Psychrometric apparatus for Bowen-ratio determination over forests
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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.
- Black, T. A. and McNaughton, K. G.: 1971, ‘Average Bowen-Ratio Methods of Calculating Evapotranspiration Applied to a Douglas Fir Forest’, Boundary-Layer Meteorol. (in press).
- Fuchs, M. and Tanner, C. B.: 1970, ‘Error Analysis of Bowen Ratios Measured by Differential Psychrometry’, Agr. Meteorol. 7, 329–334.
- Sargeant, D. H.: 1965, ‘Note on the Use of Junction Diodes as Temperature Sensors’, J. Appl. Meteorol. 4, 644–646.
- Sargeant, D. H. and Tanner, C. B.: 1967, ‘A Simple Psychrometric Apparatus for Bowen Ratio Determinations’, J. Appl. Meteorol. 6, 414–418.
- Psychrometric apparatus for Bowen-ratio determination over forests
Volume 2, Issue 2 , pp 246-254
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