(PhysOrg.com) -- A new NASA study underscores the fact that greenhouse gases generated by human activity -- not changes in solar activity -- are the primary force driving global warming.
Earth Sciences
Jan 30, 2012
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Sunspots have been observed for about four centuries, since they were first reported by Galileo. Appearing in roughly eleven-year cycles of activity, sunspots are regions of strong and complex magnetic fields which are also ...
Space Exploration
Apr 5, 2011
6
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Scientists have taken a major step toward accurately determining the amount of energy that the sun provides to Earth, and how variations in that energy may contribute to climate change.
Earth Sciences
Jan 14, 2011
72
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(PhysOrg.com) -- A scientist at the Argonne National Laboratory has created visible-light catalysis, using silver chloride nanowires decorated with gold nanoparticles, that may decompose organic molecules in polluted water.
Nanophysics
Jun 15, 2010
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California's goal of generating 33 percent of its power from renewable energy sources by 2020 will be challenging on days when clouds shade acres of solar photovoltaic panels or when thousands of wind turbines spin more slowly ...
Energy & Green Tech
Mar 16, 2010
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(PhysOrg.com) -- A new system from an Italian company uses weather satellite data to estimate the potential of solar cell power plants and monitor their performance. The approach helps to give a faster return on investments ...
Energy & Green Tech
Oct 16, 2009
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(PhysOrg.com) -- During the Maunder Minimum, a period of diminished solar activity between 1645 and 1715, sunspots were rare on the face of the sun, sometimes disappearing entirely for months to years. At the same time, Earth ...
Space Exploration
Mar 23, 2009
3
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(PhysOrg.com) -- Climatologists at the NASA Goddard Institute for Space Studies (GISS) in New York City have found that 2008 was the coolest year since 2000. The GISS analysis also showed that 2008 is the ninth warmest year ...
Environment
Feb 23, 2009
14
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