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Polar Vortex Spiked U.S. CO2 Emissions in 2013

The polar vortex spurred a spike in CO2 emissions in 2013 as people cranked up their heat last winter.

Zombie Glacier Surprises Scientists

Discovery of a semi-lifeless glacier in southeastern Iceland creates a new zombie class of frozen rivers of water.

6 Degrees: Security Risks, Tornadoes and Earthquakes

A new climate report from the Pentagon, tornado trends, earthquakes and more in this week's top climate news.

Jack Frost Not Exactly Nipping at Your Nose

The frost-free season is growing longer across the U.S. overall. Check the trend in your city.

Expanding Antarctic Sea Ice is Flooding ‘Warning Bell’

Expansion of Antarctic sea ice heralds ocean changes that could trap heat and accelerate ice sheet melting.

Antarctic Sea Ice Officially Hits New Record Maximum

For the third year in a row, Antarctic sea ice has hit a record maximum winter extent.

Drought Drains Already Diminished Aral Sea

A lobe of the ailing Aral Sea, once the fourth largest lake in the world, has dried up for the first time.

Greenland Sediment Sheds Light on Sea Level Rise

Sediment flowing off Greenland's ice sheet could hold clues about current and future sea level rise.

Antarctic Sea Ice Hits New Max; Continent Still Warming

The sea ice that rings Antarctica is headed for another record winter maximum.

A Timeline of 2013 Extreme Weather and Global Warming

Take an interactive look at extreme weather events in 2013 and the role global warming did (or didn't) play.

Gravity Shift Reveals West Antarctic Ice Loss

A new European Space Agency animation shows recent ice loss in Antarctic in new detail.

Arctic Sea Ice to Reach Sixth Lowest Extent on Record

Arctic sea ice is set to reach the sixth lowest extent on record at the end of the summer melt season.

September Arctic Sea Ice

2014's Arctic sea ice minimum isn’t going to be as low as the record set in 2012, but it will be well below the 1981-2010 average.

Antarctic Ice: What’s Going On

September marks the end of winter when the sea ice that surrounds Antarctica swells to its maximum extent.

Warming Air Was Trigger for Antarctic Ice Shelf Collapse

The spectacular 2002 collapse of Antarctica's Larsen B ice shelf was caused by surface melting.

The Good and Bad Climate News from Permafrost Melt

Nearly half of the carbon that's eroding from melting Arctic permafrost is ending up in the atmosphere.

NASA Releases Blizzard of Precipitation Data

The most comprehensive set of precipitation data collected by NASA is now available to the public.

What Global Warming Might Mean for Extreme Snowfalls

While warming is expected to reduce average snowfalls, it may have less of an impact on extreme snowfalls.

Antarctic Riddle: How Much Will the South Pole Melt?

Improved climate models suggests melting in Antarctica will be worse this century than we had realized.

What Iceland’s Volcanoes Can Teach Us about Climate

Another Icelandic volcano is primed to erupt and events like that have a lot teach us about climate change.

Gallery

Washington, DC: July Days Over 90 Degrees By mid-century in Washington, DC, the the sweltering heat of July 2010 may be thought of as cooler-than-average conditions