β Scribed by Stanton E. Tuller; Rodney Chilton
No coin nor oath required. For personal study only.
This study investigates the role of dew in the moisture balance of a summer-dry climate. Dew was measured by means of the optical technique employing Duvdevani dew blocks during three summer months and one fall month in 1970. Results were compared with rainfall and potential evapotranspiration Dew amounted to 12-14% of normal monthly rainfall in mid-summer. In the unusually dry year of 1970 it reached 154% of the rainfall in August. Dew was seen to increase with the number of clear nights and, thus, increased as clouds and precipitation decreased. Although dew was an available source of evaporative moisture until approximately 09h30 on the morning after a clear night, its total was only about 2% of monthly potential evapotranspiration. The amount of dew increased outward from a vertical forest edge as longwave cooling and wind effects increased.
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