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SUMMARY:Thermodynamic balance at ice-ocean interface in theory\, models an
 d maybe real life - Alena Malyarenko\, NIWA\, New Zealand
DTSTART:20170928T130000Z
DTEND:20170928T140000Z
UID:TALK82671@talks.cam.ac.uk
CONTACT:Dr Peter Davis
DESCRIPTION:Thermodynamic ice ablation includes both melting and dissolvin
 g of the ice. Existing parametrisations are usually based on the 3-equatio
 n model\, with equations that describe heat and salt flux balances togethe
 r with the freezing point equation for sea water. However\, these equation
 s do not represent both melting and dissolving conditions\, or the transit
 ion between these conditions. Nor do the 3 -equations provide a good repre
 sentation of the two dominant velocity regimes: shear-driven and buoyancy-
 driven mixing.  Turbulent heat and salt transfer coefficients need to refl
 ect different boundary layer structures that may form in varying velocity 
 and temperature regimes. \n\nHere the different conditions and velocity re
 gimes are considered in the in context of multi-year observations of tempe
 rature\, velocity and ablation rate from under the Ross Ice Shelf. These o
 bservations of a dissolving ice shelf in sub-zero conditions can be used t
 o constrain transitions from buoyancy-driven mixing to sheer-driven mixing
 .
LOCATION:British Antarctic Survey\, Innovation Centre\, Seminar Room 2
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