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植被大气间能量储存分项对能量闭合的影响在地表能量平衡研究中有重要意义.以张掖市盈科灌区玉米农田为研究区,在采用TDEC(Thermal Diffusion Equation+Correction)方法修正土壤热通量的基础上,分析了植被大气间能量储存分项对能量闭合率的影响.结果表明:能量储存分项对于能量闭合率具有一定的提升作用,平均提升幅度约为5.18%.能量储存分项对能量闭合率的影响与有效能量(Rn-G)相关.各能量储存分项对能量闭合率的贡献从大到小依次为:光合作用>植被冠层热储存>空气热储存>空气湿度变化≈露水焓变,其中后两项量级极小,可在相关研究中忽略.量级较大的前三项能量分项具有明显的单峰日变化趋势,其中光合作用项相对另两分项在时间上有所滞后.此外,不同天气条件下(如有云和无云)能量储存分项对于能量闭合率的影响不同,有云时其影响相对较大.
The influence of energy storage of vegetation atmosphere on energy closure is of great significance in the study of surface energy balance.Taking corn farmland in Yingke Irrigation Area of Zhangye as study area and using TDF (Thermal Diffusion Equation + Correction) method to correct soil heat flux The results show that the energy storage sub-item has a certain promotion effect on the energy closure rate, with an average increase of about 5.18%. The energy storage sub-item has the effect on the energy closing rate The effect of closure rate is related to the effective energy (Rn-G). The contribution of each energy storage sub-item to energy closure rate is: Photosynthesis> Vegetation canopy heat storage> Air heat storage> Air humidity change ≈ dew Enthalpy change, of which the latter two orders of magnitude is very small, which can be ignored in the related research.Moreover, the first three energy items with significant single peak diurnal variation trends, of which photosynthesis relative to the other two sub-items in time In addition, the impact of different energy conditions (such as clouds and cloudless) energy storage sub-items on the energy closure rate is different, the cloud has a relatively large impact.