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ECMWF tools

Data access

1. Data portal
   The simplest way how to get rather smaller ad hoc data samples (approximately up-to 20 000 retrieved fields per request)  
2. Batch access
   The ECMWF access in batch should be used for most common types of work (big data samples retrievals)
3. CMA data portal
   2nd official TIGGE data portal where all data from all partners can be downloaded. The data on both official portals hosted at ECMWF and CMA is synchronized via LDM.

Data  monitoring

1. Visual data quality monitoring
   For the purpose of simple visual data quality monitoring some maps and histograms are produced for every forecast date and chosen model outputs (see the link in the Resources section). Only the first perturbed eps member and control forecast (if exists) are monitored at two chosen forecast leading times (0 and the latest available one common for all monitored datasets)
2. History page
   The data gaps caused by any kind of problems can be checked via so called TIGGE-LAM history web page linked in the Resources section.

External tools

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GRIB2 and NETCDF conversion

• GRIB_API
  ECMWF has developed a C GRIB API for encoding, decoding and data manipulation in GRIB-2 format. All TIGGE parameters should be recognized through GRIB_API.
• grib2_to_netcdf
  grib2_to_netcdf is an NCAR  conversion utility built on the ECMWF GRIB_API and Unidata NetCDF libraries. The utility converts regular lat/lon gridded TIGGE data from GRIB-2 to NetCDF format.

Other External tools

• NCAR TIGGE portal
  A wide range of tools for manipulating TIGGE data is available there. They include tools from a range of different providers to visualise and manipulate GRIB2 and netcdf data, and to support model validation.
• TIGGE Museum
  The museum includes a set of scripts to download TIGGE data, and plot it (using GrADS ) in file TIGGE_sample.tar.gz - available directly from here.
• Cyclone XML Tools
  for use with Cyclone XML data are available from the CAWCR CXML website.

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