CO2 levels likely to stay above 400ppm for the rest of our lives, new study shows

June 16, 2016 by  
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A new study reveals that carbon dioxide (CO2) concentrations in the atmosphere are likely to remain above 400 parts per million (ppm) throughout this year and for many years to come. Scientists from the Met Office Hadley Centre and Scripps Institution of Oceanography scrutinized data from NOAA’s Mauna Loa Observatory in Hawaii and forecasted that levels would not dip below 400ppm for ‘our lifetimes.’ According to the UN’s Intergovernmental Panel on Climate Change (IPCC), CO2 concentrations of ” about 450ppm or lower are likely to maintain warming below 2 degrees Celsius over the 21st century relative to pre-industrial levels.” But lead author on the paper Richard Betts said we could pass that number in 20 years or less. He told the Guardian that even if we reduce emissions immediately, we might be able to delay reaching 450ppm but “it is still looking like a challenge to stay below 450ppm.” Related: Global CO2 concentrations exceed 400ppm ‘point of no return’ for first time Paper co-author Ralph Keeling said, “Back in September last year, we suspected that we were measuring CO2 concentrations below 400ppm for the last time. Now it is looking like this was indeed the case.” El Niño has played a role in climbing carbon dioxide levels, but we’ll likely see higher CO2 levels than the last large El Niño storm during 1997 and 1998 because ” manmade emissions ” have risen by 25 percent since that storm, according to The Guardian. Met Office experts are fairly confident in these projections. They predicted in November 2015 that in May 2016 “mean concentrations of atmospheric CO2” would hit 407.57ppm. The actual figure was 407.7ppm. During 2015, NOAA reported that the “annual growth rate” of C02 in the atmosphere rose by 3.05ppm . NOAA lead scientist Pieter Tans said “Carbon dioxide levels are increasing faster than they have in hundreds of thousands of years. It’s explosive compared to natural processes.” Via The Guardian Images via Rick Sharloch on Flickr and NOAA Photo Library on Flickr

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CO2 levels likely to stay above 400ppm for the rest of our lives, new study shows

Man-Made Particles Affect Hurricane Activity in Surprising Ways

June 24, 2013 by  
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Image via Shutterstock Researchers from the UK Met Office have discovered that the presence of man-made aerosols affects hurricane activity, but not in the way that one might automatically assume. It turns out that during the 20th century, aerosols in the atmosphere slowed down hurricane activity, and that efforts to clean them up since the 1980s has resulted in increased hurricane activity . Read the rest of Man-Made Particles Affect Hurricane Activity in Surprising Ways Permalink | Add to del.icio.us | digg Post tags: aerosols , Environment , global warming , greenhouse gas emissions , hurricane season , link between manmade particles and hurricanes , News , tropical storms , UK Met Office        

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Man-Made Particles Affect Hurricane Activity in Surprising Ways

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