Thomas R. O'Donnell

Posts Tagged ‘wind energy’

Climatologists offer evidence – and encourage action – on climate change

In Government on August 19, 2019 at 7:27 am
An aerial view of flooding at Camp Ashland, Nebraska on March 17, 2019.

An aerial view of the flooding at the Camp Ashland, Nebraska on March 17, 2019, after a Platte River levee broke. Nebraska experienced its worst flooding ever in spring 2019, something climatologists say is likely to become more common under global climate change. Credit: Staff Sgt. Herschel Talley, Nebraska National Guard, via photopin (license).

When you want to learn about climate change, talk people who study climate.

SciLine, the science information service for journalists, did just that. As part of a science essentials boot camp for political reporters, the nonprofit (associated with the American Association for the Advancement of Science) gathered three state climatologists before a Science Center of Iowa audience earlier this month.

The climate mavens from Iowa, Nebraska and North Carolina were unequivocal in their assertion that man-made climate change is real. Doubts among the public, especially farmers, are fading as bouts of extreme weather become more common, they said.

The three experts varied somewhat, however, in their thoughts on how we should respond to the climate change threat. And it seemed to me that the discussion mostly missed the point in a substantial way.

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Roughly speaking: How corn fields affect wind power production versus soybean fields

In University research on January 5, 2015 at 6:25 am
he corn beneath these MidAmerican Energy wind turbines near Blairsburg isn't yet quite as high as an elephant's eye. When the stalks reach maturity, their roughness can cut wind speed (and power production) at the turbine's hub, hundreds of feet up.

The corn beneath these MidAmerican Energy wind turbines near Blairsburg isn’t yet quite as high as an elephant’s eye. When the stalks reach maturity, their roughness can cut wind speed (and power production) at the turbine’s hub, hundreds of feet up. Credit: Todd Spink, National Renewable Energy Laboratory.

Charles Robinson rarely gives any thought to what he plants under the 3½ wind turbines (he shares one with a neighbor) on his farm near Greeley, in northeast Iowa’s Delaware County.

The giant windmills are a boon for him and dozens of other farmers in the state, providing an income stream from wind farm operators. With more than 3,000 turbines installed (PDF), Iowa is a national leader in renewable wind energy.

Like most Iowa farmers, Robinson plants a rotation of corn and soybeans. He never thought whether it was one or the other was relevant for the power the turbines produce. “The blades are so high, it wouldn’t bother anything,” he told me last week.

But Brian Vanderwende, a doctoral student in atmospheric and oceanic sciences at the University of Colorado, Boulder, and his adviser, Julie Lundquist, wondered: How do the crops planted below turbines influence the wind that spins their blades?

Last month, Vanderwende presented the surprising answer at the American Geophysical Union Fall Meeting in San Francisco.

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