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Experimental study on soil CO2 emission in the alpine grassland ecosystem on Tibetan Plateau

文献类型：EI期刊论文

作者Zhang Xianzhou; Shi Peili
发表日期2005
关键词Carbon dioxide Soils Solar radiation Vegetation
英文摘要The Tibetan Plateau, the Roof of the World, is the highest plateau with a mean elevation of 4000 m. It is characterized by high levels of solar radiation, low air temperature and low air pressure compared to other regions around the world. The alpine grassland, a typical ecosystem in the Tibetan Plateau, is distributed across regions over the elevation of 4500 m. Few studies for carbon flux in alpine grassland on the Tibetan Plateau were conducted due to rigorous natural conditions. A study of soil respiration under alpine grassland ecosystem on the Tibetan Plateau from October 1999 to October 2001 was conducted at Pangkog County, Tibetan Plateau (31.23°N, 90.01°E, elevation 4800 m). The measurements were taken using a static closed chamber technique, usually every two weeks during the summer and at other times at monthly intervals. The obvious diurnal variation of CO2 emissions from soil with higher emission during daytime and lower emission during nighttime was discovered. Diurnal CO2 flux fluctuated from minimum at 05:00 to maximum at 14:00 in local time. Seasonal CO2 fluxes increased in summer and decreased in winter, representing a great variation of seasonal soil respiration. The mean soil CO2 fluxes in the alpine grassland ecosystem were 21.39 mgCO2 · m-2 · h-1, with an average annual amount of soil respiration of 187.46 gCO2 · m-2 · a-1. Net ecosystem productivity is also estimated, which indicated that the alpine grassland ecosystem is a carbon sink. Copyright by Science in China Press 2005.
出处Science in China, Series D: Earth Sciences
卷48期:SUPPL.1页:218-224
收录类别EI
语种英语
源URL[http://ir.igsnrr.ac.cn/handle/311030/24373]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714		 Zhang Xianzhou,Shi Peili. Experimental study on soil CO2 emission in the alpine grassland ecosystem on Tibetan Plateau. 2005.

入库方式： OAI收割

来源：地理科学与资源研究所

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