2017
DOI: 10.1002/2016gc006755
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Geothermal heat flux in the Amundsen Sea sector of West Antarctica: New insights from temperature measurements, depth to the bottom of the magnetic source estimation, and thermal modeling

Abstract: Focused research on the Pine Island and Thwaites glaciers, which drain the West Antarctic Ice Shelf (WAIS) into the Amundsen Sea Embayment (ASE), revealed strong signs of instability in recent decades that result from variety of reasons, such as inflow of warmer ocean currents and reverse bedrock topography, and has been established as the Marine Ice Sheet Instability hypothesis. Geothermal heat flux (GHF) is a poorly constrained parameter in Antarctica and suspected to affect basal conditions of ice sheets, i… Show more

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Cited by 20 publications
(33 citation statements)
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References 60 publications
(118 reference statements)
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“…Log-logistic probability density functions that statistically describe GHF distributions for different data sources filtered for West Antarctica. The results of this study correlate well with estimates by Fox Maule et al (2005) and Shapiro and Ritzwoller (2004), and the lower end of GHF ranges of the thermal models presented by Dziadek et al (2017). (6)).…”
Section: Discussionsupporting
confidence: 90%
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“…Log-logistic probability density functions that statistically describe GHF distributions for different data sources filtered for West Antarctica. The results of this study correlate well with estimates by Fox Maule et al (2005) and Shapiro and Ritzwoller (2004), and the lower end of GHF ranges of the thermal models presented by Dziadek et al (2017). (6)).…”
Section: Discussionsupporting
confidence: 90%
“…Without further constraints and validations these assumptions remain our best guess, especially in sparsely sampled regions like Antarctica, but introduce uncertainties of several kilometers in Curie Depths and hence GHF estimates. The distribution of inferred GHF values presented in Dziadek et al (2017) at the lower range of distributions shown in Fig. 5 is attributed to the biases implied by the sampling strategy imposed by the temperature probe length and the variability in bottom water temperatures.…”
Section: Discussionmentioning
confidence: 96%
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“…While a small number of drill holes exist in Antarctica, they are extremely sparse in their distribution (Martos et al, ) and all measure thermal parameters only within ice or subglacial sediment; none yet have intersected the bedrock beneath (Goodge, ). Some measurements exist from offshore localities that sample sediment derived from the continental margin (Decker & Bucher, ; Dziadek et al, ; Morin et al, ). These measurements are not representative of onshore continental bedrock, as they are affected by advective flow at the surface and influenced by varied levels of sedimentation compared to heat flow onshore.…”
Section: Geological Backgroundmentioning
confidence: 99%