19 Jul 2012:
Shows Ability to Trap CO2 in Ocean
An eight-year German research effort has shown that under the right conditions seeding the ocean with iron can trigger phytoplankton blooms that suck carbon out of the air and trap it deep in the ocean,
a potentially important breakthrough in the nascent field of climate geoengineering. Reporting in the journal Nature
, scientists from the Alfred Wegener Institute for Polar and Marine Research said that adding 14 tons of iron sulfate to the Southern Ocean near Antarctica resulted in a significant phytoplankton bloom extending more than 300 feet deep. That bloom consisted of large masses of algae, mainly composed of diatoms, which absorbed carbon dioxide from the atmosphere. More than 50 percent of the carbon-rich algae then sunk to a depth of more than 3,000 feet, where it is likely to be trapped for centuries. The German research team conducted the iron-seeding experiment in 2004 and then spent eight years analyzing the data. Previous iron-seeding experiments have had difficulty tracking the path of CO2 pulled out of the atmosphere because of swirling currents and other complications. But the Wegener research team said its experiment had succeeded because scientists found a 40-mile-wide column of water that was isolated from other ocean currents.
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
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
is now available for mobile devices at e360.yale.edu/mobile
The Warriors of Qiugang
, a Yale Environment 360
video, chronicles a Chinese village’s fight against a polluting chemical plant. It was nominated for a 2011 Academy Award for Best Documentary Short.
Watch the video.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.
, winner of the Yale Environment 360 Video Contest, documents the work of African researchers monitoring wildlife in Uganda's remote Bwindi Impenetrable National Park. Watch the video.