commit 2faacb3f20d411154809cdbe5fa201c569e1155c
parent db3807a0b7a4617410c13e4b34a262dcb02a879a
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Thu, 17 Dec 2020 16:45:00 +0100
commsenv: remove old post
Diffstat:
3 files changed, 0 insertions(+), 149 deletions(-)
diff --git a/pages/007-commsenv.cfg b/pages/007-commsenv.cfg
@@ -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 & Environment
-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
@@ -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 producing figures</a></li>
- <li><a href="https://src.adamsgaard.dk/cngf-pf">Simulation software</a></li>
-</ul>
diff --git a/pages/007-commsenv.txt b/pages/007-commsenv.txt
@@ -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
