Monday, February 13, 2012

Fierce Winter Devastates Parts Of Europe : NPR
Parts of Europe are experiencing the fiercest winter weather in almost 30 years. More cold and snow struck over the weekend wreaking havoc from Italy to Ukraine. Hundreds of people, many of them homeless, have died in subzero temperatures in the last week across eastern Europe. NPR's Eric Westervelt has more.
A super-sized Sun could explain why Earth didn't freeze to death long ago
The most common way to account for this apparent paradox is that the Earth simply held onto a lot more heat back then, most likely due to a runaway greenhouse effect. The absence of bacteria would have meant there was nothing around to break down carbon dioxide into its constituent parts, which would have helped fuel this greenhouse effect.
The problem, as Astrobiology Magazine reports, is that the geological record doesn't really support the carbon dioxide hypothesis.
Berkeley church holds preach-in on global warming | Berkeleyside
On Sunday, Berkeley’s St. Mark’s Episcopal Church took part in a national preach-in on global warming which linked hundreds of congregations across the country together as they reflected on their responsibility towards the planet and social action.
Magic School Bus educates, excites Loeb Playhouse - Purdue Exponent: Features: magic school bus, loeb playhouse, global warming,
Throughout the performance the cast presented key points of information on global warming in a variety of different ways. Dance and song were frequently utilized as well as the use of props. In one instance, the cast twirled orange ribbons to represent sun beams while the remaining cast members inflated then deflated a cream colored parachute to represent greenhouse gases.
Patrick Mangan, a sophomore in the College of Agriculture, found the cast’s metaphorical explanation of global warming’s effect upon the Earth to be particularly successful.
“They were able to relate the Earth’s temperature rising by one degree to a fever,” Mangan said. “A fever is an accurate analogy that everyone could easily understand.”
The show concluded with the cast getting the audience involved by having them chant, “Go green. Reduce, reuse, recycle, rethink,” before they bowed, jumped off the stage and ran to the lobby to greet everyone.

1 comment:

Robert Austin said...

Regarding the faint early sun paradox, one does not need a high concentration of greenhouse gases to compensation for less TSI. A denser atmosphere of mostly non radiative gases will suffice. With the radiative cooling proportional to the forth power of T, it does not take a great increase in atmospheric density to compensate for the lower TSI. I am not a physicist so I do not stand behind my back of envelope calcs, but I come out with a 50% increase in atmospheric mass to compensate for a TSI that is 70% of the present TSI. Extra greenhouse gases are not required beyond contributing to the atmospheric mass.