Eddy correlation technique with extended applicability to nonsimple terrain

A system is described which is intended to calculate vertical fluxes of heat, moisture, momentum, and certain atmospheric pollutants at sites that are less than ideal. Fluxes, along with other turbulence statistics, are computed in real time and printed at the end of each averaging period. The main...

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Bibliographic Details
Published in:Boundary-layer meteorology 1988-01, Vol.43 (3), p.231-245
Main Author: McMillen, Robert T
Format: Article
Language:English
Online Access:Get full text
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Summary:A system is described which is intended to calculate vertical fluxes of heat, moisture, momentum, and certain atmospheric pollutants at sites that are less than ideal. Fluxes, along with other turbulence statistics, are computed in real time and printed at the end of each averaging period. The main elements of the program are 1) detrending (by use of running mean removal), 2) calculation of the entire stress tensor (which permits a three-dimensional coordinate rotation to be performed on the covariances), 3) software-adjustable timing delays for each instrument channel, and 4) real-time graphic presentation of the raw data as strip-chart images. The first two of these program elements tend to relax the normal site and sensor-leveling requirements. Sample results are presented, and the sensitivities of the calculated quantities to coordinate rotation and to mean removal time are examined for both ideal and nonideal sites.
ISSN:0006-8314