HR: 0800h
AN: A51A-0743    [Abstracts]
TI: MEASUREMENT OF HEAT, MOISTURE AND MOMENTUM FLUXES USING FLUX \- GRADIENT METHOD AND BOWEN \- RATIO METHOD.
AU: * AREGBESOLA, T O
EM: bledora@yahoo.com or bledore@oauife.edu.ng
AF: INSTITUTE OF EDUCATION,, OBAFEMI AWOLOWO UNIVERSITY,, ILE-IFE, OSU 22005 Nigeria
AB: Using a set of data from Nigeria Micrometeorological Experiment \(NIMEX\-\1\) recently conducted between 15th February and 10th March, 2004 at a tropical field site in Ile\-\Ife \(7.55o N, 4.56o E\), in the south-western Nigeria, Bowen Ratio and Flux\-\Gradient methods were used to calculate heat, moisture and momentum turbulent fluxes in the surface layer. The profile measurements of temperature, moisture and wind up to 15metres height using sensitive instruments such as cup anemometers, Frankenberger\-\type psychrometers and a windvane were sampled at every second and stored as 1 minute averages. The turbulent fluxes of heat, moisture and momentum were measured directly using eddy covariance system consisting of an ultrasonic anemometer and a krypton hygrometer \(sampled at 16Hz and 8 Hz respectively\) . The results obtained using the two methods mentioned above showed good agreement in the turbulent fluxes measured. There was also no significant difference when compared with the turbulent fluxes obtained from the ultrasonic and krypton hygrometer results.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0342 Middle atmosphere--energy deposition
DE: 0360 Transmission and scattering of radiation
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting