Instrumental measurements, proxy data, climate model projections

Climate change is a global phenomenon, affecting weather events around the world.

In October 2003, a little-known think tank in the Department of Defense quietly released a report warning that climate change could happen so suddenly it could pose a major threat to our country's national security. Why was the Pentagon worried about abrupt climate change? Because new evidence from Greenland showed it had happened before. 

Working with private companies, the U.S. Department of Agriculture’s Risk Management Agency uses precipitation data from NOAA’s Climate Prediction Center as part of an insurance program for ranchers and those who grow hay or other livestock forage. This video describes how it works.

ANIMATION: The globally averaged temperature for 2013 tied as the fourth warmest year since record keeping began in 1880, according to NOAA scientists. It was the 37th consecutive year with a global temperature above the 20th-century average. This animation starts with the 2013 difference from average temperature and continues through monthly temperature anomaliies for January-December.

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