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SUMMARY:Brine Fluxes from Sea Ice - Prof. Grae Worster\, DAMTP\, Universit
 y of Cambridge
DTSTART:20111201T161500Z
DTEND:20111201T173000Z
UID:TALK34322@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:Sea ice is a mushy layer - a reactive porous medium of ice cry
 stals with concentrated interstitial brine.  The brine can drain out of se
 a ice into the underlying ocean driven by buoyancy forces and as it does s
 o it creates dissolution channels\, called chimneys\, from which the dense
  brine flows as narrow plumes.  I shall review the research that has been 
 done on the formation of chimneys\, including several different experiment
 al and field studies and mathematical modelling that resolves the flow in 
 individual chimneys and the surrounding mushy layer.  Such detailed modell
 ing is too costly for inclusion in global climate models\, so I shall conc
 lude with a new\, simple one-dimensional model of the evolution of sea ice
  that takes dynamical account of brine drainage through chimneys.
LOCATION:Pfizer  Lecture Theatre\,  Department of Chemistry
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