Comparison of eddy covariance and chamber-based methods for measuring CO2 flux in a temperate mixed forest
文献类型：期刊论文
| 作者 | Wang, M ; Guan, DX ; Han, SJ ; Wu, JL |
| 刊名 | TREE PHYSIOLOGY
 |
| 出版日期 | 2010 |
| 卷号 | 30期号:1页码:149-163 |
| 关键词 | chamber-based measurement eddy covariance method foliage respiration net ecosystem exchange of CO2 soil respiration stem respiration |
| ISSN号 | 0829-318X |
| 通讯作者 | Wang, M, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China |
| 中文摘要 | Two methods, eddy covariance and chamber-based measurements, were employed to measure the net ecosystem CO2 exchange in a mature temperate mixed forest in 2003. The eddy covariance system was used as a reference, which was compared with the chamber-based method. Based on chamber fluxes, the ecosystem had a gross primary production of 1490 g C m(-2) year(-1), 90% of which was released as efflux back into the air via respiration of the entire ecosystem. This was comprised of about 48% from soil surface CO2 efflux, 31% from leaf respiration and 21% from stem and branch respiration. Net ecosystem exchange (NEE), estimated from the sum of daily component fluxes, was 146 g C m(-2) year(-1). Ecosystem respiration (ER), estimated from the sum of daily ecosystem respiration, was 1240 g C m(-2) year(-1). NEE was 9.8% of actual gross primary production (GPP). The eddy covariance estimates of NEE, ER and GPP were 188, 1030 and 1220 g C m(-2) year(-1), respectively. The eddy covariance estimation of NEE was higher than that of the chamber-based estimation by 22.5%. On a daily basis, NEE of the scaled chamber measurements was in acceptable agreement with eddy covariance measurement data with R-2 values of 0.71. The discrepancy between the measurement of the two methods was greater in the non-growing season primarily due to the lack of spatial variability in the scaled chamber estimates and weak atmosphere turbulence by eddy covariance measurements. There are many uncertainties for determination of absolute values of ecosystem component flux. More detailed experiments and related theoretical studies are needed in the future. |
| 学科主题 | Forestry |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [30870376, 30590382/ C011108]; Chinese Academy of Sciences [KZCX2-YW-416]; Major State Basic Research Development Program [2010CB833502] |
| 语种 | 英语 |
| WOS记录号 | WOS:000273504400013 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/53955]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang, M,Guan, DX,Han, SJ,et al. Comparison of eddy covariance and chamber-based methods for measuring CO2 flux in a temperate mixed forest[J]. TREE PHYSIOLOGY,2010,30(1):149-163. |
| APA | Wang, M,Guan, DX,Han, SJ,&Wu, JL.(2010).Comparison of eddy covariance and chamber-based methods for measuring CO2 flux in a temperate mixed forest.TREE PHYSIOLOGY,30(1),149-163. |
| MLA | Wang, M,et al."Comparison of eddy covariance and chamber-based methods for measuring CO2 flux in a temperate mixed forest".TREE PHYSIOLOGY 30.1(2010):149-163. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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