Since the early 1990s, annual atmospheric equivalent black carbon concentrations in the Arctic have decreased at the surface by as much as 55 percent—one of the few "good news" stories coming out of the region.

Since the mid-1960s, the Arctic has warmed about 3.6°F (2.0°C)—more than double the amount of warming in lower latitudes. In 2012 (the last complete calendar year available at the time scientists began working on the 2013 Arctic Report Card), the annual average temperature was the sixth warmest on record.

Last month, three NOAA scientists and a colleague from the United Kingdom Met Office were surprised to learn they'd be rubbing shoulders with leading international thinkers on Foreign Policy magazine's annual list of "Top 100 Global Thinkers."

Models project that extreme dust events combined with global warming could advance the spring thaw in the mountains of the Upper Colorado River Basin by as many as 6 weeks by 2050.  The earlier disappearance of snow could amplify water disputes, extend the fire season, and stress aquatic ecosystems.

Without a strong influence from El Niño or La Niña, the U.S. winter climate is less predictable. Based on recent trends, however, drought is likely to develop in the Southwest and Southeast over the 2013-14 winter.

Traditional weather forecasts consist of weather maps that predict exactly how much rain may fall or the maximum daily temperature of an area. NOAA climate outlooks forecast the odds that future weather conditions will be above, below, or near normal.

The U.S. Drought Portal offers access to maps, data, and expert assessments through easy-to-use tools designed to help decision makers monitor, plan for, and recover from water shortages.

Nearly ten percent of U.S. watersheds are living beyond their means when it comes to their water supply. For nearly half the country, water stress is projected to worsen by mid-century because of climate change, according to a recent NOAA-funded analysis.

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.

Stunned by Sandy's devastation, the city of New York undertook an ambitious project: to update its long-term sustainability plan using the latest climate science. Their goal was to understand how much sea level could rise, how soon, and just how vulnerable the city would be if some of the more extreme climate change projections turn into reality.