| 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,,():-. |
| 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,,():-. |
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| 摘要: |
| 准确量化地表与大气间物质和能量交换对研究区域气候变化和水热循环十分重要。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,尤其是阴雨天气植被内部热储量释放对蒸散发影响与晴天相比存在较大区别,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： |
| 分类号:S271 |
| 基金项目:国家自然科学基金重点项目(52130906),中国水利水电科学研究院流域水循环模拟与调控国家重点实验室自主研究课题(SKL2022TS13),中国水科院基本科研业务费专项项目(ID0145B022021, ID0145B052021) |
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| Research progress on influencing factors in the energy closure of eddy covariance systems |
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HU Qian1, DOU Chaoyin1, WEI Zheng2, ZHANG Baozhong2, CHEN He2, HAN Congying2
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1.College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou;2.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research,National Center for Efficient Irrigation Engineering and Technology Research
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| Abstract: |
| The accurate quantification of energy and mass exchange between the surface and the atmosphere is important for studying regional climate change and hydrothermal cycle. 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 influence of the release of heat storage inside vegetation on evapotranspiration in cloudy and rainy days is quite different from that in sunny days. 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 |
