Surface renewal analysis for sensible and latent heat flux density |
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| Authors: | R L Snyder D Spano K T Pawu |
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| Institution: | (1) University of California, Atmospheric Science, 95616 Davis, CA, USA;(2) Università di Sassari, Istituto Coltivazioni Arboree, Facolta' di Agraria, 07100 Sassari, Italy;(3) University of California, Atmospheric Science, 95616 Davis, CA, USA |
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| Abstract: | High frequency temperature measurements were recorded at five heights and surface renewal (SR) analysis was used to estimate sensible heat flux density (H) over 0.1 m tall grass. Traces of the temperature data showed ramp-like structures, and the mean amplitude and duration of these ramps were used to calculate H using structure functions. Data were compared with H values measured with a sonic anemometer. Latent heat flux density ( E) was calculated using an energy balance and the results were compared with E computed from the sonic anemometer data. SR analysis provided good estimates of H for data recorded at all heights but the canopy top and at the highest measurement level, which was above the fully adjusted boundary layer. |
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| Keywords: | Surface renewal coherent structures temperature ramps sensible heat flux density latent heat flux density |
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