16 Sep 2009:
Heat-Resistant Forests Could Reverse Warming in the Sahara, Study Says
Planting forests of quick-growing trees in the world’s most arid deserts and sustaining them with desalinated water from nearby oceans would cool the regions significantly and draw down billions of tons of carbon dioxide
, according to climate simulations being published in the journal Climatic Change
. The concept, proposed by cell biologist Leonard Ornstein of the Mount Sinai School of Medicine in New York, includes transporting desalinated water to parched deserts with aqueducts and pumps to support growth of such heat-resistant trees as eucalyptus. By watering the plants with drip irrigation, in which water is sent directly to the trees’ roots via plastic tubing, engineers could reduce water loss, says Ornstein, who calculated the climatic effects with NASA modelers. According to the models, planting heat-resistant trees in the Sahara Desert or the Australian outback could draw down about 8 billion tons of carbon annually. In the case of the Sahara, temperatures in the forests could drop by as much as 8°C. The costs of building and running reverse-osmosis plants for desalination and transporting the water would be about $2 trillion per year. “Any solution to climate change has to be a multitrillion-dollar project,” Ornstein says. “The issue is what the payback is.”
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
e360 on Facebook
Donate to e360
View mobile site
Subscribe to our newsletter
Subscribe to our feed:
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
Photographer Peter Essick documents the swift changes wrought by global warming in Antarctica, Greenland, and other far-flung places. View the gallery.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video that chronicles the story of a Chinese village’s fight against a polluting chemical plant, was nominated for a 2011 Academy Award for Best Documentary (Short Subject).
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
In a Yale Environment 360
video, photographer Pete McBride documents how increasing water demands have transformed the Colorado River, the lifeblood of the arid Southwest. Watch the video.