Towards standards for measuring greenhouse gas fluxes from agricultural fields using instrumented towers
Towards standards for measuring greenhouse gas fluxes from agricultural fields using instrumented towers
复制标题
制定使用仪表塔测量农田温室气体通量的标准
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Riddle
中科院分区：
文献类型：
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作者：
E. Pattey;G. Edwards;I. Strachan;R. Desjardins;S. Kaharabata;C. Riddle
这是对使用仪表塔测量湍流通量的可用技术的讨论。本综述重点关注农业系统中二氧化碳 (CO2)、甲烷 (CH4) 和一氧化二氮 (N2O) 的通量测量以及测量标准和协议的制定。农业生态系统面临着独特的挑战，因为它们在相对较短的时间内（即几个月）经历了大的叶面积指数（LAI）和冠层结构的变化，再加上许多温室气体源是扩散的。本综述考察了微气象技术的理论和应用的各个方面，重点关注通量梯度、涡流累积和涡流协方差技术。还探讨了仪器放置、传感或响应以及噪声特性。讨论了闭路和开路痕量气体传感器以及常用气象仪器的微气象方法的创新应用。采用快速响应单...
This is a discussion of the available technology for measuring turbulent fluxes using instrumented towers. This review focuses on the flux measurements of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) for agricultural systems and the development of standards and protocols for measuring them. Agroecosystems present unique challenges because they undergo large leaf area index (LAI) and canopy architecture changes in a relatively short period of time (i.e., months) coupled with the fact that many of the greenhouse gas sources are diffuse. This review examines all aspects of the theory and application of the micrometeorological techniques, with focus on the flux gradient, eddy accumulation and eddy covariance techniques. Instrument placement, sens or response and noise characteristics are also explored. Innovative applications of micrometeorological methods are discussed for closed- and open-path trace gas sensors and commonly used meteorological instrumentation. The use of fast response single-...