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SUMMARY:How many oceans are there really? Using Lagrangian ocean dynamics 
 to study climate\, marine ecosystems and plastic accumulation - Erik van S
 ebille (Grantham Institute/Physics\, Imperial College)
DTSTART:20160307T130000Z
DTEND:20160307T140000Z
UID:TALK63810@talks.cam.ac.uk
CONTACT:Doris Allen
DESCRIPTION:The ocean is in constant motion\, with water circulating withi
 n and flowing between basins. As the water moves around\, it caries heat a
 nd nutrients\, as well as larger objects like planktonic marine species an
 d plastic litter\, around the globe.\n\nThe most natural way to study the 
 pathways of water and the connections between ocean basins is in a Lagrang
 ian framework\, where the ocean circulation is traced out using particle t
 rajectories. The trajectories can come from either computing of virtual fl
 oats in high-resolution ocean models\, or from the paths of free-flowing o
 bservational drifters (surface buoys or Argo floats) in the real ocean. Us
 ing ideas from dynamical systems theory\, the trajectories can be used to 
 understand spatial connectivity patterns.\n\nIn this seminar\, I'll give a
 n overview of some of my recent work with Lagrangian particles\, in fields
  as diverse as dynamical oceanography\, dynamical systems theory\, marine 
 ecology\, palaeoclimatology\, genetics\, and even archeology. Central to e
 ach of these studies is the question on how connected the different ocean 
 basins are\, and on what time scales water flows between the different reg
 ions of the ocean. This will allow us to redraw the boundaries of the ocea
 ns\, based on dynamical considerations rather than geographical convention
 s.
LOCATION:MR5\, Centre for Mathematical Sciences
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