climate change

Hestia / Gurney Lab

This week scientists at Northern Arizona University published the first-ever map of a megacity’s carbon emissions down to the scale of specific roads and buildings. The animation shows the Los Angeles urban area as carbon emissions rise and ebb over the course of the day. KNAU’s Melissa Sevigny spoke with climate scientist Kevin Gurney about how this data can guide policy decisions about climate change.

Courtesy of Ted Schuur

New research conducted by Northern Arizona University in Alaska shows melting permafrost may be releasing a lot more carbon into the atmosphere than scientists previously thought. KNAU’s Melissa Sevigny reports.

Harun Mehmedinović

HBO’s latest documentary, “Ice on Fire,” produced by Leonardo DiCaprio portrays the global threat of climate change, but also presents several cutting-edge options for halting and even reversing it. The coproducer and cinematographer on the project is Bosnian-born Harun Mehmedinović a professor at Northern Arizona University. He’s has built a career on chronicling the natural world. Mehmedinović spoke with KNAU’s Ryan Heinsius about the film and the imminent threat of climate change.

(AP Photo/Eric Risberg, File)

Climate change in the Western U.S. means more intense and frequent wildfires churning out waves of smoke that scientists say will sweep across the continent to affect tens of millions of people and cause a spike in premature deaths.

KNAU/Ryan Heinsius

This week, we begin a series of interviews called Bearing Witness: Voices of Climate Change. They're stories told by longtime Arizonans about changes they've seen in the familiar landscapes of their lives: Watering holes gone dry, food sources vanished, tribal customs changed because of drought. Personal experience, in and of itself itself, is not scientific conclusion. But, many researchers believe long-term observation is a critical component to understanding how climate change affects humanity and the planet. In this segment, we hear from lifelong Flagstaff resident, Jim Babbitt. His family came to the area in the late 1800's when the population was only about 600. They bought ranch land and cattle to graze it, and over the next 100-plus years, became a ranching dynasty, as well as a family of conservationists and stewards of the West. Here, Jim Babbitt remembers local watering holes and streams in Flagstaff that aren't what they used to be, including the Frances Short Pond. It was created by the Arizona Railway as a storage reservoir.