Were the record rainfall and low temperatures in the U.S. last October related to climate change? Or just an anomaly?



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    Yes, they probably were related to climate change. 2009 saw the wettest October in the U.S. in the entire 115 years of reliable record-keeping. Contrary to the claims of global warming deniers, this trend–cooler temperatures and increased rainfall–is entirely consistent with climate change, and in fact predicted. Part of the reason rainfall increases as a result of climate change is because warmer global temperatures cause greater evaporation of the oceans, which eventually falls back to earth as rain (or snow). Precipitation patterns across the globe have been significantly altered by climate change. The record low temperatures in the U.S. were not matched elsewhere in the world. Nearly everywhere else on the globe October 2009 temperatures were warmer than normal, helping to make 2009 the warmest year on record (as each successive year has been). It’s global trends, not regional ones, that matter where climate change is concerned.

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