Here are the variables that are available:

File 1 : ICTP Regional Climatic model V4
  Descriptor: SA_ATM.1992010100.nc
  Binary: SA_ATM.1992010100.nc
  Type = Gridded
  Xsize = 105  Ysize = 99  Zsize = 105  Tsize = 124  Esize = 1
  Number of Variables = 8
     xlon  0  y,x  Longitude on Cross Points
     xlat  0  y,x  Latitude on Cross Points
     mask  0  y,x  Land Mask
     topo  0  y,x  Surface Model Elevation
     ps  0  t,y,x  Surface Pressure
     pr  0  t,y,x  Total rain precipitation flux
     ts  0  t,y,x  Groud surface temperature
     mrso  0  t,y,x  Total soil water
ga-> sdfopen SA_SRF.1992010100.nc
Scanning self-describing file:  SA_SRF.1992010100.nc
SDF file SA_SRF.1992010100.nc is open as file 2
ga-> q file 2
File 2 : ICTP Regional Climatic model V4
  Descriptor: SA_SRF.1992010100.nc
  Binary: SA_SRF.1992010100.nc
  Type = Gridded
  Xsize = 105  Ysize = 99  Zsize = 105  Tsize = 248  Esize = 1
  Number of Variables = 21
     xlon  0  y,x  Longitude on Cross Points
     xlat  0  y,x  Latitude on Cross Points
     mask  0  y,x  Land Mask
     topo  0  y,x  Surface Model Elevation
     ps  0  t,y,x  Surface Pressure
     drag  0  t,y,x  Surface drag stress coefficient in air
     ts  0  t,y,x  Ground surface temperature
     tf  0  t,y,x  Foliage canopy temperature
     pr  0  t,y,x  Total precipitation flux
     evspsbl  0  t,y,x  Total evapotranspiration flux
     snv  0  t,y,x  Liquid water equivalent of snow thickness
     hfss  0  t,y,x  Sensible heat flux
     rsnl  0  t,y,x  Net upward longwave energy flux
     rsns  0  t,y,x  Net downward shortwave energy flux
     rsdl  0  t,y,x  Surface downward longwave flux in air
     rsds  0  t,y,x  Surface downward shortwave flux in air
     prc  0  t,y,x  Convective precipitation flux
     zmla  0  t,y,x  Atmospheric Boundary Layer thickness
     aldirs  0  t,y,x  Surface albedo to direct shortwave radiation
     aldifs  0  t,y,x  Surface albedo to diffuse shortwave radiation
     sund  0  t,y,x  Duration of sunshine