Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.4377f&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 23, p. 4377-4380
Astronomy and Astrophysics
Astrophysics
196
Global Change: Solar Variability, Solar Physics, Astrophysics, And Astronomy: Solar Irradiance, Solar Physics, Astrophysics, And Astronomy: Photosphere
Scientific paper
A composite record of the Sun's total irradiance compiled from measurements made by five independent space-based radiometers since 1978 exhibits a prominent 11-year cycle with similar levels during 1986 and 1996, the two most recent minimum epochs of solar activity. This finding contradicts recent assertions of a 0.04% irradiance increase from the 1986 to 1996 solar minima and suggests that solar radiative output trends contributed little of the 0.2°C increase in the global mean surface temperature in the past decade. Nor does our 18-year composite irradiance record support a recent upward irradiance trend inferred from solar cycle length, a parameter used to imply a close linkage in the present century between solar variability and climate change.
FrÖhlich Claus
Lean Judith
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