Articles | Volume 11, issue 5
The Cryosphere, 11, 2231–2246, 2017
https://doi.org/10.5194/tc-11-2231-2017

Special issue: Oldest Ice: finding and interpreting climate proxies in ice...

The Cryosphere, 11, 2231–2246, 2017
https://doi.org/10.5194/tc-11-2231-2017
Research article
20 Sep 2017
Research article | 20 Sep 2017

Geothermal flux and basal melt rate in the Dome C region inferred from radar reflectivity and heat modelling

Olivier Passalacqua et al.

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Cited articles

Bamber, J., Gomez-Dans, J., and Griggs, J.: Antarctic 1 km digital elevation model (DEM) from combined ERS-1 radar and ICESat laser satellite altimetry, National Snow and Ice Data Center, Boulder, Colorado, USA, 2009.
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Brook, E. J., Wolff, E., Dahl-Jensen, D., Fischer, H., and Steig, E. J.: The future of ice coring: International partnerships in Ice Core Sciences (IPICS), PAGES news, 14, 6–10, http://www.pages-igbp.org/download/docs/newsletter/2006-1/program_news/Brook_etal_2006-1(6-10).pdf (last access: 13 September 2017), 2006.
Carson, C. J., McLaren, S., Roberts, J. L., Boger, S. D., and Blankenship, D. D.: Hot rocks in a cold place: high sub-glacial heat flow in East Antarctica, J. Geol. Soc., 171, 9–12, https://doi.org/10.1144/jgs2013-030, 2014.
Carter, S. P., Blankenship, D. D., Young, D. A., and Holt, J. W.: Using radar-sounding data to identify the distribution and sources of subglacial water: application to Dome C, East Antarctica, J. Glaciol., 55, 1025–1040, 2009.
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Short summary
As the Dome C region is a key area for oldest-ice research, we need to better constrain the geothermal flux (GF) so that past basal melt rates are well constrained. Our inverse heat model significantly reduces the confidence intervals of the GF regional field around Dome C, which ranges from 48 to 60 mW m−2. Radar echoes need to be interpreted knowing the time lag of the climate signal to reach the bed. Several old-ice targets are confirmed and a new one is suggested, in which the GF is very low.