Syrian children in the Za'atari refugee camp in Jordan collect water from a project built by Oxfam International. (Photo: Oxfam/flickr/cc)
How Climate Change Hastened Syria's Civil War
Human-induced drying in many societies can push tensions over a threshold that provokes violent conflict
Climate change can make storms stronger, cold spells longer and water supplies drier. But can it cause war? A new study published today in Proceedings of the National Academy of Sciences says drought in Syria, exacerbated to record levels by global warming, pushed social unrest in that nation across a line into an open uprising in 2011. The conflict has since become a major civil war with international involvement.
Drying and drought in Syria from 2006 to 2011--the worst on record there--destroyed agriculture, causing many farm families to migrate to cities. The influx added to social stresses already created by refugees pouring in from the war in Iraq, explains Richard Seager, a climate scientist at Columbia University's Lamont-Doherty Earth Observatory who co-authored the study. The drought also pushed up food prices, aggravating poverty. "We're not saying the drought caused the war," Seager said. "We're saying that added to all the other stressors, it helped kick things over the threshold into open conflict. And a drought of that severity was made much more likely by the ongoing human-driven drying of that region."
Seager added that the entire Middle East "faces a drier, hotter climate due to climate change. This will stress water resources and agriculture, and will likely further increase risk of conflict." Global warming is desiccating the region in two ways: higher temperatures that increase evaporation in already parched soils, and weaker winds that bring less rain from the Mediterranean Sea during the wet season (November to April).
A number of research efforts in recent years have suggested that warmer temperatures and drought increase the risk of violent conflict around the world. A 2009 study found that over the past 30 years in sub-Saharan Africa, temperature rise correlated with an increase in the likelihood of civil war. A 2011 study implicated climate change in pushing up food prices in Egypt, fueling revolution there.
Trouble related to drought in the Middle East may get worse. The United Nations Intergovernmental Panel on Climate Change has predicted that human effects on climate change will make the area drier than it would have become without the manmade influences.
The U.S. Defense Department is taking the warning seriously. It issued a report last November declaring climate change a "threat multiplier" that will impact national security. When Scientific American asked Seager if his group's research supports that point of view he said, "Yes. It does. Climate change is very much a cause of concern for national, regional and international security and this study makes clear how that can work. The Syrian war has now taken on a life of its own...however, a drought made worse by climate change was one important factor that initiated the social unraveling."
Colin Kelley, a climatologist at the University of California, Santa Barbara, who led the work while finishing his doctorate at Lamont-Doherty, concurred, but was also careful to state that severe droughts can have a catalytic effect and contribute to, but not cause, civil unrest.
Although snowstorms and rising sea levels garner more of the headlines about extreme weather driven by climate change, drought is quickly rising as the most troublesome, near-term impact. Another paper in PNAS suggests links between global warming and the terrible, ongoing drought in California. Although civil unrest is far less likely there, tension is indeed growing between political leaders in northern and southern California over who gets the increasingly scarce water from rivers, underground aquifers and snow melt, all of which are declining.
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Climate change can make storms stronger, cold spells longer and water supplies drier. But can it cause war? A new study published today in Proceedings of the National Academy of Sciences says drought in Syria, exacerbated to record levels by global warming, pushed social unrest in that nation across a line into an open uprising in 2011. The conflict has since become a major civil war with international involvement.
Drying and drought in Syria from 2006 to 2011--the worst on record there--destroyed agriculture, causing many farm families to migrate to cities. The influx added to social stresses already created by refugees pouring in from the war in Iraq, explains Richard Seager, a climate scientist at Columbia University's Lamont-Doherty Earth Observatory who co-authored the study. The drought also pushed up food prices, aggravating poverty. "We're not saying the drought caused the war," Seager said. "We're saying that added to all the other stressors, it helped kick things over the threshold into open conflict. And a drought of that severity was made much more likely by the ongoing human-driven drying of that region."
Seager added that the entire Middle East "faces a drier, hotter climate due to climate change. This will stress water resources and agriculture, and will likely further increase risk of conflict." Global warming is desiccating the region in two ways: higher temperatures that increase evaporation in already parched soils, and weaker winds that bring less rain from the Mediterranean Sea during the wet season (November to April).
A number of research efforts in recent years have suggested that warmer temperatures and drought increase the risk of violent conflict around the world. A 2009 study found that over the past 30 years in sub-Saharan Africa, temperature rise correlated with an increase in the likelihood of civil war. A 2011 study implicated climate change in pushing up food prices in Egypt, fueling revolution there.
Trouble related to drought in the Middle East may get worse. The United Nations Intergovernmental Panel on Climate Change has predicted that human effects on climate change will make the area drier than it would have become without the manmade influences.
The U.S. Defense Department is taking the warning seriously. It issued a report last November declaring climate change a "threat multiplier" that will impact national security. When Scientific American asked Seager if his group's research supports that point of view he said, "Yes. It does. Climate change is very much a cause of concern for national, regional and international security and this study makes clear how that can work. The Syrian war has now taken on a life of its own...however, a drought made worse by climate change was one important factor that initiated the social unraveling."
Colin Kelley, a climatologist at the University of California, Santa Barbara, who led the work while finishing his doctorate at Lamont-Doherty, concurred, but was also careful to state that severe droughts can have a catalytic effect and contribute to, but not cause, civil unrest.
Although snowstorms and rising sea levels garner more of the headlines about extreme weather driven by climate change, drought is quickly rising as the most troublesome, near-term impact. Another paper in PNAS suggests links between global warming and the terrible, ongoing drought in California. Although civil unrest is far less likely there, tension is indeed growing between political leaders in northern and southern California over who gets the increasingly scarce water from rivers, underground aquifers and snow melt, all of which are declining.
Climate change can make storms stronger, cold spells longer and water supplies drier. But can it cause war? A new study published today in Proceedings of the National Academy of Sciences says drought in Syria, exacerbated to record levels by global warming, pushed social unrest in that nation across a line into an open uprising in 2011. The conflict has since become a major civil war with international involvement.
Drying and drought in Syria from 2006 to 2011--the worst on record there--destroyed agriculture, causing many farm families to migrate to cities. The influx added to social stresses already created by refugees pouring in from the war in Iraq, explains Richard Seager, a climate scientist at Columbia University's Lamont-Doherty Earth Observatory who co-authored the study. The drought also pushed up food prices, aggravating poverty. "We're not saying the drought caused the war," Seager said. "We're saying that added to all the other stressors, it helped kick things over the threshold into open conflict. And a drought of that severity was made much more likely by the ongoing human-driven drying of that region."
Seager added that the entire Middle East "faces a drier, hotter climate due to climate change. This will stress water resources and agriculture, and will likely further increase risk of conflict." Global warming is desiccating the region in two ways: higher temperatures that increase evaporation in already parched soils, and weaker winds that bring less rain from the Mediterranean Sea during the wet season (November to April).
A number of research efforts in recent years have suggested that warmer temperatures and drought increase the risk of violent conflict around the world. A 2009 study found that over the past 30 years in sub-Saharan Africa, temperature rise correlated with an increase in the likelihood of civil war. A 2011 study implicated climate change in pushing up food prices in Egypt, fueling revolution there.
Trouble related to drought in the Middle East may get worse. The United Nations Intergovernmental Panel on Climate Change has predicted that human effects on climate change will make the area drier than it would have become without the manmade influences.
The U.S. Defense Department is taking the warning seriously. It issued a report last November declaring climate change a "threat multiplier" that will impact national security. When Scientific American asked Seager if his group's research supports that point of view he said, "Yes. It does. Climate change is very much a cause of concern for national, regional and international security and this study makes clear how that can work. The Syrian war has now taken on a life of its own...however, a drought made worse by climate change was one important factor that initiated the social unraveling."
Colin Kelley, a climatologist at the University of California, Santa Barbara, who led the work while finishing his doctorate at Lamont-Doherty, concurred, but was also careful to state that severe droughts can have a catalytic effect and contribute to, but not cause, civil unrest.
Although snowstorms and rising sea levels garner more of the headlines about extreme weather driven by climate change, drought is quickly rising as the most troublesome, near-term impact. Another paper in PNAS suggests links between global warming and the terrible, ongoing drought in California. Although civil unrest is far less likely there, tension is indeed growing between political leaders in northern and southern California over who gets the increasingly scarce water from rivers, underground aquifers and snow melt, all of which are declining.