tcommsenv: remove old post - adamsgaard.dk - my academic webpage | |
git clone git://src.adamsgaard.dk/adamsgaard.dk | |
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Files | |
Refs | |
README | |
LICENSE | |
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commit 2faacb3f20d411154809cdbe5fa201c569e1155c | |
parent db3807a0b7a4617410c13e4b34a262dcb02a879a | |
Author: Anders Damsgaard <[email protected]> | |
Date: Thu, 17 Dec 2020 16:45:00 +0100 | |
commsenv: remove old post | |
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D pages/007-commsenv.txt | 70 -----------------------------… | |
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diff --git a/pages/007-commsenv.cfg b/pages/007-commsenv.cfg | |
t@@ -1,7 +0,0 @@ | |
-filename=commsenv.html | |
-title=New paper out on the coupled dynamics of ice, meltwater, and till | |
-description=A brief summary of my new paper published in Communications Earth … | |
-id=commsenv | |
-tags=science, glaciology, ice sheet | |
-created=2020-12-09 | |
-updated=2020-12-09 | |
diff --git a/pages/007-commsenv.html b/pages/007-commsenv.html | |
t@@ -1,72 +0,0 @@ | |
-<p>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.</p> | |
- | |
-<p>Today, the Nature-group journal <a | |
-href="https://www.nature.com/commsenv/">Communications Earth & | |
-Environment</a> 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 <a | |
-href="https://src.adamsgaard.dk/cngf-pf">cngf-pf</a> for the | |
-simulations.</p> | |
- | |
-<h2>Abstract</h2> | |
-<blockquote> | |
-<b>Water pressure fluctuations control variability in sediment flux | |
-and slip dynamics beneath glaciers and ice streams</b> | |
-<br><br> | |
-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. | |
-</blockquote> | |
- | |
-<h2>Metrics</h2> | |
-<p>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:</p> | |
- | |
-<ul> | |
- <li>Main article text: 239 commits</li> | |
- <li>Supplementary information text: 35 commits</li> | |
- <li>Experiments and figures: 282 commits</li> | |
- <li>Simulation software: 354 commits</li> | |
-</ul> | |
- | |
-<h2>Links and references:</h2> | |
-<ul> | |
- <li><a href="">Publication on journal webpage</a></li> | |
- <li><a href="">Article PDF</a> (?? MB)</li> | |
- <li><a href="">Supplementary information PDF</a> (?? MB)</li> | |
- <li><a href="https://src.adamsgaard.dk/cngf-pf-exp1">Source code for p… | |
- <li><a href="https://src.adamsgaard.dk/cngf-pf">Simulation software</a… | |
-</ul> | |
diff --git a/pages/007-commsenv.txt b/pages/007-commsenv.txt | |
t@@ -1,70 +0,0 @@ | |
-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 |