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Wind farms increase nighttime ground temperatures: Study

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Large windfarms can increase local night time temperatures by fanning warmer air onto the ground, new research has revealed. The study used satellite data to show that the building of huge wind farms in west Texas over the last decade has warmed the nights by up to 0.72C.

“Wind power is going to be a part of the solution to the climate change, air pollution and energy security problem,” said Liming Zhou, at the University of Albany in New York. “But understanding the impacts of wind farms is critical for developing management strategies to ensure the long-term sustainability of wind power.”

West Texas has seen rapid expansion of wind farms, with turbine numbers rising from 111 in 2003 to 2358 in 2011. Zhou’s team compared the land surface temperatures at the wind farms with other areas across this period and detected a clear rise at night.

They note, however, that the effect on the air temperature, which is usually given in weather forecasts, will be lower than 0.72C rise because they respond less quickly to changes than land temperatures.

The scientists say the effect is due to the gentle turbulence caused by the wind turbines. After the sun has set, the land cools down more quickly than the air, leaving a cold blanket of air just above the ground. But the turbine wakes mix this cold layer with the warmer air above, raising the temperature. A previous study found a similar effect but was based on data from only two weather stations over just six weeks.

“The result looks pretty solid to me,” said Steven Sherwood at the climate change research centre at the University of New South Wales, Australia. “The same strategy is commonly used by fruit growers, who fly helicopters over the orchards rather than erect windmills, to combat early morning frosts.”

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“Overall, the warming effect reported in our study is local and is small compared to the strong year-to-year changes” that result from natural variation, said Zhou. The study is published in the journal Nature Climate Change.

He told the Guardian that his results could not be used as an justification for blocking new wind farms. “The warming might have positive effects,” he said. “Furthermore, this study is focused only on one region and for only 9 years. Much more work is needed before we can draw any conclusion.”

guardian.co.uk © Guardian News and Media 2012

Photo by Chrishna via Flickr

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‘Veto the Cheato’: Americans gathered nationwide for #ImpeachTrump rallies

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Frustrated Americans on Saturday attended #ImpeachTrump rallies from coast-to-coast.

The rallies were organized by MoveOn, Indivisible, Democracy for America, the Women's March, Credo and other progressive organizations.

Over 140 events were held nationwide.

[caption id="attachment_1513038" align="aligncenter" width="800"] Map of #ImpeachTrump rallies in the contiguous United States.[/caption]

Many attendees took the time to create hand-made protest signs, while others held printed banners.

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Mississippi fast food cashier ‘terminated immediately’ for ugly racist slur on customer’s receipt

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The owner of a fast food restaurant in Mississippi "terminated immediately" an employee after a racist and misogynistic slur of patrons.

When Lex Washington visited Who Dat's Drive-Thru in Oxford with her roommate, the cashier listed them on the receipt as "black b*tches in a silver car."

A manager reportedly refused to apologize at the time, and instead "laughed in her face."

A photo of the receipt then spread on social media.

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George Conway calls out fears Trump will compromise new US intelligence initiative aimed at Russia

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On Saturday, George Conway drew attention to a specific passage of a new article from The New York Times about the intelligence community's efforts to counterattack the Russian power grid, in response to years of covert Kremlin attacks on our own:

“[O]fficials described...hesitation to go into detail with Mr. Trump about operations against Russia for concern...that he might countermand it or discuss it with foreign officials, as he did in 2017 when he mentioned a sensitive operation...to the Russian foreign minister.” https://t.co/BXTjjXBmia

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