Comment on “Exceptionally high heat flux needed to sustain the Northeast Greenland Ice Stream” by Smith-Johnsen et al. (2020)
2021
Abstract. Smith-Johnsen et al. (The Cryosphere, 14, 841–854, https://doi.org/10.5194/tc-14-841-2020 , 2020)
model the effect of a potential hotspot on the Northeast Greenland Ice
Stream (NEGIS). They argue that a heat flux of at least 970 mW m −2 is
required to have initiated or to control NEGIS. Such an exceptionally high heat
flux would be unique in the world and is incompatible with known geological
processes that can raise the heat flux. Fast flow at NEGIS must thus be
possible without the extraordinary melt rates invoked in Smith-Johnsen et
al. (2020).
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