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	Interannual Variation of the Bowen Ratio in a Subtropical Coniferous Plantation in Southeast China, 2003-2012
	Tang Y. K. ; Wen X. F. ; Sun X. M. ; Wang H. M.
	2014
关键词	temperate deciduous forest net ecosystem exchange soil respiration carbon-dioxide primary productivity flux measurements energy-exchange pine plantation growing-season mixed forest
英文摘要	The interannual variation of the Bowen ratio, through its effect on the warming extent of available energy to the ecosystem land surface air, heavily influences the ecosystem microclimate and affects the hydrological cycle at both regional and global scales. Although the precipitation amount in southeast China is not expected to change greatly as a result of climate change, the precipitation frequency may be altered in the future. We explored the interannual variation of the Bowen ratio and its affecting mechanisms based on eddy covariance measurements in a subtropical plantation in southeast China during 2003-2012. The results indicated that the annual mean Bowen ratio was 0.3560.06, with a range of 0.29-0.45. The Bowen ratio during the dry season (July-October) positively correlated with the annual Bowen ratio (R-2 = 0.85, p<0.001). The effective precipitation frequency during the dry season, through its positive effect on shallow soil water content, indirectly and negatively affected the annual Bowen ratio. Between 2003 and 2012, the annual Bowen ratio exhibited a marginally significant decreasing trend (p = 0.061), meanwhile the effective precipitation frequency and shallow soil water content during the dry season increased significantly (p<0.001). The annual Bowen ratio may decrease further if the effective precipitation frequency and shallow soil water content during the dry season follow similar trends in the future. The warming effect of available energy to the surface air of our studied plantation may decline with the decreasing annual Bowen ratio.
出处	Plos One
卷	9
期	2
收录类别	SCI
语种	英语
ISSN号	1932-6203
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29590]
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	Tang Y. K.,Wen X. F.,Sun X. M.,et al. Interannual Variation of the Bowen Ratio in a Subtropical Coniferous Plantation in Southeast China, 2003-2012. 2014.

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