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UID:20250910T211751EDT-8625vesgwV@132.216.98.100
DTSTAMP:20250911T011751Z
DESCRIPTION:Please join us as we welcome Dr. Carolina Dufour from the depar
 tment of Atmospheric and Oceanic Sciences at Princeton University for her 
 seminar titled 'On the role of the ocean mesoscale in the meridional circu
 lation of the Southern Ocean'.Refreshments will be served.\n\nAbstract\n\n
 The Southern Ocean plays a crucial role in the climate system by taking up
  and redis-tributing heat and carbon at the global scale. Because the Sout
 hern Ocean is one of the most under-sampled regions of the global ocean\, 
 questions still remain regarding the merid-ional circulation and its respo
 nse to climate change. One important player in the Southern Ocean circulat
 ion is the transport eff?ected by transient mesoscale eddies. These eddies
 \, which are ubiquitous features of the order of 10 to 100 km\, oppose the
  wind-driven circulation and transport physical and biogeochemical tracers
 . However\, due to their relatively small size and high-temporal variabili
 ty\, transient mesoscale eddies are challenging to observe and model.\n\nI
 n this seminar\, we will investigate the role of transient mesoscale eddie
 s in the Southern Ocean meridional circulation using ocean models at eddyi
 ng resolution. We will ?first examine how the transport e?ffected by trans
 ient mesoscale eddies contributes to reduce the intensi?-fication of the m
 eridional overturning circulation driven by increasing westerly winds. We 
 will then explore the role played by transient mesoscale eddies in transpo
 rting heat and biogeo-chemical tracers across the intense fronts of the So
 uthern Ocean. While in both cases transient mesoscale eddies are found to 
 play an important role in compensating the wind-driven circulation and tra
 nsporting tracers\, another important player\, stationary meanders\, emerg
 es from our analyses. Stationary meanders are particularly vigorous in the
  Southern Ocean due to the intense Antarctic Circumpolar Current intersect
 ing with numerous major topographic obstacles along its path around Antarc
 tica. Our results highlight the complementarity of stationary meanders and
  transient eddies in the compensation of the wind-driven circulation and t
 ransport of climate-relevant tracers. Moreover\, the importance of station
 ary meanders\, or in other words\, the importance of the inter- and intra-
 basin variability of the circulation\, provides a new picture of the South
 ern Ocean circulation that departs from the traditional two-dimensional zo
 nally-averaged view.\n
DTSTART:20160310T203000Z
DTEND:20160310T213000Z
LOCATION:Room 934\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Seminar: Dr. Carolina Dufour
URL:/channels/event/seminar-dr-carolina-dufour-259492
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