TEMPLEV   List of potential temperature levels for vertical interpolation, (up
           to 100 levels in degrees Kelvin, ordered with smallest (closest to
           ground) values first, REAL, default is no interpolation).  The spec-
           ification of at least one value for this keyword is interpreted as a
           request for interpolation from sigma or hybrid surfaces to potential
           temperature surfaces.  The ICP <PRESSLE> cannot be used if values
           are specified for TEMPLEV.

            Example:
             TEMPLEV = 320.,340.,360.,380.,400.,420.

              This example requests that all fields be interpolated to the
           potential temperature levels specified.