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SUMMARY:Mixing and melting: turbulence in the ice shelf/ocean boundary lay
 er - Professor John Taylor\, University of Cambridge
DTSTART:20251104T120000Z
DTEND:20251104T130000Z
UID:TALK237121@talks.cam.ac.uk
CONTACT:Ali Mashayek
DESCRIPTION:Ice shelves\, the floating extensions of ice sheets\, play an 
 important role in sea level rise by buttressing the grounded ice. Ice shel
 f collapse and the loss of this buttressing support can lead to increase d
 ischarge of grounded ice\, evidenced by the collapse of the Larsen B ice s
 helf in 2002. The fate of Antarctic ice shelves is a significant source of
  uncertainty in global projections of sea level rise.\n\nSmall-scale turbu
 lence in the ice shelf/ocean boundary layer beneath ice shelves transports
  warm waters towards the ice\, thereby influencing melting. Parameterizati
 ons of mixing and melting in the ice shelf/ocean boundary layer are relati
 vely crude\, but the physics at play are intricate and fascinating. Beneat
 h sloping ice shelves\, the relatively buoyant melt water flows up the slo
 pe and is deflected by the Coriolis force. At the same time\, stratificati
 on associated with fresh meltwater suppresses turbulence and mixing.\n\nI 
 will discuss previous and ongoing work combining simulations and observati
 ons of turbulence and mixing in ice shelf/ocean boundary layers. The work 
 spans a range of conditions from cold water ice shelves where tides domina
 te the melting signal\, to warm water ice shelves where buoyancy-driven cu
 rrents and extreme ice topography result in very complicated flow. In betw
 een I will discuss the role of diffusion when relatively flat ice shelves 
 are exposed to warm waters.
LOCATION:Department of Earth Sciences\, Tilley Lecture Theatre
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