植被大气间能量储存分项对能量闭合率的影响分析

发布时间：2018-03-11 03:02

  本文选题：能量闭合　切入点：能量储存分项　出处：《冰川冻土》2016年03期 　论文类型：期刊论文

【摘要】：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.
[Abstract]:The effect of energy storage in vegetation atmosphere on energy closure is of great significance in the study of surface energy balance. Taking maize farmland in Yingke Irrigation District of Zhangye City as the study area, the TDEC(Thermal Diffusion Equation Correction (TDEC(Thermal) method is used to modify the soil heat flux. The effect of energy storage component between vegetation and atmosphere on energy closure rate is analyzed. The results show that energy storage component can improve energy closure rate to some extent. The effect of energy storage component on energy closure rate is related to effective energy rn-G. The contribution of energy storage component to energy closure rate is in order of photosynthesis vegetation canopy thermal storage air. Heat storage air humidity variation 鈮，

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