I'm sure I mentioned it somewhere around here. The sun isn't putting out any more or less sunlight than usual. It has 11 year cycles where the sun's output fluctuates a little. But not enough to cause HUMAN caused global warming.
Nicola Scafetta, Professor of Oceanography and Atmospheric Physics at the University of Naples Federico II (Italy): “The possible contribution of the sun to the 20th-century global warming greatly depends on the specific solar and climatic records that are adopted for the analysis.
The issue is crucial because the current claim of the IPCC that the sun has had a negligible effect on the post-industrial climate warming is only based on global circulation model predictions that are compared against climatic records, which are likely affected by non-climatic warming biases (such as those related to the urbanization), and that are produced using solar forcing functions, which are obtained with total solar irradiance records that present the smallest secular variability (while ignoring the solar studies pointing to a much larger solar variability that show also a different modulation that better correlates with the climatic ones). The consequence of such an approach is that the natural component of climate change is minimized, while the anthropogenic one is maximized. Both solar and climate scientists will find the RAA study useful and timely, as it highlights and addresses this very issue.”
Gregory Henry, Senior Research Scientist in Astronomy, from Tennessee State University’s Center of Excellence in Information Systems (U.S.A.):
“During the past three decades, I have acquired highly precise measurements of brightness changes in over 300 Sun-like stars with a fleet of robotic telescopes developed for this purpose. The data show that, as Sun-like stars age, their rotation slows, and thus their magnetic activity and brightness variability decrease. Stars similar in age and mass to our Sun show brightness changes comparable to the Sun’s and would be expected to affect climate change in their own planetary systems.”
Valery M. Fedorov, at the Faculty of Geography in Lomonosov Moscow State University, Russia:
“The study of global climate change critically needs an analytical review of scientific studies of solar radiation variations associated with the Earth's orbital motion that could help to determine the role and contributions of solar radiation variations of different physical natures to long-term climate changes. This paper steers the scientific priority in the right direction.”
Richard C. Willson, Principal Investigator in charge of NASA’s ACRIM series of Sun-monitoring Total Solar Irradiance satellite experiments (U.S.A.):
“Contrary to the findings of the IPCC, scientific observations in recent decades have demonstrated that there is no ‘climate change crisis’. The concept that’s devolved into the failed CO2 anthropogenic global warming (CAGW) hypothesis is based on the flawed predictions of imprecise 1980’s vintage global circulation models that have failed to match observational data both since and prior to their fabrication. The Earth’s climate is determined primarily by the radiation it receives from the Sun. The amount of solar radiation the Earth receives has natural variabilities caused by both variations in the intrinsic amount of radiation emitted by the Sun and by variations in the Earth-Sun geometry caused by planetary rotational and orbital variations. Together these natural variations cause the Total Solar Irradiance (TSI) at the Earth to vary cyclically on a number of known periodicities that are synchronized with known past climatic changes.”
Hong Yan (晏宏), Professor of Geology and Paleoclimatology at the Institute of Earth Environment and Vice Director of the State Key Laboratory of Loess and Quaternary Geology in Xi’an, China:
“Paleoclimate evidence has long been informing us of the large natural variations of local, regional and hemispheric climate on decadal, multidecadal to centennial timescales. This paper will be a great scientific guide on how we can study the broad topic of natural climatic changes from the unique perspective of external forcings by the Sun’s multi-scale and multi-wavelength impacts and responses.”
Ana G. Elias, Director of the Laboratorio de Ionosfera, Atmósfera Neutra y Magnetosfera (LIANM) at the Facultad de Ciencias Exactas y Tecnología in the Universidad Nacional de Tucumán (FACET-UNT), Argentina:
“The importance of this work lies in presenting a broader perspective, showing that all the relevant long-term trend climate variability forcings, and not just the anthropogenic ones (as has been done mostly), must be considered. The way in which the role of these forcings is estimated, such as the case of solar and geomagnetic activity, is also important, without minimizing any one in pursuit of another. Even the Earth’s magnetic field could play a role in climate.”
Willie Soon, at the Center for Environmental Research and Earth Sciences (CERES), who also has been researching sun/climate relationships at the Harvard-Smithsonian Center for Astrophysics (U.S.A.) since 1991:
“We know that the Sun is the primary source of energy for the Earth’s atmosphere. So, it always was an obvious potential contributor to recent climate change. My own research over the last 31 years into the behavior of stars that are similar to our Sun, shows that solar variability is the norm, not the exception. For this reason, the Sun’s role in recent climate change should never have been as systematically undermined as it was by the IPCC’s reports. Hopefully, this systematic review of the many unresolved and ongoing challenges and complexities of Sun/climate relationships can help the scientific community return to a more comprehensive and realistic approach to understanding climate change.”
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