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《Journal of Glaciology and Geocryology》 2007-05
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The Correlation between CO_2 Flux and Temperature of the Alpine Shrub Meadow on the Tibetan Plateau

XU Shi-xiao,ZHAO Liang,LI Ying-nian,ZHAO Xin-quan,GU Song(Key Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining Qinghai 810001,China)  
Based on the continuous CO2 flux observation with eddy covariance method conducted in the alpine shrub on the Tibetan Plateau from 1 January to 31 December in 2003 and 2004,the relationship between CO2 flux and temperature is analyzed.The following results are obtained: 1) during the warm season,net ecosystem CO2 exchange(NEE) is significantly correlated to the temperature in night(21:00~06:00),but there is no significant correlation in daytime(07:00~20:00);2) as for cold season,NEE has significant correlation with temperature both in daytime and night.Temperature increasing ratio in winter is higher than that in spring or summer over the Tibetan Plateau under the background of global warming.Consequently,owing to the future warming of climate,CO2 efflux over the ecosystem will speed up,and then,the carbon converge capability of alpine shrub meadow on the Tibetan Plateau will be weaken.
【Fund】: 中国科学院知识创新工程重要方向项目(KZCX2-YW-432-1);; 国家自然科学基金项目(30500080);; 中国科学院“百人计划"项目(0429091211);; 国家科技支撑计划项目(2006BAC01A02)资助
【CateGory Index】: Q948
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