两种方法评价不同高度涡度相关系统的观测结果(英文)  

Evaluating the Measurement Results of Eddy Covariance System at Two Heights Using Two Methods

作　　者：宋霞[1] 刘允芬[1] 徐小锋[1] 

机构地区：[1]中国科学院地理科学与资源研究所

出　　处：《中国科学院研究生院学报》2005年第3期386-393,共8页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：supportedbythegrantoftheKnowledgeInnovationProgramofChineseAcademyofSciences (KZCX1 SW 0 1)andtheInnovationProjectofIGSNRR ;CAS(CX10G E0 1 0 3 0 5 )

摘　　要：主要通过常规气象参数、湍流特性和能量闭合度对 2套涡度相关系统的观测结果进行了比较研究 .对 2层高度湍流特性的研究中 ,以相似理论为基础 ,分析了垂直风速的标准差和稳定度参数z L(观测高度与莫宁霍夫长度比值 )的关系 ,2层观测结果对垂直风速的标准差和稳定度参数z L的模拟方程显示 2 3m观测数据的模拟结果更符合通用方程的经验参数 .最后对 2层高度的半年时间内 ( 2 0 0 3 0 1 0 1 )～ ( 2 0 0 3 0 6 30 )总体能量闭合度和能量闭合度的时间变化趋势作了对比研究 .结果表明 ,39m观测结果的总体能量闭合度要高于 2 3m的总体能量闭合度 ;但从各自的能量闭合度的时间变化来看 ,2 3m在冬季的能量闭合度要高于 39m ,而在春季 39m的能量闭合度要高于 2 3m .The energy balance closure and standard deviations for vertical wind velocity an d scalar quantities were applied to test the liability of measurement results of eddy covariance system at two heights, which provided the foundation for decisi on of the measurement height. The results showed that 23m was better than 39m i n measurement using the standard deviations for vertical velocity and scalar qua ntities; however, energy balance closure analysis showed that 23m was better tha n 39m in winter, while 39m better than 23m in spring. Totally, 23m is better tha n 39m in flux measurements of scalar gases and heat.

关 键 词：涡度相关 莫宁霍夫相似理论 能量平衡 观测高度 

分 类 号：P463[天文地球—大气科学及气象学]