March 20, 2017

Based on historical climate data from thousands of stations across the United States, these maps show the warmest and coldest daytime high temperatures ever recorded at a given location on March 20—the astronomical first day of spring.

December 15, 2016

A Q & A about the science of detecting the influence of global warming on hurricanes, fires, and other extreme events.

December 13, 2016

A new NOAA-sponsored report shows that unprecedented warming air temperature in 2016 triggered massive declines in sea ice and snow cover across the  Arctic, and brought a record-breaking delay to fall sea ice freeze up. Learn more through our image highlights of the 2016 Arctic Report Card.

October 12, 2016

The ozone hole didn't cause global warming, but climate and the ozone hole are related in other ways.

August 2, 2016

A record-smashing hurricane season in the central North Pacific. Water rationing in Puerto Rico. The biggest one-year jump in atmospheric carbon dioxide concentrations. These and more of 2015's extreme events had one thing in common: El Niño.

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