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	Spatial variations in daily average CO(2) concentrations above wetland surface of Xianghai National Nature Reserve, China
	Bai J. H. ; Hua O. Y. ; Wang Q. G. ; Zhou C. P. ; Xu X. F.
	2005
关键词	wetland surface daily average CO(2) concentration sink horizontal variation vertical variation carbon-dioxide fluxes tundra ecosystems vegetation exchange summer energy soils water fen
英文摘要	Horizontal and vertical variations of daily average CO(2) concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO(2) concentration on the four levels of height( 0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO(2) concentration under different land covers. Results showed that daily average CO(2) concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO(2) in August and acted as "sink" of CO(2). The horizontal variations on the four levels of height, along the latitude were distinct, and had the changing tendency of "decreasing after increasing" with the increase of height. The areas with obvious variations were consistent on different levels of height, and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO(2) concentrations above wetland surface were affected by surface qualities and land covers.
出处	Journal of Environmental Sciences-China
卷	17
期	1
页	54-58
收录类别	SCI
语种	英语
ISSN号	1001-0742
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24312]
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	Bai J. H.,Hua O. Y.,Wang Q. G.,et al. Spatial variations in daily average CO(2) concentrations above wetland surface of Xianghai National Nature Reserve, China. 2005.

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