HR: 10:50h
AN: C12B-03    [Abstracts]
TI: Modelling Ice Shelf Water flow beneath Filchner-Ronne Ice Shelf
AU: * Holland, P R
EM: pahol@bas.ac.uk
AF: British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET United Kingdom
AU: Feltham, D L
EM: dlf@cpom.ucl.ac.uk
AF: British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET United Kingdom
AU: Feltham, D L
EM: dlf@cpom.ucl.ac.uk
AF: Centre for Polar Observation and Modelling, University College London, Gower Street, London, WC1E 6BT United Kingdom
AU: Jenkins, A
EM: ajen@bas.ac.uk
AF: British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 0ET United Kingdom
AB: A two-dimensional depth-averaged plume model that incorporates Coriolis forces is used to study the flow and thermodynamics of Ice Shelf Water (ISW) under Filchner-Ronne Ice Shelf (FRIS), Antarctica. Buoyant ISW plumes are generated when meltwater is released near the grounding line of large ice shelves. Due to the pressure variation of seawater's freezing temperature, they may become supercooled as they ascend along the underside of an ice shelf, causing frazil ice crystals to form and multiply within the plume. As these frazil crystals are buoyant, they can precipitate onto the ice shelf base to form marine ice (in conjunction with direct freezing). The primary aim of this study is to model the plumes responsible for the thick (>400m) deposits of marine ice observed at the base of FRIS. Results are presented which show both the general effect of Coriolis forces on ISW plumes and the particular importance of rotation on plume flow beneath FRIS.
DE: 0728 Ice shelves
DE: 0798 Modeling
DE: 4207 Arctic and Antarctic oceanography (9310, 9315)
DE: 4255 Numerical modeling (0545, 0560)
DE: 4508 Coriolis effects
SC: Cryosphere [C]
MN: Fall Meeting 2005