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	t006-esco2020.txt - adamsgaard.dk - my academic webpage
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	t006-esco2020.txt (2324B)
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	1 [1]ESCO 2020, the 7th European Seminar on Computing, was held between Ju…
	2 and 12. I presented my current research on ice-sheet and sediment mecha…
	3
	4 Full abstract:
	5
	6 Title: The role of granular mechanics and porous flow for ice
	7 sheet behavior in a changing climate
	8
	9 Ice sheets and glaciers commonly flow over sedimentary deposits, in
	10 particular in areas of fast ice flow. The basal sediments are weaken…
	11 high water pressure provided by ice melt and limited drainage. Areas…
	12 fast flow are primary contributors to sea-level rise, so an accurate
	13 understanding of the thermomechanical multiphysics problem of ice, w…
	14 and sediment is crucial for predicting dynamical behavior under futu…
	15 climate scenarios. The in-situ observational basis from borehole
	16 measurements shows that the subglacial environment is highly dynamic…
	17 pressures, strain rate, and glacial sliding patterns are extremely v…
	18 in time and space, and hint towards significant complexity beyond cu…
	19 modelling approaches. Sediment transport by ice flow reshapes the be…
	20 can feed back to the ice flow physics. In this presentation I explai…
	21 efforts to numerically describe the subglacial sediment mechanics an…
	22 dynamics, and how the processes affect ice sheet behavior. GPU-based
	23 particle-scale simulations using the discrete element method and por…
	24 fluid dynamics provide detailed insight into sediment and meltwater
	25 dynamics. However, the intense computational requirements severely l…
	26 their applicability to coupled simulations of ice and bed. Our newest
	27 efforts use continuum models of non-local granular fluidity to simul…
	28 essential behavior on larger spatial and temporal scales. We show th…
	29 variability observed in field borehole measurements can be explained…
	30 considering the coupled dynamics of the ice-water-sediment system. F…
	31 these dynamics ice flow has the ability to rapidly reshape its bed,
	32 providing additional feedbacks to ice contribution to sea level in a
	33 changing climate.
	34
	35 Slides and video below:
	36
	37 - slides: https://adamsgaard.dk/npub/esco2020-damsgaard.pdf
	38 - video: https://adamsgaard.dk/video/damsgaard_esco2020.mp4
	39
	40
	41 References:
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	43 [1] https://www.esco2020.femhub.com/