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DOI	10.1002/agj2.21031
	Comparison of eddy covariance and automatic chamber-based methods for measuring carbon flux
	Shi, Rui; Su, Peixi; Zhou, Zijuan; Yang, Jianping; Ding, Xinjing
通讯作者	Su, PX (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2020
ISSN	0002-1962
EISSN	1435-0645
英文摘要	An automatic chamber (AC) is an alternative method to the eddy covariance (EC) technique for estimating of CO2 fluxes. However, few direct comparisons between two techniques have been performed on nature alpine meadows. In order to determine diurnal pattern of net ecosystem exchange (NEE) of CO2 in summer on alpine meadows, and test the NEE measurement performance of AC under site conditions, we conducted simultaneous measurements of NEE using both EC and AC methods. The NEEAC can be estimated with the information from the initial slope of the time series of CO2 mixing ratio. We found that the application of linear regression, when photosynthesis processes were considered, could lead to serious deviations, even if closure times were short. The linear regression, however, was adequate for estimating CO2 fluxes when photosynthesis processes were not involved in, at least for short chamber closing times. Using appropriate fitting method, the fluxes of AC were relatively close to that of EC, but presented a daytime underestimation and nighttime overestimation. With the subsequent friction velocity (u(*)) filtering (
关键词	NET ECOSYSTEM EXCHANGE SOIL CO2 EFFLUX GAS-EXCHANGE DIOXIDE EXCHANGE TIBETAN PLATEAU METHANE FLUXES FOREST RESPIRATION TEMPERATURE SENSITIVITY
语种	英语
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:000774652700001
来源期刊	AGRONOMY JOURNAL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254455
作者单位	[Shi, Rui; Su, Peixi; Zhou, Zijuan; Yang, Jianping; Ding, Xinjing] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China; [Shi, Rui] Beiluhe Observat & Res Stn Frozen Soil Engn & Env, Lanzhou 730000, Gansu, Peoples R China; [Yang, Jianping] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, Rui,Su, Peixi,Zhou, Zijuan,et al. Comparison of eddy covariance and automatic chamber-based methods for measuring carbon flux[J]. 中国科学院西北生态环境资源研究院,2020.
APA	Shi, Rui,Su, Peixi,Zhou, Zijuan,Yang, Jianping,&Ding, Xinjing.(2020).Comparison of eddy covariance and automatic chamber-based methods for measuring carbon flux.AGRONOMY JOURNAL.
MLA	Shi, Rui,et al."Comparison of eddy covariance and automatic chamber-based methods for measuring carbon flux".AGRONOMY JOURNAL (2020).