M. Fligge et al., Variations of solar spectral irradiance from near UV to the infrared - measurements and results, J ATMOS S-P, 63(14), 2001, pp. 1479-1487
Citations number
74
Categorie Soggetti
Earth Sciences
Journal title
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS
Solar spectral irradiance variations are known to exhibit a strong waveleng
th dependence with the amount of variability increasing towards shorter wav
elengths. The bulk of solar radiation is emitted at visible and infrared wa
velengths. Thus, the spectral radiation length of 300 nm accounts for 99% o
f the total solar radiative output. Deposited in the Earth's troposphere an
d biosphere, this part of the solar irradiance spectrum determines direct s
olar radiative forcing and is therefore of particular interest for climate
studies. First, measurements of solar irradiance and irradiance variability
from near UV to the IR are reviewed with particular emphasis on the result
s obtained from the Variability of Irradiance and Gravity Oscillations (VIR
GO) on SOHO and Solar Spectrum Measurement (SOLSPEC) instruments. In the se
cond part a model is presented which describes solar spectral irradiance va
riations in terms of the changing distribution of solar surface magnetic fe
atures. (C) 2001 Elsevier Science Ltd. All rights reserved.