Sample Data

Analysis Data

• NCEP GDAS
  

• NCEP Final Analysis
  

• NCEP/NCAR Reanalysis

• NCEP Eta Analyses

• ECMWF TOGA Global Analysis

• ECMWF Reanalysis

• AGRMET

Observational Data

ECMWF's TOGA Data (2.5 x 2.5 degree resolution)

• General information about this dataset
• How to use this dataset with pregrid
• Is this data available to ALL users
• How to download data automatically
• How to download data manually

General information about this dataset

• The archives at NCAR begin January 1985. 
• Data are archived at 2.5 x 2.5 degree lat/lon grid. 
• Times are 00 UTC and 12 UTC.
• For further information about the ECMWF TOGA analysis archives at NCAR:
  • See dss.ucar.edu/datasets/ds111.2
  • View the table showing which variables are available at each level
• Peculiarities/Caveats:
• Sea-surface temperature is not archived.  Skin temperature may be used with some caution.  Be aware that ground temperatures and sea-surface temperatures at coastlines may be unrealistic.
• Geopotential must be converted to geopotential height by REGRID.  Thus, both geopotential and geopotential height must be specified in the Vtable.  See the sample Vtable linked below.
• ECMWF uses different parameter tables (i.e., GRIB code numbers) than NCEP for many variables.
• Note - Usage of this dataset is restricted: [NCAR/DSS] may distribute this data to US scientists, scientists visiting US organizations, and Canadian scientists affiliated with UCAR member organizations only. This data must not be used for commercial purposes.  ECMWF must be given credit in any publications in which this data is used. A permission form must be signed and returned to DSS for use of this data. 

How to use this dataset with pregrid

• set SRC3D = GRIB
• Use the TOGA Vtables provided in pregrid/grib_misc
• Sample Vtable for using this dataset.

Is this data available to ALL users

• NO, this dataset is not generally available to all users.

How to download data automatically

• This option is only available to users with NCAR accounts
• To obtain the data:
  • use the script in REGRID/pregrid/toga/get_toga.csh
  • OR use the script available from ~mesouser/MM5V3/Util/get_toga.csh
• When you run this scripts make sure that you work in a temporary directory (such as /tmp/$USER, or /ptmp/$USER on IBM).
• Once you have downloaded the files from the MSS, you need to ftp the files to your local computer. All files must be transferred with the ftp "binary" mode.

How to download data manually

• This option is only available to users with NCAR accounts
• View the MSS-file-list
• Find the file name(s) appropriate for your case (look for year and months). For example, volume name Y16337 is the one for the March 1993 SOC case.
• Log on to NCAR's IBM or other computer.
• cd to /ptmp/$USER
• Obtain the file using this command:
  • msread -f BI  Y16337  /DSS/Y16337
• Once you have downloaded the files from the MSS, you need to ftp the files to your local computer. All files must be transferred with the ftp "binary" mode.