Atmospheric carbon dioxide is an important kind of greenhouse gas which influences global temperature.Its concentration variation could indicate the distribution of human and natural activities in various regions.Thro...Atmospheric carbon dioxide is an important kind of greenhouse gas which influences global temperature.Its concentration variation could indicate the distribution of human and natural activities in various regions.Through the non-dispersive infrared method,flask sampling of atmospheric CO_(2)concen-tration was measured weekly at four national background stations including Waliguan,Shangdianzi,Lin’an,and Longfengshan.Based on the data collected from September 2006 to August 2007,along with the Waliguan station’s experience on in situ observational data processing,the selection methods for sampling data through the atmospheric background CO_(2)concentration analysis were preliminarily discussed.On the basis of this result,the variation features of the four typical regions’atmospheric background CO_(2)concentration was analyzed for the first time.The results show that the atmospheric CO_(2)concentration at Waliguan,Shangdianzi,Lin’an,and Longfengshan is 383.5,385.9,387.8,and 384.3 ppm,respectively.During the research period,CO_(2)concentration at the Waliguan station changed slightly.However,the CO_(2)concentration changed sharply at the Shangdianzi and the Lin’an stations due to the great influence of human activities in the Jingjinji and the Changjiang Delta economic zones,and changed regularly with seasons at Longfengshan station under dual influences of human activities and plant photosynthesis.The results from this study can lay the foundation for more profound studies on atmospheric CO_(2)concentration level of different areas in China,and could be used to improve the understanding of carbon source and sink distribution.展开更多
基金Supported by National Natural Science Foundation of China(Grant No.40775078)National Non-profit Research Project to Serve the Public Interest(Grant No.GYHY200806026)International S&T Cooperation Program of MOST(Grant No.2007DFA20650)
文摘Atmospheric carbon dioxide is an important kind of greenhouse gas which influences global temperature.Its concentration variation could indicate the distribution of human and natural activities in various regions.Through the non-dispersive infrared method,flask sampling of atmospheric CO_(2)concen-tration was measured weekly at four national background stations including Waliguan,Shangdianzi,Lin’an,and Longfengshan.Based on the data collected from September 2006 to August 2007,along with the Waliguan station’s experience on in situ observational data processing,the selection methods for sampling data through the atmospheric background CO_(2)concentration analysis were preliminarily discussed.On the basis of this result,the variation features of the four typical regions’atmospheric background CO_(2)concentration was analyzed for the first time.The results show that the atmospheric CO_(2)concentration at Waliguan,Shangdianzi,Lin’an,and Longfengshan is 383.5,385.9,387.8,and 384.3 ppm,respectively.During the research period,CO_(2)concentration at the Waliguan station changed slightly.However,the CO_(2)concentration changed sharply at the Shangdianzi and the Lin’an stations due to the great influence of human activities in the Jingjinji and the Changjiang Delta economic zones,and changed regularly with seasons at Longfengshan station under dual influences of human activities and plant photosynthesis.The results from this study can lay the foundation for more profound studies on atmospheric CO_(2)concentration level of different areas in China,and could be used to improve the understanding of carbon source and sink distribution.
