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 | |
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diff --git a/pages/006-esco2020.cfg b/pages/006-esco2020.cfg | |
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+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 | |
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+<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/ |