Variational Data Assimilation for the Global Ocean - Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications - page 327

1=12 ı global HYCOM/NCODA
forecast system on January 12, 2012. An independent infrared (IR) analysis of the north edge of
the current system performed by the Naval Oceanographic Office is overlain. A white ( black ) line
means the IR analysis is based on data less (more) than four days old

Fig. 13.13 Sea surface height in the Kuroshio region from the

Table 13.2 3DVAR run times for six of the seven global HYCOM analysis domains on 28
January 2012

Number Number Solver Post proc Total

Domain Grid size procs obs (min) (min) (min)

Atlantic 1,751 1,841 42 88 613,525 4.8 5.6 10.7

Indian 1,313 1,569 42 64 468,828 6.6 7.3 14.2

Pacific 2,525 1,841 42 416 1,028,369 6.7 2.6 9.8

Arctic Ocean 1,630 551 42 16 11,879 0.1 0.2 1.7

Arctic Atlantic 1,490 551 42 16 82,137 0.1 0.6 2.3

Arctic Pacific 1,335 551 42 16 17,630 0.4 0.2 1.6

520,250,556 a Totals 616 2,222,368

a Total for grid size is the total number of grid points

Full resolution correction fields for the model update are produced for each analysis
variable in the NCODA 3DVAR post-processing step by interpolation. This reduced
resolution grid option is used in global HYCOM where the solution vector is
mapped to every other model grid point.