Comparison of Radiation Computations Using Observed and Estimated Precipitable Water

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  • 1 The Center for the Environment and Man, Inc., Hartford, Conn. 06120
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Abstract

Hourly values of total solar radiation are computed by two methods at 11 stations in all regions of the United States for a two-year period. In the first method, precipitable water is computed from radiosonde observations while in the second method it is estimated from surface dew point. Annual differences were 1% or less at 10 of the 11 stations and less than 2% at all stations for both years. Differences in individual months were also less than 2% at all stations with few exceptions.

Abstract

Hourly values of total solar radiation are computed by two methods at 11 stations in all regions of the United States for a two-year period. In the first method, precipitable water is computed from radiosonde observations while in the second method it is estimated from surface dew point. Annual differences were 1% or less at 10 of the 11 stations and less than 2% at all stations for both years. Differences in individual months were also less than 2% at all stations with few exceptions.

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