Adding airt conversion for ESMF, and required vars

Author: danishyo

src/Hydro/schism_step.F90

@@ -535,6 +535,9 @@ subroutine schism_step(it)
           if(ihconsv/=0) then
             !Assume all vars in sflux*.nc are available from atmos model or read in from atmos.nc,
             !and this routine compute other fluxes
+#ifdef USE_ATMOS
+            airt2=airt2-273.15d0 !Conv K to C, ESMF send with unit K
+#endif
             call surf_fluxes2 (wtime2,windx2,windy2,pr2,airt2, &
      &shum2,srad,fluxsu,fluxlu,hradu,hradd,tauxz,tauyz, &
 #ifdef PREC_EVAP
@@ -582,6 +585,8 @@ subroutine schism_step(it)
           windx1=windx2
           windy1=windy2
           pr1=pr2
+          airt1=airt2 
+          shum1=shum2
 
           !Read in next record
 #ifndef USE_ATMOS