The file RossSea.nc is a netCDF file containing snapshots of model output
from our high-resolution (5 km) model for the Ross Sea.  Details on the
model can be found in Dinniman et al., 2003 and Smith et al., 2003.  This
file contains snapshots of model output at 10d intervals for the period:
model day 60 - model day 420.  The model is initialized on Sept. 15, so 
this period covers a little over a year (370d) starting on Nov. 13.  

The model output is on the original horizontal grid with the full 5 km 
resolution.  The model grid is an Arakawa "C-grid", so the u and v velocities
are at different locations from each other and from any tracers (rho-points).
Please note that the u and v velocities are with respect to the local grid 
AND NOT TRUE NORTH OR EAST.  The angle between the grid and true east can be 
found in the variable "angle".

The model has a terrain following vertical coordinate system, but the output
here has been interpolated onto fixed z-depths (19: 0,10,20,30,50,75,100,
125,150,200,250,300,400,500,600,700,800,900,1000) covering the top 1000 m.  
Interested parties can contact Mike Dinniman should any information below 
1000 m (or on the original model layers) be desired.

The available variables are:

Grid Variables:

'h' - model depth (m) at all grid points
'depth' - depth (m) for each vertical point in this output file
'angle' - angle (radians) between the model grid (at rho-points) and true 
           north
'mask_rho' - mask (0=land, 1=water) for rho-points
'mask_u' - mask for U-points
'mask_v' - mask for V-points
'lat_rho' - latitude (degrees) for each rho-point
'lon_rho' - longitude (degrees) for each rho-point
'lat_u' - latitude (degrees) for each U-point
'lon_u' - longitude (degrees) for each U-point
'lat_v' - latitude (degrees) for each V-point
'lon_v' - longitude (degrees) for each V-point
'ocean_time' - time (days) since the start of the model run (Sept. 15)

3D (x,y,time) Variables:

'zeta' - surface height (m)
'aice' - ice concentration (% 0-100)
'ubar' - barotropic U-velocity (m/s - on U-points)
'vbar' - barotropic V-velocity (m/s - on V-points)

4D (x,y,z,time) Variables:

'u' - baroclinic U-velocity (m/s - on U-points)
'v' - baroclinic V-velocity (m/s - on V-points)
'w' - vertical velocity (m/s - w.r.t fixed horizontal layers and not the
       model layers) (Note that this definition of vertical velocity is
       not used at all in the model, is purely done for output and is
       quite variable for several reasons.)
'temp' - temperature (deg C)
'salt' - salinity (psu)
'nitrate' - nitrate (micromole/liter)
'silicate' - silicate (micromole/liter)
'chlorophyll' - chlorophyll (microgram/liter)


Contact:

Mike Dinniman
Center for Coastal Physical Oceanography
Old Dominion University
757 683-5559
msd@ccpo.odu.edu


References:

Dinniman, M.S., J.M. Klinck and W.O. Smith, Jr. 2003.
Cross shelf exchange in a model of the Ross Sea circulation and 
biogeochemistry.  Deep-Sea Research II, in press.

Smith, W.O., Jr., M.S. Dinniman, J.M. Klinck and E.E. Hofmann, 2003.
Biogeochemical climatologies of the Ross Sea, Antarctica.
Deep-Sea Research II, in press.