Diane Hope http://knau.org en Measures of Drought http://knau.org/post/measures-drought <p>Drought is a universally understood phenomenon — especially here in the arid Southwest. But what does drought really mean? To help define the term, and the concept, scientists use several commonly used drought indices. Each summarizes thousands of data points on rainfall and other information into a single handy number.</p><p> Wed, 04 Dec 2013 14:33:49 +0000 Diane Hope 40534 at http://knau.org Measures of Drought Earth Notes: Protecting The Plateau's Ancient Walls http://knau.org/post/earth-notes-protecting-plateaus-ancient-walls <p>In the latest installment of KNAU's environmental series, Earth Notes, we hear about some of the best practices for preserving ancient rock buildings on the Colorado Plateau.</p><p> Wed, 20 Feb 2013 12:03:00 +0000 Diane Hope 27470 at http://knau.org Earth Notes: Protecting The Plateau's Ancient Walls Earth Notes: The Crown Fire - Carbon Connection http://knau.org/post/earth-notes-crown-fire-carbon-connection <p>Forests constitute an important part of the “Carbon World Bank.” The organic matter in their leaves, wood, roots and soil stores a great deal of carbon absorbed from the atmosphere. Wed, 14 Nov 2012 12:00:00 +0000 Diane Hope 23320 at http://knau.org Earth Notes: The Crown Fire - Carbon Connection 100 Years of Ranching in Arizona http://knau.org/post/100-years-ranching-arizona <p dir="LTR"><font size="5">As we look back over 100 years of Arizona's statehood this year, it would be a serious omission not to consider one of the traditional cornerstones of Arizona's economy - ranching. Tue, 28 Aug 2012 11:00:00 +0000 Diane Hope 19325 at http://knau.org 100 Years of Ranching in Arizona Earth Notes: Arizona Mountain Tree Frog http://knau.org/post/earth-notes-arizona-mountain-tree-frog <p>In 1986, after a statewide vote by thousands of school children, the Arizona Tree Frog became Arizona&rsquo;s official state amphibian. Beating out better-known rivals like the spadefoot toad by a wide margin, this small and seldom-seen frog might seem an unlikely candidate for top spot. But it makes sense when you realize how much they love to climb.</p><p>Rarely more than two inches long, with smooth green skin and a dark stripe running from eye to rear, these amphibians live mostly above 5,000 feet in the forests of central-northern Arizona, close to streams and wet meadows.</p> Wed, 25 Jul 2012 11:00:00 +0000 Diane Hope 17091 at http://knau.org Earth Notes: Arizona Mountain Tree Frog Earth Notes: Honoring the Sun IV--Using Solar Ovens http://knau.org/post/earth-notes-honoring-sun-iv-using-solar-ovens <p>This week <em>Earth Notes</em> concludes its series on the sun with a look at how to use a backyard solar oven. You can&nbsp;use one anywhere there&rsquo;s a few square feet of sunny exposure on a backyard or balcony.</p><p>And yes, you can use a solar oven on some winter days. Even when it&rsquo;s cold and the ground is covering with snow, a cooker will work if you have enough sunshine and your solar oven is well insulated. But you&rsquo;ll need to use the midday hours when the sun is at least 45 degrees above the horizon&mdash;that means your shadow is shorter than your height.</p> Wed, 28 Dec 2011 07:00:00 +0000 Diane Hope 8821 at http://knau.org Earth Notes: Honoring the Sun IV--Using Solar Ovens Earth Notes: Honoring the Sun III--Developing Solar Ovens. http://knau.org/post/earth-notes-honoring-sun-iii-developing-solar-ovens <p>This&nbsp;week <em>Earth Notes</em> continues its series on the sun, with a look at turning your backyard into a kitchen</p><p>Just as the inside of a parked car heats up on a sunny day, a solar cooker traps the sun&rsquo;s rays in its enclosed interior, causing water, fat and protein molecules in the food to heat up. The molecules vibrate vigorously, and the food cooks.</p> Wed, 21 Dec 2011 07:00:00 +0000 Diane Hope 8819 at http://knau.org Earth Notes: Honoring the Sun III--Developing Solar Ovens.