QQ客服 官方微博 反馈留言

	Uncertainty analysis in data processing on the estimation of net carbon exchanges at different forest ecosystems in China
	Zhang L.; Zhang L.
	2012
关键词	ChinaFLUX Data processing Eddy covariance Net carbon exchange Uncertainty eddy covariance measurements energy-balance closure parameter-estimation quality assessment flux measurements dioxide exchange annual sums respiration model sites
英文摘要	Information about the uncertainties associated with eddy covariance observations of surface-atmosphere CO2 exchange is of importance for model-data fusion in carbon cycling studies and the accurate evaluation of ecosystem carbon budgeting. In this paper, a comprehensive analysis was conducted to investigate the influence of data processing procedures, focusing especially on the nocturnal data correction and three procedures in nonlinear regression method of gap filling [i.e., the selection of respiration model (REM), light-response model (LRM) and parameter optimization criteria (POC)], on the annual net ecosystem CO2 exchange estimation at three forest ecosystems in ChinaFLUX with three yearly datasets for each site. The results showed that uncertainties caused from four methodological uncertainties were between 61 and 108 g C m(-2) year(-1), with 61-93 g C m(-2) year(-1) (21-30%) in a temperate mixed forest, 80-107 g C m(-2) year(-1) (19-21%) in a subtropical evergreen coniferous plantation and 77-108 g C m(-2) year(-1) (16-19%) in a subtropical evergreen broad-leaved forest. Factorial analysis indicated that the largest uncertainty was associated with the choice of POC in the regression method across all sites in all years, while the influences of the choice of models (i.e., REM and LRM) varied with climate conditions at the measurement station. Furthermore, the uncertainty caused by data processing procedures was of approximately the same magnitude as the interannual variability in the three sites. This result stressed the importance to understand the uncertainty caused by data processing to avoid the introduction of artificial between-year and between-site variability that hampers comparative analysis.
出处	Journal of Forest Research
卷	17
期	3
页	312-322
收录类别	SCI
语种	英语
ISSN号	1341-6979
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/26856]
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 L.,Zhang L.. Uncertainty analysis in data processing on the estimation of net carbon exchanges at different forest ecosystems in China. 2012.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。