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Using Radar to Protect Bats from Wind Turbines

batYour first thought at seeing a headline like that would be to assume that there would be some kind of special brake that was being used to slow or stop the blades of the turbine when it sensed a bat getting too close. But that isn't the case. Wind turbine blades have a tremendous amount of momentum, and can't effectively be stopped quickly. But radar nevertheless has the potential to mail order viagra significantly reduce the cialis where to buy number bats killed by wind turbines.

Researchers at the University of Aberdeen, Scotland discovered that bats tend to avoid radar installations. Although the exact method is not clear, it is possible that the radar somehow stimulates the bats' ears and creates a perception of unwanted noise.

"This was noticed when radar arrays first started up during World War II," Racey said. "A portion of radar operators said they heard clicks in their ears when they were switched on." Radar signals can lead to small but rapid spikes of cheapest levitra uk heat in the head that generate sound waves, which in turn stimulate the ear. "A bat's hearing is much more sensitive than ours," Racey noted. "It may be so sensitive that even a tiny amount of sound caused by electromagnetic radiation is enough to drive them out of there."
In tests, deploying a small radar unit in an area full of insects (tasty feeding ground for bats) showed a 30-40% decrease in bats in the area, although the cialis information insects were still there. The radar did not make the insects leave, but the bats stayed away. This could turn out to be a good deterrent to keep bats safely away from wind turbines, and help make wind power that much better.

via: Slashdot

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Comments (9)Add Comment
0
what about us!!?
written by steve, July 25, 2009
..."Radar signals can lead to small but rapid spikes of heat in the head that generate sound waves, which in turn stimulate the ear"...

Thanks for telling us now. sounds like something that could be pertinent for humans, but lets worry about the bats first.
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Of course....
written by Malik Graves-Pryor, July 25, 2009
the looming issue at hand is what happens when wind turbines are installed in areas where bats naturally reside, hunt, or migrate through.

This would be a rather nasty disruption of their natural habitat.

I hope there is a better way of handling this.
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...
written by Bob Wallace, July 25, 2009
Somewhere in the eastern part of the US there is a wind farm built where bats congregate for a few weeks of the year. (This was discovered after the farm was built.)

They shut down the turbines during bat visitation periods.

We learn. But sometimes we don't know what might be a bad idea until we try it out.

Remember the grid turbine towers at Altamont and get viagra without prescription how the amarragessansfrontieres.com raptors perched on them? Notice how turbines are now mounted on monopod?
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...
written by Paul Turner, July 27, 2009
Is there really much evidence to canadian rx viagra show that any significant numbers of bats are killed / injured by wind turbines? I can vividly remember a film clip of canadian pharmacy scam a small bat flying through the blades of a table fan set at low speed; when the fan was running faster the bat avoided it. Have any definitive studies been made?
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written by Bob Wallace, July 27, 2009
It looks like a problem.

Here's an article about reducing bat deaths. During the pre-test period they recorded 32 deaths in 11 weeks for a 34 turbine field.

That's significantly higher than turbine/bird deaths which happen at under one death per turbine per year.

They found that turning off the turbines at night when the wind was blowing slow cut deaths 70%. Apparently bats are more active during periods of low wind. That might be because insects have trouble flying in high winds?

http://greeninc.blogs.nytimes.com/2009/05/18/study-finds-reduction-in-turbine-bat-kills/
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written by Fred, July 27, 2009
Thats a good idea to keep the from getting caught
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written by Paul Turner, July 27, 2009
Bob, interesting information. What I find strange is levitra per nachnahme the http://www.eastgreenbushlibrary.org/levitra-sale-buy number of bats damaged when the turbines are static.
Do they bump into trees? Hmmmm....
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...
written by Bob Wallace, July 27, 2009
Hadn't noticed the part about crashing into stopped turbines. Wonder if the curved surfaces of blades and monopods might not return a good reflection?

Stealth turbines?
0
A bit less habitat disruption than mountain-top removal ...
written by BruceMcF, October 05, 2009
... coal mining, but certainly well worth studying is how localized the effect can be made. Since even ridge-line turbines will not be packed in tightly one next to the other, a radar level that can shoo bats away from individual turbines would be the ideal.

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