Parameter Tree:
EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ACTIVITY > SOLAR IRRADIANCE

Definition:
Solar irradiance at the top of the atmosphere on a plane normal to the
incident¿radiation, and at the mean distance of the Earth from the Sun. Solar
irradiance¿is also referred to as the solar constant. In satellite remote
sensing, the¿solar irradiance is used as an onboard calibration of visible band
sensors.¿Some climate studies suggest that small variations in the solar
irradiance¿associated with solar activity over days to decades may have an
effect the¿Earth's climate.¿
The intensity of the sun's radiation at different wavelengths. The radiation is
generally given in terms of solar constant \ S, defined in terms of flux of
total radiation received outside the earth's atmosphere per unit area at mean
sun earth distance., and has the value S = 1.34 X 10*6 ergs cm*-2 sec*-1.


Reference:
Maunder, W.J. 1994. Dictionary of Global Climate Change, 2nd. ed. Chapman and
Hall, NY. Carleton, A.M. Satellite Remote Sensing in Climatology, Belhaven
Press, London, UK.
Solar Activity, Einar Tandberg-Hanssen, Blaisdale Publishing Co. Waltham, MA,
1967.