A comparison of Piché atmometers with conventional estimates of the ventilation term of the Penman model |
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| Authors: | Richard Bello |
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| Institution: | (1) Department of Geography, York University, M3J 1P3 North York, Canada |
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| Abstract: | When shielded from the sun and exposed to the ambient wind regime, Piché atmometers accurately reproduce estimates of the ventilation term of the Penman model using conventional psychrometry and anemometry. Results show that 98% of the variability in conventional estimates are accounted for by the variability in the atmometers when a square-root dependence on wind speed is incorporated into calculations of the evaporative flux from the atmometers. The potential for using a fairly simple instrument for the spatial extension of latent heat flux estimates from freely evaporating surfaces is discussed. |
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