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Albedo and flux extinction coefficient of impure snow for diffuse shortwave radiationImpurities enter a snowpack as a result of fallout of scavenging by falling snow crystals. Albedo and flux extinction coefficient of soot contaminated snowcovers were studied using a two stream approximation of the radiative transfer equation. The effect of soot was calculated by two methods: independent scattering by ice grains and impurities and average refractive index for ice grains. Both methods predict a qualitatively similar effect of soot; the albedo is decreased and the extinction coefficient is increased compared to that for pure snow in the visible region; the infrared properties are largely unaffected. Quantitatively, however, the effect of soot is more pronounced in the average refractive index method. Soot contamination provides a qualitative explanation for several snow observations.
Document ID
19810011004
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Choudhury, B. J.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mo, T.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Wang, J. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Chang, A. T. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
February 1, 1981
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
NASA-TM-82080
Accession Number
81N19531
Funding Number(s)
CONTRACT_GRANT: NAS5-24350
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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