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UID:20250813T231044EDT-3670Fh4KCz@132.216.98.100
DTSTAMP:20250814T031044Z
DESCRIPTION:Please join us as we welcome Dr. Frédéric Laliberté\, a Visitin
 g fellow at Environment Canada in the Climate Processes group of the Clima
 te Research Division\, for his seminar titled 'Does the large scale circul
 ation drive the Summer Arctic tropospheric variability and warming?' Coffe
 e will be served.\n\nAbstract\n\nUnder anthropogenic forcing\, the Arctic 
 surface warms much faster than most regions of the globe\, both in models 
 and observations. This rapid warming\, known as the Arctic amplification o
 f warming\, is stronger during winter but is noticeable in all seasons. It
  extends over the whole tropospheric column so that on a fixed isobar\, wa
 rming is more pronounced closer to the North Pole. Because it has been sug
 gested that such an amplification might influence climate and weather patt
 erns in midlatitudes\, understanding the mechanisms that might contribute 
 to its appearance under anthropogenic forcing has become an important goal
  of climate science.\n\nIn this presentation\, I will present analyses tha
 t propose how the summer Arctic variability could be driven by midlatitude
  near-surface variability through the large scale atmospheric circulation\
 , both in models and observations. I will further present evidence showing
  that the relationship between the summer Arctic variability and midlatitu
 de near-surface variability might be sufficient to explain the inter-model
  spread in Arctic tropospheric warming. I will conclude by explaining how\
 , in models but not in reanalyzed observations\, the large scale circulati
 on might be sufficient to propagate most of this tropospheric warming down
  to the surface\, ultimately constraining how the summer Arctic tropospher
 ic lapse rate might change under in simulated anthropogenic scenarios.\n
DTSTART:20160520T180000Z
DTEND:20160520T190000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Seminar: Dr. Frédéric Laliberté 2
URL:/meteo/channels/event/seminar-dr-frederic-lalibert
 e-2-260891
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