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Temperature‐ and composition‐dependent infrared optical constants for sulfuric acid
Author(s) -
Niedziela R. F.,
Norman M. L.,
Miller R. E.,
Worsnop D. R.
Publication year - 1998
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1998gl900202
Subject(s) - sulfuric acid , extinction (optical mineralogy) , sulfate , infrared , refractive index , chemical composition , atmosphere (unit) , ion , infrared spectroscopy , composition (language) , materials science , range (aeronautics) , analytical chemistry (journal) , mineralogy , inorganic chemistry , chemistry , environmental chemistry , optics , thermodynamics , physics , optoelectronics , organic chemistry , linguistics , philosophy , metallurgy , composite material
Complex refractive indices have been retrieved directly from the FT‐IR extinction spectra of laboratory‐generated, binary sulfuric acid/water aerosols over a range of temperatures and compositions relevant to the atmosphere of Earth. The refractive indices are strongly dependent upon both temperature and composition, due to changes in the equilibrium between sulfate and bisulfate ions and the resultant change in the corresponding solvation interactions. The present results have important implications for determining the composition of sulfuric acid aerosols by remote sensing applications.