Fluxes of momentum and heat measured at Sevilleta, New Mexico. Technical memo

Technical Report · Thu Feb 01 04:00:00 EST 1996

OSTI ID:229282

Hill, R J; Otto, W D; Sarma, A D; Wilson, J J; Andreas, E L

The flux of sensible heat between the surface and the atmosphere was determined from a variety of different instruments and methods. These instruments were a Bowen ratio station, a three-axis sonic anemometer-thermometer, a single-axis sonic anemometer with a thermocouple, and scintillometers. The methods employed were, respectively, energy balance, eddy correlation, and indirect dissipation. Comparison of the resulting sensible heat fluxes shows that they are in good agreement. Momentum flux is expressed in terms of the friction velocity and was obtained from several of the instruments by different methods. Friction velocity was obtained using eddy correlation of the three-axis sonic anemometer-thermometer data. The surface roughness was obtained from this data by application of Monin-Obukhov similarity theory. Using this roughness length, friction velocity was obtained from wind speed and heat flux measured at the Bowen station by application of Monin-Obukhov similarity. Friction velocity was also obtained from the scintillometer data using the indirect dissipation method, which is an application of Monin-Obukhov similarity.

• Research Organization: National Oceanic and Atmospheric Administration, Boulder, CO (United States). Environmental Technology Lab.
• OSTI ID: 229282
• Report Number(s): PB--96-147756/XAB; NOAA-TM-ERL-ETL--260; CNN: Grant NSF-BSR-8918216
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
ENERGY BALANCE
HEAT FLUX
MOMENTUM TRANSFER
SOILS
TEMPERATURE SURVEYS