October in Alaska this year was more like September, with warmth and rain in place of autumn chill and snow. Wind anomalies related to unusual pressure patterns conspired to bring a steady stream of warm, wet air from southerly latitudes into Alaska.

August 2013 came and went without a single Atlantic hurricane. That's unusual, but by no means unprecedented.

flooded houses on Breezy Point following Hurricane Sandy

Understanding how extreme events in 2012 were influenced—or not—by human-caused climate change

On July 30, 2013, a weather station on the southwest coast of Greenland preliminarily set a new record high temperature for the country, but whether it will stand as an "official" record after scientists apply quality control procedures isn't yet known. What is known? Greenland's getting warmer.

 Since 1976, every year has been warmer than the long-term average, and 2012 continued the trend: the global surface temperature ranked among the top 10 warmest years on record.
 

Global average sea level in 2012 was 1.4 inches above the 1993-2010 average, which was the highest yearly average in the satellite record. Sea level has been rising over the past century, and the pace has increased in recent decades.

Earth's atmosphere includes billions and billions of gallons of evaporated water: i

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