Update of /u/gcmpack/MITgcm/model/src In directory forge:/tmp/cvs-serv8283 Modified Files: calc_phi_hyd.F model_ad_diff.list Added Files: calc_grad_phi_fv.F Log Message: implement Finite-Volume method for (hydrostatic) presure gradient from S.-J. Lin (QJRMS 1997), for atmosphere using sigma-coordinate.