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	tAdd ESCO2020 post - adamsgaard.dk - my academic webpage
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	commit c2c35b346b67821c2326d2de78e54cfa3a8e250e
	parent 8373cb1010197eaf1abecfe76f076e73ce2ca6bc
	Author: Anders Damsgaard <[email protected]>
	Date: Mon, 15 Jun 2020 13:48:58 +0200

	Add ESCO2020 post

	Diffstat:
	A pages/006-esco2020.cfg \| 7 +++++++
	A pages/006-esco2020.html \| 51 +++++++++++++++++++++++++++++…
	A pages/006-esco2020.txt \| 43 ++++++++++++++++++++++++++++++

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	diff --git a/pages/006-esco2020.cfg b/pages/006-esco2020.cfg
	t@@ -0,0 +1,7 @@
	+filename=esco2020.html
	+title=ESCO 2020 talk: The role of granular mechanics and porous flow for ice s…
	+description=Talk at ESCO 2020, the 7th European Seminar on Computing
	+id=esco2020
	+tags=science, glaciology, ice sheet
	+created=2020-06-15
	+updated=2020-06-15
	diff --git a/pages/006-esco2020.html b/pages/006-esco2020.html
	t@@ -0,0 +1,51 @@
	+<p><a href="https://www.esco2020.femhub.com/">ESCO 2020</a>, the
	+7th European Seminar on Computing, was held between June 8 and 12.
	+I presented my current research on ice-sheet and sediment mechanics.
	+Full abstract:</p>
	+
	+<blockquote>
	+<b>The role of granular mechanics and porous flow for ice sheet behavior in a …
	+<br><br>
	+Ice sheets and glaciers commonly flow over sedimentary deposits,
	+in particular in areas of fast ice flow. The basal sediments are
	+weakened by high water pressure provided by ice melt and limited
	+drainage. Areas of fast flow are primary contributors to sea-level
	+rise, so an accurate understanding of the thermomechanical multiphysics
	+problem of ice, water, and sediment is crucial for predicting
	+dynamical behavior under future climate scenarios. The in-situ
	+observational basis from borehole measurements shows that the
	+subglacial environment is highly dynamic. Water pressures, strain
	+rate, and glacial sliding patterns are extremely variable in time
	+and space, and hint towards significant complexity beyond current
	+modelling approaches. Sediment transport by ice flow reshapes the
	+bed, and can feed back to the ice flow physics. In this presentation
	+I explain our efforts to numerically describe the subglacial sediment
	+mechanics and fluid dynamics, and how the processes affect ice sheet
	+behavior. GPU-based particle-scale simulations using the discrete
	+element method and porous fluid dynamics provide detailed insight
	+into sediment and meltwater dynamics. However, the intense
	+computational requirements severely limit their applicability to
	+coupled simulations of ice and bed. Our newest efforts use continuum
	+models of non-local granular fluidity to simulate essential behavior
	+on larger spatial and temporal scales. We show that the variability
	+observed in field borehole measurements can be explained by considering
	+the coupled dynamics of the ice-water-sediment system. From these
	+dynamics ice flow has the ability to rapidly reshape its bed,
	+providing additional feedbacks to ice contribution to sea level in
	+a changing climate.</blockquote>
	+
	+<p>Slides and video below:</p>
	+
	+<ul>
	+<li><a href="npub/esco2020-damsgaard.pdf">slides (pdf)</a></li>
	+</ul>
	+
	+<center>
	+ <video poster="video/damsgaard_esco2020.jpg"
	+ controls preload="none" class="mediaframe">
	+ <source src="video/damsgaard_esco2020.webm" type="video/webm">
	+ <source src="video/damsgaard_esco2020.ogv" type="video/ogg">
	+ <source src="video/damsgaard_esco2020.mp4" type="video/mp4">
	+ <a href="video/damsgaard_esco2020.mp4">Link</a>
	+ </video>
	+</center>
	diff --git a/pages/006-esco2020.txt b/pages/006-esco2020.txt
	t@@ -0,0 +1,43 @@
	+[1]ESCO 2020, the 7th European Seminar on Computing, was held between June 8
	+and 12. I presented my current research on ice-sheet and sediment mechanics.
	+
	+Full abstract:
	+
	+ Title: The role of granular mechanics and porous flow for ice
	+ sheet behavior in a changing climate
	+
	+ Ice sheets and glaciers commonly flow over sedimentary deposits, in
	+ particular in areas of fast ice flow. The basal sediments are weakened by
	+ high water pressure provided by ice melt and limited drainage. Areas of
	+ fast flow are primary contributors to sea-level rise, so an accurate
	+ understanding of the thermomechanical multiphysics problem of ice, water,
	+ and sediment is crucial for predicting dynamical behavior under future
	+ climate scenarios. The in-situ observational basis from borehole
	+ measurements shows that the subglacial environment is highly dynamic. Water
	+ pressures, strain rate, and glacial sliding patterns are extremely variable
	+ in time and space, and hint towards significant complexity beyond current
	+ modelling approaches. Sediment transport by ice flow reshapes the bed, and
	+ can feed back to the ice flow physics. In this presentation I explain our
	+ efforts to numerically describe the subglacial sediment mechanics and fluid
	+ dynamics, and how the processes affect ice sheet behavior. GPU-based
	+ particle-scale simulations using the discrete element method and porous
	+ fluid dynamics provide detailed insight into sediment and meltwater
	+ dynamics. However, the intense computational requirements severely limit
	+ their applicability to coupled simulations of ice and bed. Our newest
	+ efforts use continuum models of non-local granular fluidity to simulate
	+ essential behavior on larger spatial and temporal scales. We show that the
	+ variability observed in field borehole measurements can be explained by
	+ considering the coupled dynamics of the ice-water-sediment system. From
	+ these dynamics ice flow has the ability to rapidly reshape its bed,
	+ providing additional feedbacks to ice contribution to sea level in a
	+ changing climate.
	+
	+Slides and video below:
	+
	+ - slides: https://adamsgaard.dk/npub/esco2020-damsgaard.pdf
	+ - video: https://adamsgaard.dk/video/damsgaard_esco2020.mp4
	+
	+
	+References:
	+
	+[1] https://www.esco2020.femhub.com/