HR: 12:05h
AN: C22A-08    [Abstracts]
TI: Improved spatial distribution of Arctic sea ice thickness using a new model accounting for sliding friction
AU: * Feltham, D L
EM: dlf@cpom.ucl.ac.uk
AF: Centre for Polar Observation and Modelling, UCL, Gower Street, London, WC1E 6BT, 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: Wilchinsky, A V
EM: aw@cpom.ucl.ac.uk
AF: Centre for Polar Observation and Modelling, UCL, Gower Street, London, WC1E 6BT, United Kingdom
AU: Miller, P A
EM: pm@cpom.ucl.ac.uk
AF: Centre for Polar Observation and Modelling, UCL, Gower Street, London, WC1E 6BT, United Kingdom
AB: A multi-thickness sea ice model explicitly accounting for the ridging and sliding friction contributions to sea ice stress is developed. Both ridging and sliding contributions depend on the deformation type through functions adopted from Ukita and Moritz's kinematic model of floe interaction. In contrast to most previous work, the ice strength of a uniform ice sheet of constant ice thickness is taken to be proportional to the ice thickness raised to the power of 3/2, as is revealed in discrete element simulations by Hopkins. The new multi-thickness sea ice model for sea ice stress has been implemented into the Los Alamos CICE sea ice model code and is shown to improve agreement between model predictions and observed spatial distribution of sea ice thickness in the Arctic.
DE: 0750 Sea ice (4540)
DE: 0762 Mass balance (1218, 1223)
DE: 0772 Distribution
DE: 0774 Dynamics
DE: 0798 Modeling
SC: Cryosphere [C]
MN: 2007 Fall Meeting