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Thermal radiation in Arctic stratus clouds
Author(s) -
Herman G. F.
Publication year - 1980
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.49710645009
Subject(s) - emissivity , liquid water content , radiative transfer , environmental science , arctic , absorption (acoustics) , atmospheric sciences , radiation , volume (thermodynamics) , wavelength , homogeneous , infrared , meteorology , physics , cloud computing , geology , optics , thermodynamics , oceanography , computer science , operating system
Infrared radiative properties of Arctic stratus clouds in the 10.1 to 12.7μm wavelength region are determined from a series of aircraft measurements. The average emissivity of the clouds when scattering is neglected is unity for cloud depths greater than 350m. Under the assumption that the cloud layers are homogeneous the cloud droplet volume absorption coefficient is estimated as 17±5km −1 . Several mass absorption coefficients are estimated for several assumed liquid water distributions. It is also concluded that the cloud reflectance is not larger than 2(£5%).