Premium
Impact of new measurements of oxygen collision‐induced absorption on estimates of short‐wave atmospheric absorption
Author(s) -
Chagas J. C. S.,
Newnham D. A.,
Smith K. M.,
Shine K. P.
Publication year - 2002
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 - 10.1256/qj.01.159
Subject(s) - absorption (acoustics) , oxygen , atmospheric sciences , environmental science , sky , ozone , atmosphere (unit) , latitude , water vapor , nitrogen , analytical chemistry (journal) , materials science , meteorology , chemistry , physics , optics , environmental chemistry , organic chemistry , astronomy
A new set of laboratory measurements of the 1.06 µm and 1.27 µm collision‐induced bands of gaseous oxygen is presented. Absorption by pure oxygen and mixtures of oxygen with nitrogen and argon was observed using a Fourier transform spectrometer for temperatures between 230 and 295 K and pressures between 1 and 5 bar. Binary cross‐sections derived from the measurements were used to estimate the impacts on estimates of clear‐sky climatological absorption of solar irradiance. Monthly climatological atmospheric profiles averaged over 10 ° latitude belts were used to study the temporal and annual variation of the impacts. The global‐ and annual‐mean clear‐sky extra‐absorption was 0.58 W m −2 (about 1% of the absorption by water vapour and ozone), 0.42 W m −2 due to the 1.27 µm band and 0.16 W m −2 due to the 1.06 µm band. If estimates for other oxygen collision‐induced bands taken from previous studies are added, an overall impact of about 1 W m −2 results. Copyright © 2002 Royal Meteorological Society