 Originally posted by jaaaman: Quote: Nasa on Global Warming: It's the Sun.
NASA News Archive
A new NASA study has found that an important counter-balance to the warming of our planet by greenhouse gases – sunlight blocked by dust, pollution and other aerosol particles – appears to have lost ground.
The thinning of Earth’s “sunscreen” of aerosols since the early 1990s could have given an extra push to the rise in global surface temperatures. The finding, published in the March 16 issue of Science, may lead to an improved understanding of recent climate change. In a related study published last week, scientists found that the opposing forces of global warming and the cooling from aerosol-induced "global dimming" can occur at the same time.
"When more sunlight can get through the atmosphere and warm Earth's surface, you're going to have an effect on climate and temperature," said lead author Michael Mishchenko of NASA's Goddard Institute for Space Studies (GISS), New York. "Knowing what aerosols are doing globally gives us an important missing piece of the big picture of the forces at work on climate." | I happen to agree with NASA. . . when global warming happens on planets like Mars (for instance), we concede it to be the sun's activities. However, when it happens on this planet, we blame it on environmental factors. . . go figure.
Anyway, (I'm not sure of the exact numbers or dates) the temperature of the Earth has warmed up only about 1 degree in the last 250 years or so. . . that hardly sounds like a case for "global warming" due to environmental pollution.   Be still, and know that Dog I am.
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