Network Observation At The GAW Stations And Atmospheric CO2 Mixing Ratios Over China

Carbon dioxide (CO2) is the most important greenhouse-gas regulated by the Kyoto Protocol. Human activities, such as fossil fuel burning and land use change, are major emitters of CO2, which will be widely recognized as drivers of global warming and climate change. At several sites in China, investigation system and the field campaign were only performed in the past decades by various companies. However, none of these measurements could successfully document spatial and temporal distributions of atmospheric CO2 and provide information that is important for our understanding of distributions and regional differences over China. Thus, it’s essential to set up a long-term observational network at multiple sites and carefully calibrate on reference scales with quality that is better controls.

The CO2 mixing ratios and variations based on internationally-recognized air sampling data from September 2006 to August 2007 is shown for the first time by it.

World Meteorological Organization (WMO) through its Global Atmosphere Watch (GAW) System, coordinates the observations of greenhouse gases in the atmosphere via a network of stations situated in more than 50 nations. Since 1750, atmospheric CO2 has increased by 38% mostly due to emissions from combustion of fossil fuels, deforestation, and land-use change, contributing 63.5% to the increase in overall radiative forcing. The Bulletins offer crucial information on the worldwide state of the environment in a concise way and emphasize current achievements of research and technology application. The 2008 Bulletin precedes the 15th session of the United Nations Frame-Work Conference on Climatechange (Copenhagen, 718 December 2009).