File:Major greenhouse gas trends.png
From Global Warming Art
Global trends in major greenhouse gas concentrations. The rise of greenhouse gases, and their resulting impact on the greenhouse effect, are believed to responsible for most of the increase in global average temperatures during the last 50 years.  This change, known as global warming, has provoked calls to limit the emissions of these greenhouse gases (e.g. Kyoto Protocol). Notably, the chlorofluorocarbons CFC-11 and CFC-12 shown above have undergone substantial improvement since the Montreal Protocol severely limited their release due to the damage they were causing to the ozone layer.
At present, approximately 99% of the 100-year global warming potential for all new emissions can be ascribed to just the three gases: carbon dioxide, methane and nitrous oxide. (See figure at right for details and reference.)
- Similar: Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons (CFC-11, CFC-12, and CFC-113) in Whole-air Samples: http://cdiac.ornl.gov/trends/otheratg/blake/blake.html
- Regional: Methane in Coastal Sea Water, Sea Ice, and Bottom Sediments, Beaufort Sea, Alaska, U.S. Geological Survey Open-File Report 95-70: http://pubs.usgs.gov/openfile/of95-070/core/meta/report.html
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|current||08:22, 24 November 2005||640×480 (57 KB)||Robert A. Rohde|