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The influence of cloud on hourly amounts of total solar radiation at the sea surface
Author(s) -
Lumb F. E.
Publication year - 1964
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49709038305
Subject(s) - latitude , environmental science , radiation , atmospheric sciences , atmosphere (unit) , meteorology , altitude (triangle) , climatology , physics , geology , astronomy , mathematics , optics , geometry
Empirical relations are found for the hourly short‐wave radiation Q received on a horizontal surface at ocean weather station Juliett (52° 30'N, 20°W), for nine categories of cloud, in the form Q = 135 fs (mw hr cm −2 ) where f = a + b s is the fraction of solar radiation transmitted through the atmosphere, s is the mean of the sines of the solar altitude at the beginning and end of the hour, and a , b are constants. A comparison with a similar analysis of radiation data at station Alfa indicates that the relationships derived for Juliett are valid over a wide band of latitude, and it is shown that they can be used to estimate (within ϕ 10 per cent on most occasions) the total solar radiation received at the sea surface during 5‐day periods over the North Atlantic between 45° and 65°N.