celledge

INTERFACE:

   subroutine celledge(latlon, edgen, edgee, edges, edgew)

DESCRIPTION:

Southern and western edges of grid cells - regional grid (can become global as special case) Latitudes - southern/northern edges for each latitude strip. For grids oriented South to North, the southern and northern edges of latitude strip [j] are: southern = lats(j ) northern = lats(j+1) For grids oriented North to South: the southern and northern edges of latitude strip [j] are: northern = lats(j ) southern = lats(j+1) In both cases, [lats] must be dimensioned lats(lat+1) Longitudes - western edges. Longitudes for the western edge of the cells must increase continuously and span 360 degrees. Assume that grid starts at Dateline with western edge on Dateline Western edges correspond to [lonc] (longitude at center of cell) and range from -180 to 180 with negative longitudes west of Greenwich. Partial grids that do not span 360 degrees are allowed so long as they have the convention of Grid 1 with western edge of grid: >= -180 and < 180 eastern edge of grid: > western edge and <= 180 [lonw] must be dimensioned lonw(lon+1,lat) because each latitude strip can have variable longitudinal resolution

USES:

ARGUMENTS:

     implicit none
     type(latlon_type),intent(inout) :: latlon
     real(r8), intent(in) :: edgen             !northern edge of grid (degrees)
     real(r8), intent(in) :: edgee             !eastern edge of grid (degrees)
     real(r8), intent(in) :: edges             !southern edge of grid (degrees)
     real(r8), intent(in) :: edgew             !western edge of grid (degrees)

REVISION HISTORY:

   Created by Mariana Vertenstein
   2005.11.20 Updated to latlon datatype by T Craig

LOCAL VARIABLES: