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The use of emissivity in atmospheric radiation calculations
Author(s) -
Rodgers C. D.
Publication year - 1967
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.49709339504
Subject(s) - emissivity , radiation , environmental science , flux (metallurgy) , radiation flux , atmospheric sciences , remote sensing , meteorology , computational physics , materials science , physics , optics , geology , metallurgy
The use of emissivity for calculating atmospheric radiation fluxes due to water vapour is investigated with a view to finding the most accurate way of using the approximation. It is shown that with care it is possible to adjust the emissivity so that errors in fluxes of less than 0·05 mW cm −2 are incurred, when compared with calculations using more accurate methods. This can be attained with the aid of a least squares fit of emissivity on calculated flux. ‘Laboratory’ type emissivities give errors of up to 1·3 mW cm −2 .