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	commit dd64f92875f51862c8d7a03c318f0cdd0937b0c7
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	Author: Anders Damsgaard <[email protected]>
	Date: Wed, 9 Dec 2020 11:09:29 +0100

	add plaintext version of commsenv post for gopher

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	+The majority of glaciers and ice sheets flow on a bed of loose and
	+thawed sediments. These sediments are weakened by pressurized glacial
	+meltwater, and their lubrication accelerates the ice movement. In
	+formerly-glaciated areas of the world, for example Northern Europe,
	+North America, and in the forelands of the Alps, the landscape is
	+reshaped and remolded by past ice moving the sediments along with
	+its flow. The sediment movement is also observed under current
	+glaciers, both the fast-moving ice streams of the Greenland and
	+Antarctic ice sheets, as well as smaller glaciers in the mountainous
	+areas of Alaska, northern Sweden, and elsewhere. The movement of
	+sediment could be important for the past progression of glaciations,
	+and how resilient marine-terminating ice streams are against sea-level
	+rise.
	+
	+Today, the Nature-group journal Communications Earth & Environment
	+published my paper on sediment beneath ice. Together with co-authors
	+Liran Goren, University of the Negev (Israel), and Jenny Suckale,
	+Stanford University (California, USA), we present a new computer
	+model that simulates the coupled mechanical behavior of ice, sediment,
	+and meltwater. We calibrate the model against real materials, and
	+provide a way forward for including sediment transport in ice-flow
	+models. We also show that water-pressure variations with the right
	+frequency can create create very weak sections inside the bed, and
	+this greatly enhances sediment transport. I designed the freely-available
	+program cngf-pf for the simulations.
	+
	+
	+## Abstract
	+
	+ Water pressure fluctuations control variability in sediment
	+ flux and slip dynamics beneath glaciers and ice streams
	+
	+ Rapid ice loss is facilitated by sliding over beds consisting
	+ of reworked sediments and erosional products, commonly referred
	+ to as till. The dynamic interplay between ice and till reshapes
	+ the bed, creating landforms preserved from past glaciations.
	+ Leveraging the imprint left by past glaciations as constraints
	+ for projecting future deglaciation is hindered by our incomplete
	+ understanding of evolving basal slip. Here, we develop a continuum
	+ model of water-saturated, cohesive till to quantify the interplay
	+ between meltwater percolation and till mobilization that governs
	+ changes in the depth of basal slip under fast-moving ice. Our
	+ model explains the puzzling variability of observed slip depths
	+ by relating localized till deformation to perturbations in
	+ pore-water pressure. It demonstrates that variable slip depth
	+ is an inherent property of the ice-meltwater-till system, which
	+ could help understand why some paleo-landforms like grounding-zone
	+ wedges appear to have formed quickly relative to current
	+ till-transport rates.
	+
	+
	+## Metrics
	+
	+It is a substantial task to prepare a scientific publication. The
	+commit counts below mark the number of revisions done during
	+preparation of this paper:
	+
	+ - Main article text: 239 commits
	+ - Supplementary information text: 35 commits
	+ - Experiments and figures: 282 commits
	+ - Simulation software: 354 commits
	+
	+
	+## Links and references:
	+
	+ - Publication on journal webpage:
	+ - Article PDF (?? MB):
	+ - Supplementary information PDF (?? MB):
	+ - Source code for producing figures: git://src.adamsgaard.dk/cngf-pf-exp1
	+ - Simulation software: git://src.adamsgaard.dk/cngf-pf