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The energy balance of an evaporation pan and the measurement of the reflectivity of its bottom

✍ Scribed by L. Wartena; A. J. W. Borghorst

Publisher
John Wiley and Sons
Year
1961
Tongue
English
Weight
240 KB
Volume
87
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

A U.S. Weather Bureau Class A evaporation pan was used for micro‐meteorological measurements in Iraq. Because it seemed doubtful if the method of the U.S. Weather Bureau could be used for working up the data in the desert climate of Iraq, the energy balance of the pan was studied, and details are published elsewhere. The considered items are summed up in this contribution and the results are given in Table 1. The problem of the albedo for sunlight of the shallow water in the pan was studied in the laboratory. Measurements were taken with a filtered lightbeam and a silicon photo‐cell. In a zinc pan filled with 0Β·175 m water, 8 per cent of the direct and diffuse sunlight with wavelengths < 1 ΞΌ which has penetrated through the water surface is reflected.

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