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{Jordan:2018:10.1038/s41598-018-35182-0,
author = {Jordan, T and Martin, C and Ferraccioli, F and Matsuoka, K and Corr, H and Forsberg, R and Olesen, A and Siegert, M},
doi = {10.1038/s41598-018-35182-0},
journal = {Scientific Reports},
title = {Anomalously high geothermal flux near the South Pole},
url = {http://dx.doi.org/10.1038/s41598-018-35182-0},
volume = {8},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Melting at the base of the Antarctic Ice Sheet influences ice dynamics and our ability to recover ancient climatic records from deep ice cores. Basal melt rates are affected by geothermal flux, one of the least constrained properties of the Antarctic continent. Estimates of Antarctic geothermal flux are typically regional in nature, derived from geological, magnetic or seismic data, or from sparse point measurements at ice core sites. We analyse ice-penetrating radar data upstream of South Pole revealing a ~100 km long and 50 km wide area where internal ice sheet layers converge with the bed. Ice sheet modelling shows that this englacial layer configuration requires basal melting of up to 6 ± 1 mm a−1 and a geothermal flux of 120 ± 20 mW m−2, more than double the values expected for this cratonic sector of East Antarctica. We suggest high heat producing Precambrian basement rocks and hydrothermal circulation along a major fault system cause this anomaly. We conclude that local geothermal flux anomalies could be more widespread in East Antarctica. Assessing their influence on subglacial hydrology and ice sheet dynamics requires new detailed geophysical observations, especially in candidate areas for deep ice core drilling and at the onset of major ice streams.
AU  - Jordan,T
AU  - Martin,C
AU  - Ferraccioli,F
AU  - Matsuoka,K
AU  - Corr,H
AU  - Forsberg,R
AU  - Olesen,A
AU  - Siegert,M
DO  - 10.1038/s41598-018-35182-0
PY  - 2018///
SN  - 2045-2322
TI  - Anomalously high geothermal flux near the South Pole
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-018-35182-0
UR  - http://hdl.handle.net/10044/1/66028
VL  - 8
ER  -
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