violence linked to heat welcome news24emiguel.econ.berkeley.edu/assets/miguel_media/278/... ·...

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0 Related Links kalahari.com Climate Change Read more about the environmental changes and challenges the world faces. Now R261.00 BUY NOW Political leaders more obsessed with shortterm gains are hampering the move toward policies that will protect the environment, the WWF has said. (Boris Grdanoski, AP) Multimedia User Galleries News in Pictures Send us your pictures Send us your stories Pacific climate 'catastrophe' looms US wildfires likely bigger, more fierce Climate change to wipe out rarest cat Clock ticking for climate change push Obama takes on US power plants Violence linked to heat 20130802 08:56 Washington If the heat makes you cranky, take heart: You're not alone, according to a study out on Thursday in the US journal Science that links rising tempers to hot temperatures. The link could have worrying implications as the Earth's climate warms, researchers at the University of California at Berkeley and Princeton University warned. While making predictions about the future is always iffy, lead author Solomon Hsiang said the current trend is clear: Hotter weather makes people more violent. Hsiang and his fellow researchers conducted a metaanalysis of 60 studies across a range of disciplines, including archaeology, climatology, political science and economics. One study, for instance, showed that, during the hotter and drier periods of the El Niño southern oscillation, "the probability of any country in the tropics starting a new civil war doubles". Conflicts Other studies showed the incidence of interpersonal conflicts from murder to rape to domestic violence and other types of assault goes up when it gets hot. "We were surprised by both the consistency and the strength" of the link, Hsiang said, explaining it was evident no matter what timeframe was being examined, whether a short heat wave, a years long drought, or a cycle over centuries. "We do think the overall size of the effects is sufficiently large that we want to take them seriously and seriously consider whether or not our actions today are going to influence the level of violence in our children's world tomorrow," he added. In order to rule out other factors for the rise in violence, the authors used a statistical analysis that compared single geographic locations to themselves over time so that the political, cultural and geographic histories were internally consistent. They also tried to compare levels of violence where the climatic factors were very localised, to see how violence levels compared nearby where the weather stayed cooler. In all cases, "the collected evidence shows that humans across the globe have proven poorly MOST READ MOST COMMENTED NEWS IN YOUR AREA Zuma's secret deal with dictator Smash-and-grabber jumps to death Vavi: Jacob Zuma's cop out to get me BMW driver bust doing 219km/h on N1 Questions mount over Ramphele’s millions Recommend 4 DIY: Easy picture display This is a very easy, yet pretty idea to hang pictures on your wall. It’s personal and adds some fun to a roo Need to Know | Show-off Room | DIY Make yourself at home... Welcome to News24 Login | Sign Up Get Published! UPLOAD LAST UPDATED: 2013-08-26, 09:20 Human activity driving climate change Human activity is almost certainly the cause of climate change and global sea levels could rise by several feet by the end of the century. News Opinion Business Sport Tech Motoring Lifestyle Multimedia Focus isiZulu Jobs Property

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Page 1: Violence linked to heat Welcome News24emiguel.econ.berkeley.edu/assets/miguel_media/278/... · Vavi: Jacob Zuma's cop out to get me BMW driver bust doing 219km/h on N1 Questions mount

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kalahari.com Climate ChangeRead more about the environmentalchanges and challenges the world faces.Now R261.00 BUY NOW

Political leaders more obsessed with shorttermgains are hampering the move toward policies thatwill protect the environment, the WWF has said.(Boris Grdanoski, AP)

Multimedia   ∙   User Galleries   ∙   News in PicturesSend us your pictures  ∙  Send us your stories

Pacific climate 'catastrophe' loomsUS wildfires likely bigger, more fierceClimate change to wipe out rarest catClock ticking for climate change pushObama takes on US power plants

Violence linked to heat20130802 08:56

Washington  If the heat makes you cranky, takeheart: You're not alone, according to a study outon Thursday in the US journal Science that linksrising tempers to hot temperatures.

The link could have worrying implications as theEarth's climate warms, researchers at theUniversity of California at Berkeley and PrincetonUniversity warned.

While making predictions about the future isalways iffy, lead author Solomon Hsiang said thecurrent trend is clear: Hotter weather makespeople more violent.

Hsiang and his fellow researchers conducted ametaanalysis of 60 studies across a range ofdisciplines, including archaeology, climatology,political science and economics.

One study, for instance, showed that, during thehotter and drier periods of the El Niño southernoscillation, "the probability of any country in thetropics starting a new civil war doubles".

Conflicts

Other studies showed the incidence ofinterpersonal conflicts  from murder to rape todomestic violence and other types of assault goes up when it gets hot.

"We were surprised by both the consistency andthe strength" of the link, Hsiang said, explaining itwas evident no matter what timeframe was beingexamined, whether a short heat wave, a yearslong drought, or a cycle over centuries.

"We do think the overall size of the effects issufficiently large that we want to take themseriously and seriously consider whether or notour actions today are going to influence the levelof violence in our children's world tomorrow," headded.

In order to rule out other factors for the rise inviolence, the authors used a statistical analysis that compared single geographic locations tothemselves over time  so that the political, cultural and geographic histories were internallyconsistent.

They also tried to compare levels of violence where the climatic factors were very localised, to seehow violence levels compared nearby where the weather stayed cooler.

In all cases, "the collected evidence shows that humans across the globe have proven poorly

MOST READ MOST COMMENTED NEWS IN YOUR AREA

Zuma's secret deal with dictatorSmash-and-grabber jumps to deathVavi: Jacob Zuma's cop out to get meBMW driver bust doing 219km/h on N1Questions mount over Ramphele’s millions

 

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DIY: Easy picture displayThis is a very easy, yet pretty idea tohang pictures on your wall. It’spersonal and adds some fun to a roo

 

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LAST UPDATED: 2013-08-26, 09:20

Human activity driving climate changeHuman activity is almost certainly the cause of climatechange and global sea levels could rise by several feet by theend of the century.

News Opinion Business Sport Tech Motoring Lifestyle Multimedia Focus isiZulu Jobs Property

Page 2: Violence linked to heat Welcome News24emiguel.econ.berkeley.edu/assets/miguel_media/278/... · Vavi: Jacob Zuma's cop out to get me BMW driver bust doing 219km/h on N1 Questions mount

equipped to deal with exposure to hotter temperatures", colead author Marshall Burke said in astatement.

What was less clear was why, with researchers citing several theories and noting that more thanone could play a role.

Physiological effect

In times of drought or when harvests fail, economic factors might push groups to take up arms.

High unemployment tends to leave a large pool of frustrated, bored young people in cities  fertilerecruiting ground for an army.

And the heat also seems to have a physiological effect that drives people to violent impulses, onethat can be observed after just a few hours of exposure.

Hsiang compared the trend to the increase of car accidents on a rainy day  it doesn't mean anyone accident happened solely because it rained. Nor does it mean accidents only happen when itrains.

"Driver error ultimately causes accidents, but rain can make it much more likely," he said in thestatement.

"Similarly, violent conflicts might occur for a variety of reasons that simply become more likelywhen climatic conditions deteriorate."

 AFP

Read more on:    climate change

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Page 3: Violence linked to heat Welcome News24emiguel.econ.berkeley.edu/assets/miguel_media/278/... · Vavi: Jacob Zuma's cop out to get me BMW driver bust doing 219km/h on N1 Questions mount

John Smith  August 2, 2013 at 23:59 Report commentComments Policy

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Nooit nie....

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Wardan Chen  August 4, 2013 at 22:09 Report commentComments Policy

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Does that make Russians cool people in general?

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