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Showing posts from March, 2015

Amazon Forest Becoming Less of a Climate Change Safety Net

http://www.nytimes.com/2015/03/24/science/earth/amazon-forest-becoming-less-of-a-climate-change-safety-net.html Source:   By Justin Gillis, the New York Times. For Investigation:   10.3 Excerpt: The ability of the Amazon forest to soak up excess carbon dioxide is weakening over time, researchers reported last week. That finding suggests that limiting climate change could be more difficult than expected. For decades, Earth’s forests and seas have been soaking up roughly half of the carbon pollution that people are pumping into the atmosphere. That has limited the planetary warming that would otherwise result from those emissions. ...In a vast study spanning 30 years and covering 189,000 trees distributed across 321 plots in the Amazon basin, researchers led by a group at the University of Leeds, in Britain, reported that the uptake of carbon dioxide in the Amazon peaked in the 1990s, at about 2 billion tons a year, and has since fallen by half. ...“Forests are doing us a

Warming Arctic may be causing heat waves elsewhere in world

http://news.sciencemag.org/climate/2015/03/warming-arctic-may-be-causing-heat-waves-elsewhere-world Source:  By Carolyn Gramling, Science.  For Investigation:   10.3 Excerpt: Global warming is increasing temperatures twice as fast in the Arctic as elsewhere on the planet. Some scientists have suggested that this so-called Arctic amplification can alter circulation patterns that affect weather in the United States, Europe, and Asia, potentially helping cause the powerful winter storms and deep freezes that have blasted the midlatitudes over the past decade. A new study suggests Arctic warming could ultimately pack a summertime punch, too, possibly contributing to extreme events such as the deadly 2010 Russian heat wave. Melting sea ice in the Arctic has left vast expanses of dark open water available to absorb the sun’s energy. In the late autumn and early winter, when sea ice is at a minimum and temperatures begin to cool, the ocean releases that extra heat and moistu

New material captures carbon at half the energy cost

http://newscenter.berkeley.edu/2015/03/11/new-material-captures-carbon-at-half-the-energy-cost/ Source:  By Robert Sanders, UC Berkeley News Center For Investigation:   10.3 Excerpt: UC Berkeley chemists have made a major leap forward in carbon-capture technology with a material that can efficiently remove carbon from the ambient air of a submarine as readily as from the polluted emissions of a coal-fired power plant. The material then releases the carbon dioxide at lower temperatures than current carbon-capture materials, potentially cutting by half or more the energy currently consumed in the process. The released CO2 can then be injected underground, a technique called sequestering, or, in the case of a submarine, expelled into the sea....