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UID:20250920T185808EDT-0263R4Vtth@132.216.98.100
DTSTAMP:20250920T225808Z
DESCRIPTION:Modeling Land-fast Ice Using a Linear Elastic Rheology\n\nLand-
 fast ice is an important component of the Arctic system\, capping the coas
 tal Arctic waters for most of the year and exerting a large influence on o
 cean-atmosphere heat exchanges. Yet\, the accurate representation of land-
 fast ice in most large-scale sea ice models remains a challenge\, part due
  to the difficult (and sometimes non-physical) parametrisation of ice frac
 ture. In this study\, a linear elastic model is developed to investigate t
 he internal stresses induced by the wind on the land-fast ice\, modelled a
 s a 2D elastic plate. The model simulate ice fracture by the implementatio
 n of a damage coefficient which causes a local reduction in internal stres
 s. This results in a cascade propagation of damage\, simulating the fractu
 re of a land-fast ice cover. \n	To estimate the large scale mechanical prop
 erties of land-fast ice\, land-fast ice break up events and ice bridge for
 mations are observed in the Siberian Arctic. These events are identified u
 sing brightness temperature imagery from the MODIS (Moderate Resolution Im
 aging Spectroradiometer) Terra and Aqua satellites\, from which the positi
 on of the flaw lead is identifiable by the opening of polynyi adjacent to 
 the land-fast ice. The shape of the land-fast ice before\, during and afte
 r these events\, along with the characteristic scale of the resulting ice 
 floes\, are compared to the model results to extrapolate the stress states
  that corresponds to these observations. These results will then be used t
 o determine the model setting that best reproduce the scale of the observe
 d break up events.\n\n \n
DTSTART:20160210T193000Z
DTEND:20160210T200000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Student Seminar: Mathieu Plante
URL:/meteo/channels/event/student-seminar-mathieu-plan
 te-255072
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