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

General information about this dataset

The ECMWF Reanalysis is a global analysis of 15 years' worth of data.
Archives are from Jan 1979 through Dec 1993.
Data are archived on a 2.5 x 2.5 degree lat/lon grid, in GRIB format.
Surface fields:
- http://dss.ucar.edu/datasets/ds115.0/
- View the parameter table for a describes the parameters archived
3D analysis fields:
- http://dss.ucar.edu/datasets/ds115.1/
- View the parameter table for a describes the parameters and the levels on which they are archived
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.
For further information about the ECMWF Reanalysis archives at NCAR, see dss.ucar.edu/pub/ec-reanalysis.html.

How to use this dataset with pregrid

Is this data 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/era/get_era.csh
- OR use the script available from ~mesouser/MM5V3/Util/get_era.csh
When you run this scripts make sure that you work in a temporary directory (such as /tmp/$USER, or /ptmp/$USER on IBM).
- If your job is successful, you should get the following data files for the SOC case:
  - ERA_GRIB_SFC.1993JAN00Z
  - ERA_GRIB_SFC.1993JAN06Z
  - ERA_GRIB_SFC.1993JAN12Z
  - ERA_GRIB_SFC.1993JAN18Z
  - ERA_GRIB_UPA.1993MAR00Z
  - ERA_GRIB_UPA.1993MAR06Z
  - ERA_GRIB_UPA.1993MAR12Z
  - ERA_GRIB_UPA.1993MAR18Z
- Note that for upperair data (*UPA), you get the data for the periods selected for the month (i.e., all 00 UTC data are in file date-stamped with 1993MAR00Z), while for the surface fields (*SFC), you get files either date-stamped for Jan or July, since 6 monthly data are archived together.
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 for the surface data
- Find the file name(s) appropriate for your case (look for year and months). For example, for the March 1993 SOC case, you will need to obtain:
  - Y35012 1993jan01-1993jun30 00Z;
  - Y35015 1993jan01-1993jun30 06Z;
  - Y35018 1993jan01-1993jun30 12Z, and
  - Y35021 1993jan01-1993jun30 18Z
Then view the MSS-file-list for the 3D analysis data
- Find the file name(s) appropriate for your case (look for year and months). For example, for the March 1993 SOC case, you will need to obtain:
  - Y35464 1993mar 00Z;
  - Y35644 1993mar 06Z;
  - Y35824 1993mar 12Z, and
  - Y36004 1993mar 18Z
Log on to NCAR's IBM or other computer.
cd to /ptmp/$USER
Obtain the file using this command:
- msread -f BI Y35012 /DSS/Y35012
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.