A new paper by A. I. Shapiro, W. Schmutz, E. Rozanov, M. Schoell, M. Haberreiter, A. V. Shapiro, and S. Nyeki in Astronomy & Astrophysics – Total Solar Irradiance (TSI) Astronomy & Astrophysics 529, A67 (2011) shows that
a total and spectral solar irradiance was substantially lower during the Maunder minimum than observed today. The difference is remarkably larger than other estimations published in the recent literature. The magnitude of the solar UV variability, which indirectly affects climate is also found to exceed previous estimates.
We present a new technique to reconstruct total and spectral solar irradiance over the Holocene. We obtained a large historical solar forcing between the Maunder minimum and the present, as well as a significant increase in solar irradiance in the first half of the twentieth-century. Our value of the historical solar forcing is remarkably larger than other estimations published in the recent literature.
A recent peer-reviewed paper published in Astronomy & Astrophysics finds that solar activity has increased since the Little Ice Age by far more than previously assumed by the IPCC. The paper finds that the Total Solar Irradiance (TSI) has increased since the end of the Little Ice Age (around 1850) by up to 6 times more than assumed by the IPCC. Thus, much of the global warming observed since 1850 may instead be attributable to the Sun (called “solar forcing”), rather than man-made CO2 as assumed by the IPCC.
Tags: Little Ice Age, Maunder Minimum, solar effects, solar effects on climate, Solar science
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