Comparison of Ozone Fluxes over a Maize Field Measured with Gradient Methods and the Eddy Covariance Technique
文献类型：期刊论文
| 作者 | Zhilin ZHU1; Xinzhai TANG1; Fenghua ZHAO1 |
| 刊名 | 大气科学进展:英文版
 |
| 出版日期 | 2020 |
| 卷号 | 37.0期号:006页码:586 |
| 关键词 | methods. Ozone coefficient |
| ISSN号 | 0256-1530 |
| 英文摘要 | Ozone(O3)fluxes were measured over a maize field using the eddy covariance(EC)technique and gradient methods.The main objective was to evaluate the performance of the gradient methods for measuring the O3 flux by comparing them with the EC O3 flux.In this study,turbulent exchange coefficients(K)calculated with three methods were compared.These methods were the aerodynamic gradient(AG)method(in which K is calculated by using wind speed and temperature gradients),the aerodynamic gradient combined with EC(AGEC)method,in which the friction velocity and other variables are based on EC measurements,and the modified Bowen ratio using the EC sensible heat flux and temperature gradient(MBR)method.Meanwhile,the effects of the measurement and calculation methods of the O3 concentration gradient were analyzed.The results showed that:(1)on average,the transfer coefficient computed by the MBR method was 40%lower,and the coefficient determined with the AG method was 25%higher,than that determined with the AGEC method.(2)The gradient method’s O3 fluxes with the MBR,AGEC,and AG methods were 30.4%lower,11.7%higher,and 45.6%higher than the EC O3 flux,respectively.(3)The effect of asynchronous O3 concentration measurements on the O3 gradient must be eliminated when using one analyzer to cyclically measure two-level O3 concentrations.The accuracy of gradient methods for O3 flux is related to the exchange coefficient calculation method,and its precision mainly depends on the quality of the O3 gradient. |
| 资助项目 | [National Key R&D Program of China] ; [National Natural Science Foundation of China] |
| 语种 | 英语 |
| WOS记录号 | WOS:000533080900005 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/153713]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences 2.中国科学院 |
| 推荐引用方式 GB/T 7714 | Zhilin ZHU,Xinzhai TANG,Fenghua ZHAO. Comparison of Ozone Fluxes over a Maize Field Measured with Gradient Methods and the Eddy Covariance Technique[J]. 大气科学进展:英文版,2020,37.0(006):586. |
| APA | Zhilin ZHU,Xinzhai TANG,&Fenghua ZHAO.(2020).Comparison of Ozone Fluxes over a Maize Field Measured with Gradient Methods and the Eddy Covariance Technique.大气科学进展:英文版,37.0(006),586. |
| MLA | Zhilin ZHU,et al."Comparison of Ozone Fluxes over a Maize Field Measured with Gradient Methods and the Eddy Covariance Technique".大气科学进展:英文版 37.0.006(2020):586. |
入库方式： OAI收割
来源：地理科学与资源研究所
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