Earth Notes

Wednesdays at 7:30 a.m. and 5:32 p.m. and Saturdays at 9:34 a.m.
  • Hosted by Tristan Clum

The Colorado Plateau is one of North America’s human and environmental treasures. Ancient cultures have called this land of sun-baked deserts and lush mountain landscapes home for centuries. Earth Notes, KNAU’s weekly environmental series, explores the Plateau by telling stories of the intricate relationships between environmental issues and our daily lives.

Rooted in science and wrapped in human interest, the two minute long segments encourage listeners to think of themselves as part of the solution to environmental problems. Upbeat and informative, the program tries to foster hope and dampen despair about the environment, and motivate listeners to become more conscious and informed stewards of the Colorado Plateau.

Brocken Imaglory

Southwest deserts are a good place to see atmospheric phenomena called mirages. They occur where distinct layers of warm and cooler air form. When hot air is trapped below cooler air, entering light is inverted and bent upwards – forming an inferior mirage below the real object.


Louis Vest

The iconic formation called Ship Rock sails like a stately clipper ship 1,700 feet above the surrounding desert of northwest New Mexico.  It’s the craggy remnant of a volcanic explosion that occurred about 30 million years ago, with long dikes extending from its base.


Earth Notes: Juniper and Ash

Nov 24, 2016
Jim Harrigan

Nine hundred years ago the eruption of Sunset Crater volcano must have been a brilliant spectacle. Ultimately, nearly 750 square miles of northern Arizona were blanketed in cinders and ash. After the destruction, life slowly returned. 


Earth Notes: Vibes at Rainbow Bridge

Nov 16, 2016
NPS/B. Lee

Rainbow Bridge in southeast Utah is one of the largest natural bridges in the world. And though the immense sandstone span looks solid and unmoving, scientists are finding out otherwise. 

 

Tim Evanson

Long before Europeans arrived in the Western Hemisphere, turquoise was an exceptionally prized stone—used in jewelry and masks, for example. But the blue-green mineral doesn’t occur naturally in many of the same places where such artifacts have been found in the Southwest. 


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