - Sugden,D
AU  - Siegert,M
DO  - 10.1029/2019GL084012
EP  - 10462
PY  - 2019///
SN  - 0094-8276
SP  - 10454
TI  - Radar-detected englacial debris in the West Antarctic Ice Sheet
T2  - Geophysical Research Letters
UR  - http://dx.doi.org/10.1029/2019GL084012
UR  - https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019GL084012
UR  - http://hdl.handle.net/10044/1/72891
VL  - 46
ER  -
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