<aside> 📃 Willcocks, S., D. Hasterok, and S. Jennings (2021), Thermal refraction: implications for subglacial heat flux, Journal of Glaciology, 67(265), 875–884.

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Date: September 24, 2021

Topic: Group meeting journal article discussion

<aside> ❓ **TERMS & ACRONYMS:

Free surface:
BGHF: Basal geothermal heat flux**

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In this scenario, the bedrock is LESS conductive than the ice. So it is like Figure 5a. It's actually the less-likely scenario on Earth (usually rock is MORE conductive than ice).

Paper breakdown

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Knowledge Gap
Study goals
Study tools
New questions or hypotheses made possible by this research

Key Findings

<aside> 📌 SUMMARY: This work found that the original topographic model (van der Veen et al., 2007) is not accurate. Thermal refraction is important in determining basal temperatures under ice sheets. Thermal refraction may be responsible for the formation of SUBGLACIAL LAKES!

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Figures

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Figure 1 [General graph of temperature versus depth]
Figure 2 [Model domain with isotherms and heat flux]
Figure 3 [Thermal conductivities of glacier ice and common subglacial rocks]
Figure 4 [Geometries of modeled scenarios]
Figure 5 [Modeled temperature changes for a subglacial valley]