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PAGE 2

Background information about the characteristics of this data may be found in An Introduction to Atmospheric and Oceanographic Datasets. There is general basic information in its Introduction .

More specific information may be found in these chapter(s) or section(s): Analyzed and Model Data .

See this for information about the objective analysis.

TYPES:

Operational
Gridded analyses
Synoptic
Surface analyses
Upper air analyses
Forecast

COVERAGE:

Northern hemisphere
Polar stereographic projection grid
Tropical region
See this for a diagram of the grid.

UPDATES:

None

TIMES:

daily 12-hourly
00Z 12Z
Includes these forecasts: 6-hour 12-hour 24-hour 36-hour 48-hour 72-hour

VARIABLES:

See this for information about some missing humidity grids.

See ds719.0 for tropical wind data for 1974-1978.

LEVELS:

Stratospheric grids discontinued 01 march 82, see DS067.0.

VARIABLE / LEVEL TABLES:

Table of Levels and Variables (List B - ON84 - 65x65)

(in 1996: 81 grids max per hemisphere per analysis time)

   tpause  p t
      100  z t u v
      150  z t u v
      200  z t u v       plus  6-hr fcst of W
      250  z t u v
      300  z t u v rh    plus 12-hr fcst of z t u v
                         plus 36-hr fct  of z
 sigma(2)  rh         (0.67-1.00, 0.33-0.67)
      400  z t u v rh
      500  z t u v rh    plus  6-hr fcst of W
                         plus 12-hr fcst of z t u v
                         plus 24-hr fcst of z
                         plus 36-hr fcst of z
                         plus 36-hr fcst of W
                         plus 48-hr fcst of z
                         plus 72-hr fcst of z
      700  z t u v rh    plus 36-hr fcst of z
      850  z t u v rh    plus  6-hr fcst of W
                         plus 12-hr fcst of z t u v
                         plus 36-hr fcst of z
    bound  rh
     1000  z t u v rh    plus 24-hr fcst of z
                         plus 36-hr fcst of z
                         plus 48-hr fcst of z
                         plus 72-hr fcst of z
      msl  slp
      sfc  sfct          plus 36-hr fcst of acc precip

Table of Levels and Variables (List B - ON84 - Tropicals)

(in 1996: 14 grids max per analysis time)

      200  u v
      250  u v
      300  u v
      500  u v
      700  u v
      850  u v
     1000  u v

FORMAT:

Be aware of these processing issues.

MM5, WRF and RAMS users click here.

VOLUME:

Through 1990sep30 -

List                average:    total:    growing by (latest):
A0   47x51 all         MB/day        GB        MB/day
A1   47x51 basic       MB/day        GB        MB/day
A2   47x51 etc&trop    MB/day        GB        MB/day
A3   47x51 fcst        MB/day        GB        MB/day
B    65x65          1.3MB/day   7.343GB     1.3MB/day
B    tropicals      0.1MB/day   0.550GB     0.1MB/day

COST:

Users with NCAR computing accounts have free access from the NCAR MSS through clicking the

tab in the navigation bar.

For all others, costs depend on the amount requested, and the DSS standard charging rate applies as shown on the service charges page.

To send a data request to a staff member, please use this form.

Updated 22 July 2005