1	Circulation and Biogeochemical Processes in a Numerical Model of the West Antarctic Peninsula
2	Outline Introduction and purpose Model details Model results and comparison with observations Proposed mechanism for cross shelf flow Summary Future plans
3	Model Configuration Rutgers/UCLA Regional Ocean Model System (ROMS) Primitive equation model with free surface Terrain following vertical coordinate General surface fluxes Open boundary conditions Parallel computer implementation using openmp Initial fields from World Ocean Data Atlas (1998) Nitrate and Silicate are included as freely evolving concentrations Bottom topography based on Sandwell and Smith (ETOPO2)
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5	Model results Circulation averaged over winter Circulation at 200 m compared to ADCP SST comparison to AVHRR climatology Vertical section of temperature compared to hydrographic measurements (Jan-Feb, April) Vertical sections of Nitrate Temperature at Tmax below 200 m Analysis of transport across the shelf break
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7	Flow Comparison at 200m
8	Surface Temperature Comparison
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10	Temperature Section North of Marguerite Bay
11	Temperature Section North of Marguerite Bay
12	Nitrate Section off Adelaide Island
13	Nitrate Comparison in Early September
14	Comparison of Tmax below 200m
15	Calculation of Across-shelf-break Flux Define the shelf-break section along the 1000 m isobath in the model. Include across-shelf sections at either end to close the box. At every point, calculate the gradient of bathymetry. Get the component of vertically integrated flow in that direction. Calculate the curvature, and the change of curvature, along the shelf-break section. Calculate the lagged correlation of onshelf transport and shelf-break curvature.
16	Integrated Cross-shelf Fluxes of Volume, Heat and Salt
17	Persistent Across-shelf-break Transport
18	Cross Shelf Transport Mechanism Flow crosses shelf break if topography turns in front of the flow. Water penetrates onshore if shelf circulation is towards the coast
19	Summary Circulation shows some comparison with present understanding of circulation Surface temperature compares well to observations Mixed layer follows realistic seasonal patterns, although is too deep in winter Onshore flux of CDW occurs at observed locations Onshore flux due to combination of bathymetric curvature and shelf circulation
20	Future Plans Expand comparison of model solutions to observations Use recent observations to construct more realistic initial conditions for T, S and nutrients Add forcing for coastal current (ice melt or Gerlache exchange) Add a dynamic sea-ice model (working on CISE by E. Hunkins) Add coastal fast ice and ice shelves including George VI sound Include tidal variability driven at the boundaries by a global model Add a bio-optical primary production model Better large scale Southern Ocean model for boundary forcing
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22	Model Temperature Sections north of Marguerite Bay
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25	Nitrate Comparison in Early March