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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.

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 Tools
    • NCL
      The NCAR Command Language (NCL) is a free interpreted language designed specifically for scientific data processing and visualization. NCL has robust file input and output with support for NetCDF, HDF, GRIB-1 and GRIB-2 file formats, including support for all published TIGGE GRIB-2 parameters. 

    • PyNGL and PyNIO

      PyNGL and PyNIO provide a Python interface to most of the NCL tool and its functionality, with an emphasis on high quality 2D visualizations. PyNIO, in particular supports TIGGE GRIB-2 with the functionality provided by NCL.

    • MET
      Model EvaluationTools (MET) is a suite of software utilities designed by NCAR Developmental Testbed Center (DTC) to the provide the capability to verify model forecasts using observational model validation data.

  • 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.

Algorithms for TIGGE diagnostics

Zoltan Toth offers Fortran examples of CAPE and CIN computations performed at NCEP:

 

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