climate change

U.S. Bureau of Reclamation

A new study says streamflow in the Colorado River has decreased by about 15 percent in the last century. KNAU’s Melissa Sevigny reports higher temperatures are the primary reason.


U.S. Forest Service Northern Research Station

A study by a Flagstaff scientist found climate change will likely lengthen the growing season in forests—but paradoxically, trees may suffer more from frost. KNAU’s Melissa Sevigny reports.

Courtesy of Rich Hofstetter

Warming temperatures and drought are increasing bark beetle outbreaks worldwide, killing off thousands of miles of forests. The problem is so dire in Russia that foresters have enlisted the help of Flagstaff entomologist and bark beetle expert Rich Hofstetter.


AP Photo/Julie Jacobson, File

Tension over the drought-stressed Colorado River escalated into a public feud when four U.S. states accused Arizona's largest water provider of manipulating supply and demand, potentially threatening millions of people in the United States and Mexico who rely on the river.

Earth Notes: American Pikas

Feb 28, 2018
Dyer Lytle

Hikers in the high mountains of the West have long been charmed by the sight of American pikas peeking out of rocks in talus fields above treeline. 


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