A rare confluence of three atmospheric patterns drove so much precipitation over Australia in 2010 and 2011 that the world’s ocean levels dropped measurably.

Scientists are zeroing in on microbes that eat carbon in the soil and release it back to the atmosphere, thereby influencing global climate.

Levels of carbon dioxide in the atmosphere are fluctuating more than they used to from one season to another, according to observations from the HIPPO field project. This may be a sign of significant changes in northern ecosystems.

Drier ski slopes, reduced river flows, and increased wildfires can potentially discourage tourists from coming to Colorado. Should local officials and business leaders do more to plan for these impacts?

Carbon dioxide concentrations in the atmosphere have crossed a major threshold: 400 parts per million. Here are five key points on how carbon dioxide is affecting Earth’s atmosphere and the role we're playing in it.