CO2 background concentration in the atmosphere over the Chinese mainland
Based on the long-term monitoring data on CO2 concentration, variation trend and characteristics of CO2 background concentration in the atmosphere over the Chinese mainland are analyzed. Results show that the increasing trend of CO2 background concentration in the atmosphere over the Chinese mainland has appeared during the period of 1991–2000. The average annual CO2 growth increment is 1.59 μL/L, and the average annual CO2 growth rate is 0.44%. Distinct seasonal variations of CO2 background concentration are observed, and the averaged amplitude of CO2 seasonal variations is 10.35 μL/L. Regional variation characteristics of CO2 background concentration in the atmosphere and possible impact of human activities on these variations over the Chinese mainland are discussed as well.
KeywordsCO2 background concentration Chinese mainland CO2 growth rate CO2 seasonal variation CO2 regional variation CO2 variation trend
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- 1.Dettinger, M. D., Ghil, M., Seasonal and inter-annual variations of atmospheric CO2 and climate, Tellus, 1998, 50B(1): 1.Google Scholar
- 2.WMO, World Data Center for Greenhouse Gases (WDCGG) Data Summary, WDCGG, 1998, No. 15: 3.Google Scholar
- 3.WMO, World Data Center for Greenhouse Gases (WDCGG) Data Summary, WDCGG, 2000, No. 22: 1.Google Scholar
- 7.Bell, G. D., Halpert, M. S., Ropelewski, C. F. et al., Climate assessment for 1998, Bull. Amer. Meteor. Soc., 1999, 80(5): S1.Google Scholar
- 8.Prentice, I. C., The Carbon Cycle and Atmospheric Carbon Dioxide (eds. Houghton, J. T., Ding, Y., Griggs, D. J. et al.), IPCC, Climate Change 2001: The Scientific Basis (Chapter 3), Cambridge: Cambridge Univ. Press, 2001, 183–237.Google Scholar
- 9.Houghton, J. T., Meira, L. G., Filho, B. A. et al., IPCC, Climate change 1995: The Science of Climate Change. Cambridge: Cambridge Univ. Press, 1996, 1–572.Google Scholar
- 11.WMO, International Operations Handbook for Measurement of Background Atmospheric Pollution, WMO, No. 491. Geneva: World Meteorological Organization, 1978, 1–10.Google Scholar
- 12.WMO, Operations Manual for Sampling and Analysis Techniques for Chemical Constituents in Air and Precipitation, WMO, No.299. Geneva: World Meteorological Organization, 1971, 1–23.Google Scholar
- 13.Wen, Y. P., Shao, Z. Q., Xu, X. B. et al., Observation and investigation of variability of baseline CO2 concentration over Waliguan Mountain in Qinghai Province of China, Acta Meteorologica Sinica, 1994, 8(3): 255.Google Scholar
- 15.Liu, Z. H., Two important sinks of the atmospheric CO2, Chinese Science Bulletin, (in Chinese), 2000, 45(21): 2348.Google Scholar
- 16.Fang, J. Y., Tang, Y. H., Xiao, Q. B. et al., A evidence of CO2 release from earth’s surface in winter in the high latitude area, Science in China, Ser. D (in Chinese) 1998, 28D(6): 559.Google Scholar