Tuesday, January 30, 2007

Against the wind (farm)

Quite a lot of anti-wind farm stuff in this New Scientist article. They tend not to be great for bogs if they are built on them (as many apparently are in Europe), which is a pity since bogs store a lot of CO2. (Australia needs more of them, obviously.)

But if you build them in deserts instead:

The ecological impact in these environments is largely unstudied. Somnath Baidya Roy from Princeton University and his team have done research suggesting that rotating turbine blades lead to desiccation of the surrounding area, which may be particularly damaging in deserts (Journal of Geophysical Research Atmospheres, DOI: 10.1029/2004JD004763). In addition, a recent study of Californian ground squirrels reveals that those living close to wind farms are more edgy and cautious than those that inhabit areas of desert where there are no turbines.

Well, maybe I wouldn't lose too much sleep about squirrels getting nervous. But the birds, well that is a different matter. The article goes on:

After re-analysing previous studies last year, researchers at the University of Birmingham, UK, concluded: "Available evidence suggests that wind farms reduce the abundance of many bird species at the wind farm site." But the most striking aspect of their report was how little evidence is available. The researchers found just 15 articles drawing on 19 datasets, of which only nine were complete. Lead author Gavin Stewart says that many studies are kept secret, sometimes for commercial reasons, with statistics on bird kills being kept from bird conservationists.

And there is more detail in the article about how many birds are killed in some locations.

It's always fun when later studies bolster a hunch.

Update: I see this was actually an article from July 2006 which the New Scientist website has only just made available for free. No matter. Still good reading.

1 comment:

Caz said...

Oh, forget the squirrels and birds: wind farms are by far the most costly and inefficient means for provision of re-newable energy sources. They should be avoided on purely economic and common sense grounds; no other reasons are needed.