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SUMMARY:Polar Oceans Seminar Talk - Bethan Wynne-Cattanach - Bethan Wynne-
 Cattanach (University of Cambridge)
DTSTART:20251119T153000Z
DTEND:20251119T163000Z
UID:TALK236710@talks.cam.ac.uk
CONTACT:Katherine Turner
DESCRIPTION:%{color:red}NB!!!!% *if you wish to attend and are external to
  BAS please let the organisers know ahead of time so they can let you in a
 t reception*\n\nHello everyone\,\n\nNext up in the Polar Oceans Seminar Se
 ries we have a talk from Bethan Wynne-Cattanach from the University of Cam
 bridge\, presenting at 2pm on the 19th of November 2025 in Seminar Room 1 
 on Large-eddy simulations of the ice-shelf-ocean boundary layer beneath ba
 sal terraces.\n\nAbstract:\nOcean-driven melting at the base of ice shelve
 s is a primary driver in the acceleration of the flow of grounded ice into
  the ocean\, leading to sea level rise. Observations have shown that basal
  topography beneath rapidly melting ice shelves in warm cavities is compli
 cated\, including topographic features such as terraces which are large en
 ough to disrupt the ice-ocean boundary layer and control melt rate. Howeve
 r\, these features are too small to be resolved in large-scale climate mod
 els\, and our current understanding from observations is limited. To addre
 ss this\, we use 3-dimensional\, turbulence permitting large-eddy simulati
 ons of the ice-ocean boundary layer to examine the influence of basal terr
 aces on ocean turbulence and ice melt. We implement the basal topography u
 sing an immersed boundary method and the size of the terrace is chosen to 
 be representative of those observed within an ice base channel of Pine Isl
 and Glacier Ice Shelf. We focus on the dynamics driven by the buoyant melt
  water plume along the terrace\, and vary the height of the terrace relati
 ve to the boundary layer thickness to investigate different flow regimes. 
 \n\nFeeling fintastic about this\,\nKat and Nico
LOCATION:BAS Seminar Room 1
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