Psychrometric apparatus for Bowen-ratio determination over forests |
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Authors: | T A Black K G McNaughton |
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Institution: | (1) Department of Soil Science, University of British Columbia, Vancouver, Canada |
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Abstract: | The psychrometric apparatus design for Bowen ratio determination reported previously by Sargeant and Tanner was modified and a new apparatus built. Modification of the intake design improved the symmetry and rigidity of the sensor mounting. Wet- and dry-bulb differences were measured with an error less than 0.01 °C over a vertical distance of 1 m. Continuous measurements of the Bowen ratio over a 7.8-m Douglas fir forest were made for 6 weeks. An example of the energy balance for the forest for one day using this equipment is reported. |
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