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Politics : View from the Center and Left -- Ignore unavailable to you. Want to Upgrade?

To: Suma who wrote (243254)	1/28/2014 12:59:42 PM
From: Wharf Rat	Read Replies (1) \| Respond to of 541805

"Regarding climate change, he believes both a natural cycle and human-created conditions are separate factors. We're told that greenhouse gases are the cause of the problem, Braden noted, "but a variety of evidence shows otherwise" Total BS. Pay no attention to the man behind the screen. == "the "inconvenient data" from Antarctica ice cores which indicates for the last 800,000 years, temperatures of the Earth rose before greenhouse gases increased" The inconvenient truth is that Gregg just got caught lying. Global warming preceded by increasing carbon dioxide concentrations during the last deglaciation Jeremy D. Shakun, 1, et al Journal name:Nature Volume: 484, Pages:49–54 Date published:(05 April 2012) DOI:doi:10.1038/nature10915 Received 16 September 2011 Accepted 01 February 2012 Published online 04 April 2012 The covariation of carbon dioxide (CO2) concentration and temperature in Antarctic ice-core records suggests a close link between CO2 and climate during the Pleistocene ice ages. The role and relative importance of CO2 in producing these climate changes remains unclear, however, in part because the ice-core deuterium record reflects local rather than global temperature. Here we construct a record of global surface temperature from 80 proxy records and show that temperature is correlated with and generally lags CO2 during the last (that is, the most recent) deglaciation. Differences between the respective temperature changes of the Northern Hemisphere and Southern Hemisphere parallel variations in the strength of the Atlantic meridional overturning circulation recorded in marine sediments. These observations, together with transient global climate model simulations, support the conclusion that an antiphased hemispheric temperature response to ocean circulation changes superimposed on globally in-phase warming driven by increasing CO2 concentrations is an explanation for much of the temperature change at the end of the most recent ice age. nature.com CO2 went up by 80 PPM in 7000 years. We've pushed it up 100 ppm in about 100 years