Welcome detectives! Scientists around the world are working to piece together the evidence, impacts, and projections of global warming. Temperatures are projected to rise around the globe over the next century and already things like ice-melt in the Arctic have captured headlines. But what is happening on the ground in our local area?

Your assignment is to investigate the evidence for climate change in Arizona. That's a tall order, so we'll follow our first lead in the case: winter temperatures. There are clues that the coldest temperatures may be getting less cold—more rapidly than summertime highs. Use the following links to get started on your case:

Organize Your Case File - Start here to learn how to navigate the evidence and make your case notes

Examine the Evidence - Learn more about the types of evidence available and compare data from different sites

Visit the Scene - Access the range of evidence for specific locations in Arizona

Interview the Suspects - Meet the major players that influence the climate of the Southwest

Review Your Case - After you finish making notes review your evidence and analyze the case

Sentencing - The potential impacts of winter warming in Arizona

The Fine Print - Where to go for all the nitty-gritty data details

Credits - References and information about the site