Ice Cores & Greenhouse Gases

Potsdam Institute for Climate Impact Research
Lead author: Thomas Schneider
Where published: Climate Dynamics

Ice Age evidence confirms that a doubling of greenhouse gases could drive up world temperatures by about 3 Celsius (5.4 Fahrenheit), causing havoc with the climate, a study showed on Friday.

The researchers made a novel check of computer climate forecasts about the modern impact of heat-trapping gases, widely blamed on use of fossil fuels, against ice cores and marine sediments from the last Ice Age which ended 10,000 years ago.
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Sunspots Non Impact

Heliophysics, Max Planck Institute for Astrophysics
Lead author: Peter Foukal
Where published: Nature

Sunspots alter the amount of energy Earth gets from the sun, but not enough to impact global climate change ... The difference in brightness between the high point of a sunspot cycle and its low point is less than 0.1 percent of the sun's total output ... If you run that back in time to the 17th century using sunspot records, you'll find that this amplitude variance is negligible for climate.

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Siberian Lakes Bubbling Methane

University of Alaska
Lead author: Katey Walter
Where published: Nature

Global warming is causing Siberian lakes to bubble methane, a greenhouse gas, into the atmosphere at an alarming rate, scientists say. Because methane in the atmosphere warms the planet, the Russian pools are intensifying the climate change that boosted their belching in the first place. It all adds up to a feedback loop in which warming begets even more warming.
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