BEGIN:VCALENDAR VERSION:2.0 PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4// BEGIN:VEVENT UID:20250427T203225EDT-9574WKKauT@132.216.98.100 DTSTAMP:20250428T003225Z DESCRIPTION: \n\nStudent Seminar Series\n\nDepartment of Atmospheric & Ocea nic Sciences\n\npresents\n\na talk by\n\nCharles Brunette\n PhD student\n\n A new free drift sea ice velocity dataset for improved representations of ice drift trajectories\n\nPrevious work shows that tracking the motion of sea ice in a Lagrangian framework can be used to produce skillful seasonal forecasts of sea ice at the pan-Arctic scale (Williams et al. 2016) and a t the regional scale (Brunette et al. 2019) and can also be used to analyz e socio-environmental impacts related to sea ice circulation (Newton et al . 2017). However\, the Polar Pathfinder sea ice motion dataset from the Na tional Snow and Ice Data Centre (Tschudi et al. 2016)\, which is commonly used for calculations of ice drift trajectories\, contains significant bia ses in drift speed and angle. The bias is especially strong in the summer when less satellite drift-vectors are available\, and the Polar Pathfinder composite product relies more heavily on poorly-constrained free drift es timates (ice motion in response to wind forcing and ocean currents in the absence of internal stresses). To improve the quality of ice motion estima tes in the summer\, we propose to compile a new sea ice free drift dataset \, based on surface winds from ERA-Interim and calibrated on drifting buoy s from the International Arctic Buoy Program.\n\nI will present recent wor k on the parameterization of an ice state dependent transfer coefficient b etween wind speed and sea ice speed\, and estimates of the near surface oc eanic currents that are necessary to constrain ice motion.\n\nWednesday No v 20/ 2.30 PM/ Room 934 Burnside Hall\n\n \n\n \n\n \n DTSTART:20191120T193000Z DTEND:20191120T203000Z LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue Sherbrooke Ouest SUMMARY:A new free drift sea ice velocity dataset for improved representati ons of ice drift trajectories URL:/meteo/channels/event/new-free-drift-sea-ice-veloc ity-dataset-improved-representations-ice-drift-trajectories-302635 END:VEVENT END:VCALENDAR