Introduction
Introduction Statistics Contact Development Disclaimer Help
tcommsenv: remove old post - adamsgaard.dk - my academic webpage
git clone git://src.adamsgaard.dk/adamsgaard.dk
Log
Files
Refs
README
LICENSE
---
commit 2faacb3f20d411154809cdbe5fa201c569e1155c
parent db3807a0b7a4617410c13e4b34a262dcb02a879a
Author: Anders Damsgaard <[email protected]>
Date: Thu, 17 Dec 2020 16:45:00 +0100
commsenv: remove old post
Diffstat:
D pages/007-commsenv.cfg | 7 -------
D pages/007-commsenv.html | 72 -----------------------------…
D pages/007-commsenv.txt | 70 -----------------------------…
3 files changed, 0 insertions(+), 149 deletions(-)
---
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 &amp;
-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
You are viewing proxied material from mx1.adamsgaard.dk. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.