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UID:20250811T152343EDT-7384LJP8uV@132.216.98.100
DTSTAMP:20250811T192343Z
DESCRIPTION:Atmospheric and Oceanic Sciences Departmental Seminar Series\n
 \npresents\n\nImproving ice-ocean simulations of the Gulf of St. Lawrence 
 for operational applications \n\na talk by\n\nFrançois Roy\n	Canadian Centr
 e for Meteorological and Environmental Prediction (CCMEP)\, Environment an
 d Climate Change Canada (ECCC)\, Montréal\, Canada\n\nA hierarchy of opera
 tional prediction systems are being run at the Canadian Centre for Meteoro
 logical and Environmental Prediction (CCMEP) to produce daily analyses and
  forecasts of the physical properties of the ocean and sea ice (e.g. sea s
 urface height\, ocean currents and temperature\, ice formation and motion)
 . These systems combine the NEMO-CICE modeling framework with real time da
 ta assimilation. They are forced by or coupled to the atmospheric model GE
 M supporting operational weather analysis and forecast at CCMEP. A relativ
 ely seamless approach is applied to downscale our daily global ice-ocean a
 nalysis and forecast (1/4⁰ resolution) to a regional system (1/12⁰) in tur
 n feeding high-resolution coastal simulations covering the Gulf St. Lawren
 ce (GSL\, 2 km – 500 m) and Estuary (100 m).\n\nIn the GSL\, water masses 
 evolve under a complex estuarine circulation. Continental freshwaters trav
 el downstream at the ocean surface and mix with some of the cold Atlantic 
 waters entering the GSL through Belle-Isle Strait (Labrador Current)\, and
  with some of the warmer and saltier Atlantic waters entering through Cabo
 t Strait at depth in the Laurentian channel that crosses the continental s
 helf outside the GSL and connects to the Gulf Stream area. The density dri
 ven circulation is modulated by strong tidal flows interacting with a comp
 lex topography to mix water masses\, and by the effect of an important sea
 sonal cycle. A strong heat loss in fall and winter lead to the formation o
 f a sea ice cover and a thickening of the cold intermediate layer (CIL\, ~
 30-150m).\n\nAfter a brief overview of our hierarchy of prediction systems
 \, results from coastal simulations in the GSL are presented\, focusing on
  the circulation and evolution of water masses. The importance of atmosphe
 ric forcing resolution (from 33 km to 2.5 km) is first examined\, as wind 
 channeling (intensity) in the Upper and Lower Estuary affects stratificati
 on and the CIL formation and penetration. At larger scale\, as shown\, par
 ameters controlling bottom friction and turbulent kinetic energy at the oc
 ean surface (wave breaking) also play an important role in predicting wate
 r masses and sea surface temperature\, respectively.\n\n(All collaborators
  on this project: François Roy1\, Gregory C. Smith1\, Audrey-Anne Gauthier
 2\, Jean-Philippe Paquin1\, Frederic Dupont1\, Simon St-Onge Drouin3\, Sim
 on Senneville4\, Jérôme Chanut5\, Jean-François Lemieux1\, Bruno Tremblay2
 / \n	1- Canadian Centre for Meteorological and Environmental Prediction (CC
 MEP)\, Environment and Climate Change Canada (ECCC)\, Montréal\, Canada/ 2
 - 9I���������\, Montreal\, Canada/ 3- Institut Maurice-Lamontagne\, 
 Fisheries and Oceans Canada\, Mont-Joli\, Canada/ 4- Institut des Sciences
  de la Mer (ISMER)\, Rimouski\, Canada/ 5- Mercator-Océan International\, 
 Toulouse\, France)\n\nMonday Feb 03/ 3:30 PM/ Burnside Hall/ Room 934\n
DTSTART:20200203T203000Z
DTEND:20200203T220000Z
LOCATION:Room 934
SUMMARY:Improving ice-ocean simulations of the Gulf of St. Lawrence for ope
 rational applications 
URL:/meteo/channels/event/improving-ice-ocean-simulati
 ons-gulf-st-lawrence-operational-applications-304141
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