Experimental Research of Methane Flux Measurement by the Relaxed Eddy Accumulation Method

被引：0
|
作者：
Ge H. [1 ,2 ]
Wei Z. [3 ]
Zhang H. [3 ]
Kang L. [4 ]
机构：
[1] Nanjing Research Institute of Electronics Technology, Nanjing
[2] Key Laboratory of IntelliSense Technology, China Electronics Technology Group Corporation, Nanjing
[3] Laboratory for Climate and Oceanic-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing
[4] State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing
来源：
Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2022年 / 58卷 / 03期
关键词：
methane; proxy scalar; relaxed eddy accumulation method; turbulent flux;
D O I：
10.13209/j.0479-8023.2022.021
中图分类号：
学科分类号：
摘要：
Based on the data collected at the Atmospheric Turbulence and Atmospheric Environment Experimental Station in east China from November 2015 to November 2016, the methane flux over farmland was estimated using the relaxed eddy accumulation (REA) method. During the experiment, the empirical coefficients b of various scalars including temperature, water vapor, carbon dioxide and methane for the REA method were 0.59, 0.59, 0.59 and 0.58, respectively. The median of b decreased with the increase of the normalized sampling threshold HREA. The minimum dispersion of b for each scalar was reached with HREA=0.8. The methane flux obtained by the REA method with T as the proxy scalar was highly consistent with the flux obtained by the EC method, showing that the REA method was suitable for measuring methane flux. © 2022 Peking University. All rights reserved.
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页码：434 / 442
页数：8
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