giant ocean tubes proposed as global warming fix

giant ocean tubes proposed as global warming fix   news home animal news ancient world environment news cultures news science & space news weird news giant ocean tubes proposed as global warming fix kate raviliousfor national geographic news september 26, 2007 imagine an ocean full of giant pipes that pump up cold, nutrient-rich water from deep below, encouraging surface algae to bloom and suck carbon dioxide from the atmosphere. that's the controversial new vision of james lovelock, the independent british scientist best known for proposing the gaia hypothesis, and chris rapley, a space physicist and director of london's science museum. enlarge photo printer friendly email to a friend related global warming fast facts (june 14, 2007) extreme global warming fix proposed: fill the skies with sulfur (august 4, 2006) what is global warming? the pair claims that such climate engineering solutions may be the only way to hold global warming at bay given its current progress. (see a global warming interactive.) "global warming appears to be an irreversible process, and if we don't do anything then the world will just heat up to a stable, hot state," lovelock said. "the stakes are now so high that we have to act." but other experts are skeptical, pointing out that the scheme could release more carbon than it absorbs while putting fragile marine life in danger. (related: "plan to dump iron in ocean as climate fix attracts debate" [july 25, 2007].) wave-powered lovelock and rapley say their proposal is the oceanic equivalent of planting trees. but with more than two-thirds of earth covered in ocean, the plan could be applied on a much grander scale. the pair's preliminary calculations indicate that an array of between 10,000 and 100,000 pipes would be required, with each pipe around 33 feet (10 meters) wide and 330 feet (100 meters) long. wave energy would make the pipes bob up and down. one-way valves inside the pipes would then force water to circulate, bringing nutrient-rich water up to the surface. "this would stimulate algal growth and help to draw down carbon dioxide," lovelock said. a further benefit from the increased algal blooms is that they would produce dimethyl sulfide, a chemical that helps sunlight-reflecting clouds to form, the scientists say. the idea is outlined in this week's issue of the journal nature. continued on next page >> latest news videos video: oil spills in the black sea video: "toilet" house makes a point video: croc gene map would be first more videos in the news sources and related web sites massachusetts institute of technology: penny chisholm university of southhampton: eric achterberg james lovelock university corporation for atmospheric research in boulder nature london science museum 15 most popular news pages photos in the news news videos advertisement latest photos in the news photo gallery: most endangered bears ranked photo gallery: ancient "fire temple" found in peru week in photos: chess boxing, volcano erupts, more more photos in the news national geographic's photo of the day • today's photo • download as wallpaper news feeds       get our news delivered directly to your desktop—free. how to use xml or rss podcasts national geographic to go national geographic news, videos, and more download podcasts free newsletter sign up for our free inside national geographic newsletter. every two weeks we'll send you our top stories and photos (see sample). email the news staff contact other staff   advertisement

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