Results 211 to 220 of about 9,395 (253)

A Global Surface Albedo Model

Journal of Applied Meteorology, 1979
Abstract We have shown in the past that the radiative-convective energy balance atmospheric model used at the General Motors Research Laboratories in our atmospheric physics research is extremely sensitive to the input value of surface albedo used. In response to this we developed a new global model of the surface albedo based on a detailed analysis of
John R. Hummel, Ruth A. Reck
openaire   +1 more source

Parameterization of land surface albedo

Chinese Optics Letters, 2014
Remote measurements of Earth's surface from ground, airborne, and spaceborne instruments show that its albedo is highly variable and is sensitive to solar zenith angle (SZA) and atmospheric opacity. Using a vali­dated radiative transfer calculating toolbox, DISORT and a bidirectional reflectance distribution function library, AMBRALS, a land surface ...
Shengcheng Cui Shengcheng Cui, Zhen Wang Zhen Wang, Shizhi Yang Shizhi Yang   +2 more
openaire   +1 more source

Annual Cycle of Surface Albedo

Monthly Weather Review, 1980
Abstract Monthly mean surface albedo for the full spectra range of incoming solar radiation and average atmospheric properties is estimated for the period 1 April 1974–31 March 1975. It can be considered approximately representative of average conditions in the last decade.
G. Kukla, D. Robinson
openaire   +1 more source

REFLECTANCE AND ALBEDO, SURFACE

2003
‘Albedo’ is Latin, meaning whiteness. The albedo of a surface is the fraction of the incident sunlight that the surface reflects. Radiation that is not reflected is absorbed by the surface. The absorbed energy raises the surface temperature, evaporates water, melts and sublimates snow and ice, and energizes the turbulent heat exchange between the ...
openaire   +1 more source

Diurnal asymmetry in surface albedo

Agricultural and Forest Meteorology, 1998
Observed surface albedos do not always exhibit the classical diurnal symmetry associated with the diurnal variation of zenith angle. Morning/afternoon albedo differences observed in even vegetated terrain are found to range on the daily average from 0.01 to 0.05 in magnitude in this study, and they have been found to be as high as 0.1 at a given solar ...
openaire   +1 more source

Albedo distribution on Io's surface

Icarus, 1979
A visual albedo distribution model for all hemispheres of Io's surface has been synthesized from available earth-based and spacecraft image and photometric data. The resulting model indicates some interesting patterns and symmetries on Io's surface: the dark polar caps are shifted off Io's rotational axis and are elliptical rather than circular in ...
D.B. Nash, T.V. Johnson
openaire   +1 more source

The surface Albedo distribution of Pluto

Icarus, 1989
Two distinct configurations have been established for the surface albedo distribution of Pluto on the basis of a model fitting absolute photometry data obtained over the 1954-1986 period. The two sets of model parameters primarily differ in the equatorial spots; these generate the rotational lightcurve, while the polar caps yield the orbital lightcurve.
Marc W. Buie, David J. Tholen
openaire   +1 more source

Surface albedo and the Sahel drought

Nature, 1984
The persistence of the Sahel drought, which reached a peak in 1973, appears to be typical for such dry episodes over past decades and centuries1–3. Such strong persistence can be understood if a strong positive feedback mechanism is operating, partly driven by changes in surface properties4,5.
Courel, Marie-Françoise, Kandel, Robert, Rasool, S., I.   +2 more
openaire   +2 more sources

Surface albedo of cometary nucleus

Advances in Space Research, 1989
Abstract Direct images of the nucleus of comet Halley have revealed an extremely structured and dark surface. This low albedo arises from, at least, two plausible possibilities, i.e. (1) absorption of incident light by non-volatile crust of dark material, and (2) multiple reflection of incident light due to the roughness of the nucleus surface, with ...
Tadashi Mukai, Sonoyo Mukai
openaire   +1 more source

Albedos of natural surfaces in Barbados

Quarterly Journal of the Royal Meteorological Society, 1967
AbstractIn Barbados, albedo values for bare soil surfaces varied according to colour, the moisture condition of the surface layer, the presence of limestone concretions and the roughness of the surface. The albedo of sugar cane increased with crop height until the leaves reached complete cover.
openaire   +1 more source