Analysis of snow bidirectional reflectance from ARCTAS Spring-2008 Campaign
نویسندگان
چکیده
منابع مشابه
Spectral bidirectional reflectance of Antarctic snow: Measurements and parameterization
[1] The bidirectional reflectance distribution function (BRDF) of snow was measured from a 32-m tower at Dome C, at latitude 75 S on the East Antarctic Plateau. These measurements were made at 96 solar zenith angles between 51 and 87 and cover wavelengths 350–2400 nm, with 3to 30-nm resolution, over the full range of viewing geometry. The BRDF at 900 nm had previously been measured at the South...
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T o t a l hemispherical shortwave reflectance (albedo) is a major parameter of interest for studies of land surface climatology and global change. Efforts' to estimate albedo from remote sensing data have been constrained by the available instrumentation that typically provide observations of reflected radiance from a single view direction in narrow spectral bands'. However, the capability to o...
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Vegetation canopies like most of the natural surfaces reflect the incoming radiation flux in an anisotropic way. Thereby, for an adequate interpretation of the reflectance, we should geometrically characterise the reflecting properties of the surfaces. The basic function that characterises the angular dependence of the reflectance is the Bidirectional Reflectance Distribution Function (BRDF), w...
متن کاملQuantitative Abundance Estimates From Bidirectional Reflectance Measurements
A simplified approach to the problem of determining the relative proportion of minerals in a mixture from a reflectance spectrum of the mixture is presented. Fundamental to this approach is a priori information concerning reflectance spectra of the minerals in the mixture and some estimate of the particle sizes of the mixture components. Reflectance spectra of intimate mixtures are a systematic...
متن کاملAn explanation for the effect of clouds over snow on the topofatmosphere bidirectional reflectance
[1] It has been a long-standing puzzle why clouds, which should interact with solar radiation similarly to a thin layer of snow, have such a dramatic effect on the reflectance observed by satellites over snow-covered regions. The presence of a cloud over the snow strongly enhances the anisotropy of the scene, so that a cloud-over-snow scene appears darker than clear sky over snow when observed ...
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ژورنال
عنوان ژورنال: Atmospheric Chemistry and Physics
سال: 2010
ISSN: 1680-7324
DOI: 10.5194/acp-10-4359-2010