Variable: Surface (top 0.1 m) soil water, kg/(m^2) Problem(s): Because frozen soil water (mrfso) does not seem to be included in total soil water (mrso) for model ugamp-a, it also MAY be absent from the supplied surface soil water. Probable cause(s): Ambiguous definition of surface soil water. Recommendation(s): PCMDI to consult with UGAMP. Date: 18 July 2000 T. Phillips