| 基于大口径闪烁仪的玉米农田热通量测量研究 |
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| 引用本文： | 田勇志,刘建国,曾宗泳.基于大口径闪烁仪的玉米农田热通量测量研究[J].大气与环境光学学报,2012,7(1):51-56. |
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| 作者姓名： | 田勇志 刘建国 曾宗泳 |
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| 作者单位： | 1. 中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥 230031;中国科学院研究生院,北京100049
2. 中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室,安徽合肥,230031 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX2-YW-411) |
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| 摘 要： | 应用大口径闪烁仪可以自动获取玉米农田的显热通量,结合太阳辐射监测系统测量的净辐射,可以方便地获取潜热通量和土壤热通量.实验表明,在玉米农田的冠层上的常通量层用大口径闪烁仪测量显热通量,和涡动相关仪的数据相关度达到0.8以上.在中午的时段,玉米农田的显热通量会下降,与作物蒸腾相关的潜热通量会达到一天的峰值.大口径闪烁仪在精度和区域代表性上表现出的优势,是农业气象上获取数据资料很好的一个选择.
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| 关 键 词： | 大口径闪烁仪 显热通量 潜热通量 玉米农田 |
| 收稿时间： | 2011/5/3 |
Measurement of Heat Flux with LAS in Maize Field |
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| TIAN Yong-zhi
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LIU Jian-guo
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ZENG Zong-yong.Measurement of Heat Flux with LAS in Maize Field[J].Journal of Atmospheric and Environmental Optics,2012,7(1):51-56. |
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| Authors: | TIAN Yong-zhi LIU Jian-guo ZENG Zong-yong |
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| Affiliation: | 1 (1Key Laboratory of Environment Optics and Technology,Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Hefei 230031,China; 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Using area-average sensible heat fluxes measured with the large aperture scintillometer(LAS),in addition to the net radiation obtained with net radiometers,the latent and soil heat fluxes can be calculated with energy balance equations.Field tests showed there was a good agreement between sensible heat fluxes obtained from an LAS and an EC system.The correlation coefficient was better than 0.8 for daytime in plant canopies.The sensible heat decreased,whereas the evaporation on the surface of the canopy attained its maximum at midday.For applications in which accuracy and area-average are of critical importance for agricultural meteorology,the LAS would be a better choice. |
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| Keywords: | large aperture scintillometer sensible heat flux latent heat flux maize field |
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