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UID:20250514T043620EDT-65544ESEu5@132.216.98.100
DTSTAMP:20250514T083620Z
DESCRIPTION:Dr. Arnold Song joins us from the US Army Cold Regions Research
  and Engineering Laboratory for his seminar Should sea ice models be more 
 discrete?: High-resolution sea ice modeling with the discrete element meth
 od. Refreshments will be served.\n\n\nAbstract:\n\nWith the push toward hi
 gher and higher spatial resolution in sea ice models\, we enter a scale re
 gime where the continuum assumption breaks down and is no longer mechanica
 lly equivalent to the physical system. We present the CRREL Sea Ice model\
 , which is based on the discrete element method (DEM)\, as an alternative 
 numerical framework for high-resolution modeling of sea ice dynamics. The 
 CRREL Sea Ice model treats the ice pack and floes as a collection of ice “
 grains” to describe the sea ice as a system where the effects of element-t
 o-element interaction significantly influence the mechanical behavior of t
 he bulk material. These pieces of ice have sufficiently small length scale
 s to capture meter scale heterogeneity of the ice pack\, which may govern 
 the bulk behavior at the scale of interest (10-1000 km scale). To capture 
 this heterogeneity\, the shape\, thickness and a bond strength between adj
 acent pieces of ice is explicitly described for each grain. In addition\, 
 a unique feature of the CRREL Sea Ice DEM is the capability to specify bon
 d strengths that are independent of ice grain thickness\, which enables th
 e model to mimic the presence of linear flaws in the ice. Our modeling app
 roach has been successfully applied to model sea ice processes such as pre
 ssure ridging (Hopkins 1998)\, aggregation due to wave-ice interaction (Ho
 pkins & Shen 2001)\, and the mesoscale evolution of the floe size distribu
 tion (Hopkins & Thorndike 2006).\n
DTSTART:20151016T193000Z
DTEND:20151016T203000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Seminar: Dr. Arnold Song
URL:/meteo/channels/event/seminar-dr-arnold-song-25613
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