AMIP II standard model output: data volume estimates

(in units of Mb)

The table below provides an estimate to the data volume of the model output for an AMIP II simulation. Estimates are shown for several different horizontal resolutions. For Table 1it is assumed that there are 17 levels. With the Library for AMIP data transmission standards (LATS), modelers can choose the data format used for submitting their data to PCMDI. With the netCDF option, all data will be at 32bit. If GRIB is used, the compression can be controlled. For monthly mean data the compression should not exceed reducing the data to 16bit. Tests are underway to determine compression limitation for 6-hourly data. Tables 4 and 5 of the AMIP II standard output are not included below because they represent << %1 of the total data volume. Total volume estimates (with and without the optional Table 6) included at the bottom of the table below.
 

Horizonal resolution= 4x5 2x2 T42  T63
# of grid points= 3,240 16,200 8,192 18,240
    Table 1     
32bit 1,229 6,147 3,108 6,921
16bit 615 3,073 1,554 3,460
         
   
Table 2 
  
  4x5 2x2 T42  T63
32bit 105 525 265 591
16bit 52 262 133 295
         
   
Table 3 
  
  4x5 2x2 T42 T63
       
32bit 2,100 10,498 5,308 11,820
16bit 1,050 5,249 2,654 5,910
8 bit 525 2,624 1,327 2,955
         
   
Table 6  
  
  4x5 2x2 T42 T63
       
32bit 9,238 46,189 23,357 52,006
16bit 4,619 23,095 11,679 26,003
8bit 2,309 11,547 5,839 13,001
         
   
Totals 
  
  4x5 2x2 T42 T63
       
32bit 12,672 63,359 32,039 71,337
16bit 6,336 31,679 16,020 35,669
16 bit (monthly) and 
8 bit (6 hourly)
 3,502 17,508 8,853 19,712
         
   
Totals:
Tables 1-5
  
  4x5 2x2 T42 T63
       
32bit 3,434 17,169 8,682 19,331
16bit 1,717 8,585 4,341 9,666
16 bit (monthly) and 
8 bit (6 hourly)
 1,192 5,960 3,014 6,711
         
   
% of total 
by table
    
  Table 1 Table 2 Table 3 Table 6
  9.7% 0.8% 16.6% 72.9%

Last Updated on 7/15/97