Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1175/JTECH-D-17-0085.1 |
A Meta-Analysis of Open-Path Eddy Covariance Observations of Apparent CO2 Flux in Cold Conditions in FLUXNETR | |
Wang, Liming1,2,3,4; Lee, Xuhui2,3; Wang, Wei2,5; Wang, Xufeng6; Wei, Zhongwang2,3; Fu, Congsheng2,3; Gao, Yunqiu2,3; Lu, Ling6; Song, Weimin1,4; Su, Peixi6![]() | |
通讯作者 | Lee, Xuhui |
来源期刊 | JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY
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ISSN | 0739-0572 |
EISSN | 1520-0426 |
出版年 | 2017 |
卷号 | 34期号:11页码:2475-2487 |
英文摘要 | Open-path eddy covariance systems are widely used for measuring the CO2 flux between land and atmosphere. A common problem is that they often yield negative fluxes or physiologically unreasonable CO2 uptake fluxes in the nongrowing season under cold conditions. In this study, a meta-analysis was performed on the eddy flux data from 64 FLUXNET sites and the relationship between the observed CO2 flux and the sensible heat flux was analyzed. In theory, these two fluxes should be independent of each other in cold conditions (air temperature lower than 0 degrees C) when photosynthesis is suppressed. However, the results show that a significant and negative linear relationship existed between these two fluxes at 37 of the sites. The mean linear slope value is -0.008 +/- 0.001 mu mol m(-2) s(-1) per W m(-2) among the 64 sites analyzed. The slope value was not significantly different among the three gas analyzer models (LI-7500, LI-7500A, IRGASON/EC150) used at these sites, indicating that self-heating may not be the only reason for the apparent wintertime net CO2 uptake. These results suggest a systematic bias toward larger carbon uptakes in the FLUXNET sites that deploy open-path eddy covariance systems. |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000416580400008 |
WOS关键词 | CARBON-DIOXIDE EXCHANGE ; NET ECOSYSTEM ; GAS ANALYZERS ; DENSITY ; DESERT ; FOREST ; WATER ; SYSTEM ; ERRORS ; TUNDRA |
WOS类目 | Engineering, Ocean ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Engineering ; Meteorology & Atmospheric Sciences |
来源机构 | 中国科学院西北生态环境资源研究院 ; 南京信息工程大学 ; 清华大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200207 |
作者单位 | 1.Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing, Peoples R China; 2.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing, Jiangsu, Peoples R China; 3.Yale Univ, Sch Forestry & Environm Studies, New Haven, CT 06511 USA; 4.Tsinghua Univ, Div Ocean Sci & Technol, Grad Sch Shenzhen, Shenzhen, Peoples R China; 5.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing, Jiangsu, Peoples R China; 6.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Cold & Arid Reg Remote Sensing Observat Syst Expt, Lanzhou, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Liming,Lee, Xuhui,Wang, Wei,et al. A Meta-Analysis of Open-Path Eddy Covariance Observations of Apparent CO2 Flux in Cold Conditions in FLUXNETR[J]. 中国科学院西北生态环境资源研究院, 南京信息工程大学, 清华大学,2017,34(11):2475-2487. |
APA | Wang, Liming.,Lee, Xuhui.,Wang, Wei.,Wang, Xufeng.,Wei, Zhongwang.,...&Lin, Guanghui.(2017).A Meta-Analysis of Open-Path Eddy Covariance Observations of Apparent CO2 Flux in Cold Conditions in FLUXNETR.JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY,34(11),2475-2487. |
MLA | Wang, Liming,et al."A Meta-Analysis of Open-Path Eddy Covariance Observations of Apparent CO2 Flux in Cold Conditions in FLUXNETR".JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY 34.11(2017):2475-2487. |
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