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II.—The Cooling of the Soil at Night, with Special Reference to Late Spring Frosts (II)
Published online by Cambridge University Press: 15 September 2014
Extract
In my previous paper to the Society on the same subject I came to the conclusion that the temperature of the surface of open cultivated soil fell rapidly at the beginning of a calm clear night until it was such a number of degrees below the temperature at the 4-in. depth as to make the upward conduction from that depth to the surface balance the radiation. After this stage was reached the surface and 4-in. temperatures fell at the same rate.
If, therefore, the temperatures of the surface and 4-in. depth and the conductivity of the layer of soil between the 4-in. depth and the surface were known from readings of electrical resistance thermometers, and the rate of radiation was calculated from the value of the relative humidity, I suggested that it might be possible to forecast the minimum soil temperature for a calm clear night as early as the previous afternoon.
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- Copyright © Royal Society of Edinburgh 1920
References
page 10 note * The temperatures throughout this paper are in degrees centigrade.
page 21 note * “Frost and Temperature Conditions in the Cranberry Marshes of Wisconsin,” by Cox, H. J., U.S. Department of Agriculture, Weather Bureau, Bulletin T, 1910.Google Scholar