Decision Maker's Toolbox Annual Greenhouse Gas Index

Since 2004, researchers in NOAA’s Global Monitoring Division have released the Annual Greenhouse Gas Index: a single value that compares the total warming effect of each year's concentrations of heat-trapping gases to 1990 levels.

It’s only when we “zoom out” to the planet-wide scale that trends in surface temperature are obvious: despite a few, rare areas experiencing cooling, the vast majority of places across the globe are warming.

Ron Stouffer and Gabriel Vecchi of NOAA’s Geophysical Fluid Dynamics Laboratory in Princeton, N.J., share their experiences working on one of the most comprehensive scientific documents in history.

(video) Chief Meteorologist Jim Gandy, at WLTX in Columbia, SC, earned his reputation as a leading TV meteorologist by giving his viewers what they want: sound science and interesting visuals in a delivery style that's crisp and easy to understand.  Recently, Gandy expanded his reports to include locally focused climate science information on topics that directly touch viewers' lives.  No controversy here, says Gandy, just good community service. 

In early 2011, stratospheric temperatures rose over the tropics due to La Nina while temperatures over the poles fell below the long-term average.

The tornado outbreak across the southern United States in late April 2011 was deadly, devastating, and record breaking. NOAA's "CSI" team is investigating the possible connections between global warming, natural climate patterns, and tornadoes.

The ocean is the largest solar energy collector on Earth. More than 90 percent of the warming that has happened on Earth over the past 50 years has occurred in the ocean. Not all of that heating is detectable at the surface because currents move some of the heat to deeper layers of water, where it can "hide" for years or decades.

Chris Landsea talks about how global warming may change hurricanes: on average, not more storms, but stronger ones.

NOAA's Climate Scene Investigators analyzed why the mid-Atlantic region had record-setting snowstorms this winter. The team looked for but found no human "fingerprints" on the severe weather. Instead, they fingered two naturally occurring climate patterns as co-conspirators in the case.