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Politics : The Environmentalist Thread

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To: Nadine Carroll who wrote (10600)	3/19/2007 5:00:29 PM
From: Wharf Rat	Read Replies (2) of 36921

"Climate modelling, like any other kind, needs to be verified against empirical observation," Dr. James Hurrell, Director of the Climate and Global Dynamics Division of the National Center for Atmospheric Research, explained that if you took today’s models, and ran them without the “anthropogenic forcings” (i.e., the extra CO2 and other greenhouse gases released by human activities), the models no longer explained the changes in the climate since the start of the Industrial Revolution. Natural changes, like variations in sunspot activity, were not sufficient to explain the planet’s rising temperatures. Only when human activities are added in do the models produce results that agree with today’s temperature measurements. Message 23367522

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