22 Sep 2010:
Global Warming Reaches
Deep Ocean Depths, Scientists Say
The warming trend on the planet has reached deep into world oceans over the last two decades
, particularly in the waters around Antarctica, according to a new study. While earlier studies have shown that the upper levels of the planet’s oceans are getting warmer, scientists with the U.S. National Oceanic and Atmospheric Administration say their latest research shows that waters at a depth of 3,300 feet and more have absorbed about 16 percent of the heat accumulating in the upper layers of the ocean. While the temperature increase is relatively slight — about 0.02 degrees C per decade in the Southern Ocean, and less elsewhere — researchers say it’s still a significant increase given the massive volume of water involved and the high capacity of water to absorb heat. That temperature increase has not only caused ocean water to expand worldwide, increasing sea levels, but has contributed to the melting of some Antarctic ice sheets, according to the paper, published in the Journal of Climate
. Sea levels around Antarctica have increased by 3 millimeters annually — about an eighth of an inch — since 1993.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.