Prognostic File Structure (nPr)

 File data type = 32 bit IEEE and netCDF (in progress)

Time = individual time period (i.e., monthly ) for IEEE; All months for 1980->97 for netCDF

Vertical levels: 17 Plevs(hPa) = 10,20,30,50,70,100,150,200,250,300,400,500,600,700,850,925,1000; L18 = lowest full sigma level; 10m = 10 meters; 2m = 2 meters

All records consist of ix*iy real words, where ix, iy are the number of longitudes and latitudes respectively, in this case ix,iy = 128,64 for t42.

First longitude starts at the Greenwich meridian and the logitudes are evenly spaced going west to east. Latitudes are Gaussian, going north to south.

For more information regarding GCM details see v197 technical documentation located at http://www.gfdl.gov/~wfs/gfdlsm/DocGFDLSM_v197.html

quantity         levels(hPa)       rec. #      units 

      Vorticity        17P,L18           1-18      sec-1 

      Divergence       17P,L18           19-36     sec-1 

      U                17P,L18,10m       37-55     m sec-1 

      V                17P,L18,10m       56-74     m sec-1 

      T                17P,L18,2m        75-93     Deg C  

      qmix             17P,L18           94-111    kg kg-1 

      Z                17P,L18           112-129   m 

      omega            17P,L18           130-147   10-3 hPa sec-1

      P                Sea-level         148       N m-2 (Pa) 

      P                Surface           149       Deg C       

      Z                Surface           150       m       

      T + Land-Sea     Surface           151       Deg K * sign(L-S) -> sea <0