Monitoring atmospheric composition & climate
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Beginning in July 2010, the daily global tropospheric chemical composition forecasts from the MACC project are automatically downloaded to a server at Forschungszentrum Jülich where the data are harmonized (i.e. converted into a common netcdf data format and interpolated onto a common grid) and made available in quasi realtime for use as boundary conditions in regional air quality models around the world.

Our server adheres to the Web Coverage Service WCS standard as defined by the Open Geospatial Consortium OGC. This enables the user groups to flexibly define the data set they need by selecting a subset of chemical species, defining the geographical boundaries or restricting the length of the time series.

These web pages provide a human-readable interface to the Jülich WCS server. For operational air quality modeling purposes we recommend a script-based approach instead. Please contact Martin Schultz ( if you are interested in this option.

Current users of the MACC global boundaries for regional air quality models are the Indian Institute for Tropical Meteorology, Pune, India, and the Shanghai Centre for Urban Environmental Meteorology, Shanghai Meteorological Bureau (SCUEM/SMB) in China as well as the European regional models who are partners in MACC. Please note that this service is still experimental and we can provide no warranty with respect to timeliness or quality of the data. While the MACC consortium strives to produce the best global atmospheric chemical composition forecasts, this is a field that is still under development and not as mature as the daily weather forecasts which began about 50 years ago. Your feedback on the quality and usefulness of this service is therefore greatly appreciated.