| 引用本文: | 胡 倩,窦超银,魏 征,等.涡度相关能量闭合影响因素研究进展[J].灌溉排水学报,2022,41(S2):52-57. |
| HU Qian,DOU Chaoyin,WEI Zheng,et al.涡度相关能量闭合影响因素研究进展[J].灌溉排水学报,2022,41(S2):52-57. |
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| 摘要: |
| 能量平衡闭合率是客观评价生态系统物质和能量交换的关键指标，但能量不闭合现象普遍存在，不闭合率达10%~30%。本文结合国内外研究，从仪器测量误差、观测源区尺度不匹配、复杂下垫面的涡旋和平流影响、相关能量项的忽略以及降雨过程影响等角度系统论述了造成能量平衡不闭合现象的原因，尤其涡度相关法在降雨时测量通量的可靠性值得讨论。明确指出今后研究的突破点及发展方向：从热储能项的计算适用性、考虑根层土壤热储量和冠层热储量作为附加热源以及多站点观测方法等方面进一步提升能量平衡闭合率。 |
| 关键词: 涡度相关法；能量闭合率；湍流通量；降雨 |
| DOI：10.13522/j.cnki.ggps.2022417 |
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| Research Progress on Influencing Factors in the Energy Closure of Eddy Covariance Systems |
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HU Qian, DOU Chaoyin, WEI Zheng, ZHANG Baozhong,
CHEN He, HAN Congying, ZHANG Di
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1. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China; 2. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research,
Beijing 100038, China; 3. National Center for Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
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| Abstract: |
| The energy balance ratio is the key index to objectively evaluate the material and energy exchange of ecosystem, but the phenomenon of energy balance unclosure is common, and the unclosure rate is 10%~30%. Based on the existing research at home and abroad, this paper systematically discusses the reasons for the unclosure of energy balance from the perspectives of instrument measurement error, scale mismatch of observation source area, eddies and advection of complex underlying surface, neglect of relevant energy terms and influence of rainfall process. In particular, the reliability of eddy covariance in measuring flux during rainfall is worth discussing. It clearly points out the breakthrough point and development direction of future research, that is, from the aspects of the calculation applicability of energy storage terms, considering root soil heat storage and canopy heat storage as additional heat sources, and multi station observation methods to further improve the energy balance ratio. |
| Key words: eddy covariance; energy balance ratio; turbulent fluxes; rainfall |
