Sea Ice Albedo
Frozen oceans; Sunlight reflection
Albedo – the fraction of sunlight reflected by a surface.
Bidirectional reflectance distribution function – the angular distribution of light reflected by a surface as a function of sun angle.
Irradiance – sunlight integrated over a hemisphere with units of watts per meter squared.
Leads – areas of open ocean in a sea ice cover.
First year ice – ice that has not yet endured an entire summer melt season.
Multiyear ice – ice that is one or more years old.
The reflection of sunlight from sea ice is of considerable importance for the interpretation of remote sensing imagery and for the large-scale surface heat budget of the ice cover. Light reflection can be characterized by two terms: the albedo and the bidirectional reflectance distribution function (BRDF). These quantities can either be spectral or integrated over the solar spectrum (wavelengths from 280 to 2,500 nm).
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