The ratio of reflected flux density to incident flux density, referenced to some surface.
A general term referring to the radiation reflected from, or scattered back through, a given surface in response to radiation incident on the surface with the same wavelength or wavelength range.
A thermodynamic function of state; the value of the mixing ratio of saturated air at the given temperature and pressure.
1. Generally, some measure of the water vapor content of air. The multiplicity of humidity measures is partly due to different methods of measurement and partly because the conservative measures (mixing ratio, specific humidity) cover an extremely wide dynamic range, as a result of the rapid variation of saturation vapor pressure with temperature. 2. Popularly, same as relative humidity.
In a system of moist air, the (dimensionless) ratio of the mass of water vapor to the total mass of the system.