FREQUENCY-RESPONSE CORRECTIONS FOR EDDY-CORRELATION SYSTEMS
FREQUENCY-RESPONSE CORRECTIONS FOR EDDY-CORRELATION SYSTEMS
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DOI：
10.1007/bf00122754
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发表时间：
1986-10-01
影响因子：
4.3
通讯作者：
MOORE, CJ
中科院分区：
文献类型：
--
作者：
MOORE, CJ
本文给出了涡流相关系统由于传感器响应、光程平均、传感器分离和信号处理而引起的频率响应的简化表达式。本文讨论了一种估算和校正通量和方差测量中频率响应损失的常规方法，并以水文研究所的“Hydra”涡动相关系统为例进行了说明，结果表明，这种系统的通量损失一般为感热通量和潜热通量的5 ~ 10%，但是在某些条件下对于动量通量和方差测量可以大得多，包括一个微计算机程序，只要稍加修改，可用于估计来自具有不同或附加传感器的其它涡流相关系统的通量损失。
Simplified expressions describing the frequency response of eddy correlation systems due to sensor response, path-length averaging, sensor separation and signal processing are presented. A routine procedure for estimating and correcting for the frequency response loss in flux and variance measurements is discussed and illustrated by application to the Institute of Hydrology's ‘Hydra’ eddy correlation system.The results show that flux loss from such a system is typically 5 to 10% for sensible and latent heat flux, but can be much larger for momentum flux and variance measurements in certain conditions.A microcomputer program is included which, with little modification, can be used for estimating flux loss from other eddy correlation systems with different or additional sensors.