attenuated eddy covariance method for latent heat flux measurements

1 An attenuated eddy covariance (AEC) method is proposed, combining the use of a relatively robust three-dimensional sonic anemometer and a ventilated capacitive hygrometer-thermometer (CHT). The CHT is able to resolve a large enough frequency region of the water vapor density turbulent fluctuations...

Full description

Saved in:
Bibliographic Details
Published in:Water resources research 2007-04, Vol.43 (4), p.n/a
Main Authors: Dias, N.L, Duarte, H.F, Maggiotto, S.R, Grodzki, L
Format: Article
Language:English
Subjects:
atmospheric circulation
attenuated eddy covariance method
capacitive hygrometers
data analysis
eddy correlation
eddy covariance method
heat transfer
hydrologic cycle
latent heat flux
new methods
relative humidity
surface temperature
temporal variation
turbulent flow
water vapor
wind speed
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:1 An attenuated eddy covariance (AEC) method is proposed, combining the use of a relatively robust three-dimensional sonic anemometer and a ventilated capacitive hygrometer-thermometer (CHT). The CHT is able to resolve a large enough frequency region of the water vapor density turbulent fluctuations to allow corrections for its limited time response in the inertial subrange of the vertical velocity-humidity cospectrum. This approach is often called the "band-pass covariance method." In the present work we propose a technique in which the covariance between the vertical velocity and water vapor density fluctuations is calculated directly in the time domain (as in the standard eddy covariance technique) and then corrected for the effects of wind velocity and sensor temperature. This technique has been tested with the capacitive sensor "uncapped" and "capped" and in both cases compares well (RMSE less than or equal to 23 W m(-2)) with eddy covariance measurements using fast response hygrometers.
ISSN:0043-1397
1944-7973
DOI:10.1029/2006WR005259