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Infrared radiative transfer calculations for volcanic ash clouds
Author(s) -
Prata A. J.
Publication year - 1989
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/gl016i011p01293
Subject(s) - volcanic ash , infrared , radiative transfer , volcano , wavelength , absorption (acoustics) , materials science , atmospheric radiative transfer codes , atmospheric sciences , geology , optics , physics , geochemistry , optoelectronics , composite material
Radiative transfer calculations are performed for volcanic ash clouds assumed to consist of mixtures of ash particles, ice spheres, water droplets and ash particles coated with sulphuric acid. The results show that for nascent volcanic eruption clouds a reverse absorption effect is noticeable in the infrared window between 10µm and 13µm, for which absorption of infrared radiation increases with increasing wavelength. This effect may be of use in detecting hazardous volcanic clouds from space.