Atmospheric Forcing Data -
Winds
(AOMIP)


Regional Models

For regional AOMIP models, the procedure for calculation of of surface stress from sea-level pressure (Proshutinsky, 1997) is as follows:

  • Interpolate daily sea-level pressure pa onto model-dependent grid.


  • Calculate daily geostrophic wind as:  
    where is the unit vector in the vertical direction.


  • Calculate daily surface wind speed by retarding and turning the geostrophic wind to the left as:

    Global Models

    For global AOMIP models, it is proposed that the AOMIP surface winds (see above) be blended with those arising directly from the NCEP/NCAR reanalysis product. The blending would occur over the latitude band 60-65 degrees North. The blended data set would have the same daily temporal resolution as the AOMIP surface winds.


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