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|Global Atmosphere Watch
The World Data Centre for Greenhouse Gases
The World Data Centre for Greenhouse Gases (WDCGG) was established at the Japan Meteorological Agency (JMA) in October 1990 and collects and distributes data on the mixing ratios of greenhouse (CO2, CH4, CFCs, N2O, etc.) and related reactive (O3, CO, NOx, SO2, VOC, etc.) gases in the atmosphere and the ocean. Simultaneously measured meteorological parameters are also recorded at WDCGG.
Data contributors submit their data on the Internet in accordance with the Revision of the WDCGG Data Submission and Dissemination Guide (GAW Report No. 188). As of March 2012, 325 stations from 65 countries submitted observational data for 111 species of greenhouse and related gases to the WDCGG. The WDCGG periodically publishes the "WMO WDCGG DVD" and "WMO WDCGG Data Summary". The "DVD" contains hourly, daily, monthly and annual mean values, as well as information on site environment, measurement procedures, and calibration techniques. Information on contact persons, methods of measurement and calibration at the observation stations is also made available, and all data can be accessed from the WDCGG website. The "Data Summary" includes averaged results from the past and present conditions on regional, and global scales.