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	Eddy flux corrections for CO2 exchange in broad-leaved Korean pine mixed forest of Changbai Mountains
	Wu J. B. ; Guan D. X. ; Sun X. M. ; Yu G. R. ; Zhao X. S. ; Han S. J. ; Jin C. J.
	2005
关键词	eddy covariance method carbon cycle flux correction CO2 exchange tilt correction frequency-response corrections carbon-dioxide fluxes water-vapor long-term tall vegetation covariance tower advection aircraft sites
英文摘要	Based on analysis of mechanisms causing energy no-closure and nocturnal low fluxes issues for CO(2)exchange studies by eddy covariance method, corrections were done with the raw data sets obtained from Changbai Mountains forest flux site, to evaluate the impacts of sonic anemometer tilt, frequency response limitations and advection on estimation Of CO2 exchange, respectively. The results show that the planar fit coordinate transforming method is superior to the streamline coordinate transforming method in tilt correction. The latter could cause a systematical underestimation of eddy fluxes relating with the angle of sensor and terrain tilt. The underestimation Of CO2 and energy fluxes for frequency response limitations average 3.0% and 2.0% during daytime, respectively, which increase by 9.0% and 5.5% during nighttime, respectively. The corrections of frequency response limitations are closely related to atmospheric stability. The advection loss Of CO2 fluxes is dominated by nocturnal vertical advection, which is at least 18% when the horizontal advection is neglected. It is suggested that more work be done to understand the characteristics of horizontal advection and turbulent eddies under a complex circumstance.
出处	Science in China Series D-Earth Sciences
卷	48
页	106-115
收录类别	SCI
语种	英语
ISSN号	1006-9313
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22792]
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	Wu J. B.,Guan D. X.,Sun X. M.,et al. Eddy flux corrections for CO2 exchange in broad-leaved Korean pine mixed forest of Changbai Mountains. 2005.

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