CNS News 
Wednesday, Aug 27, 2008
New scientific evidence suggests there is a stronger link between solar activity and climate trends on Earth than there is with greenhouse gases, Fred Singer, an atmospheric and space physicist, told CNSNews.com.
The new data call into question whether scientific evidence shows that global warming is a man-made phenomenon and suggests that natural forces, as opposed to human activity, may drive global climate change.
Singer is one of many scientists who say recent scientific observations have determined that “solar variability” – or fluctuations in the sun’s radiation – directly affects climate change on Earth.
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“In the broad sense, the Earth’s climate is determined by solar radiation,” Singer said. “If the radiation changes, so will the general climate.”
Singer said scientists have long theorized that changes in the sun’s activity also impact the amount of cosmic rays reaching the earth – affecting the Earth’s cloudiness and thereby the climate.
Cosmic rays are high energy particles of extraterrestrial origin that collide at almost the speed of light with atoms in the upper atmosphere of the earth.
The hypothesis is underpinned by the idea that variations in the sun’s irradiance – electromagnetic energy emitted by the sun that reaches earth’s surface – translate into climate changes on Earth in two key ways: 1) cosmic rays create either more or fewer low, cooling clouds in our planet’s atmosphere; and 2) ozone changes driven by solar activity in the stratosphere create varying degrees of heating in the lower atmosphere.