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《Journal of Glaciology and Geocryology》 2005-02
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Variation of Near-Surface Atmospheric CO-2 Concentration in the Muztag Ata in Summer

ZHENG Wei~1, YAO Tan-dong~{2, 1}, XU Bai-qing~{1, 2} (1. Key Laboratory of Ice Core and Cold Regions Environment, CAREERI, CAS, Lanzhou Gansu 730000, China; 2. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100085, China)  
By using the CIRAS~SC CO-2 and H-2O analyzer, the precise and continuous measurements of near-surface atmospheric CO-2 concentrations and water vapor were performed in the Muztag Ata, East Pamirs, in summer 2003. This paper presents the variation characteristics of atmospheric CO-2 concentration and water vapor in the inland plateau of China in summer. Observations show a decrease trend of CO-2 concentration and a clear diurnal cycle of CO-2 concentration in summer. In short scale, the variation trend is similar to the observation results in Waliguan Station (Qinghai Province), but there are some difference between Muztag Ata Station and Mauna Loa Station (Hawaii, U.S.A). Significant negative correlation between CO-2 concentration and the atmospheric absolute humidity is also discussed. The above-mentioned phenomena reveal that the variation of near-surface CO-2 concentration in the Muztag Ata is controlled not only by photosynthesis, but also by the content of water vapor in air.
【Fund】: 中国科学院知识创新工程项目(KZCX3 SW 339;KZCX1 SW 01 10);; 国家自然科学基金项目(40121101; 40071024)资助
【CateGory Index】: X831
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