Three ways of dusting for climate fingerprints.

When weather disasters happen, is climate change to blame? The stories, video, and interactives in "Weather on Steroids" explore that question from a number of angles. It turns out that blaming climate change for wild weather's not that simple. Here’s why.

A new computer modeling study from NCAR investigates how an increase in shrubs in the Arctic may affect permafrost. Over the past few decades, a warming climate has meant that the Arctic’s grassy tundra is being increasingly overtaken by shrubs.

Volcanic eruptions and resulting changes to sea ice and ocean currents may be the cause.

NCAR scientist Jerry Meehl explains the connection in this animated video.