CDO

Hello,

I use the "-setgridtype,regular" operator to convert ERA5 data from a reduced (N320) to a regular (F320) Gaussian grid.

When I use global data, everything works fine:

Grid coordinates :
     1 : gaussian                 : points=819200 (1280x640)  F320
                              lon : 0 to 359.7188 by 0.28125 degrees_east  circular
                              lat : 89.78488 to -89.78488 degrees_north

But if I use a longitudinal band (but cyclic) extraction, I obtain:

Grid coordinates :
     1 : gaussian                 : points=249405 (1279x195)  F320
                              lon : 0 to 359.4375 by 0.28125 degrees_east
                              lat : 89.78488 to 35.26931 degrees_north

So the last longitudinal point is not interpolated.
I guess CDO behaves as it is a regional grid, while it should detect the grid is cyclic and interpolate the last longitudinal point.
Is there a way to change this behavior and to tell CDO the grid is cyclic ?

Thanks,

Guillaume