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Using this graphic and referring to it is encouraged, and please use it in presentations, web pages, newspapers, blogs and reports. For any form of publication, please include the link to this page and give the cartographer/designer credit (in this case Riccardo Pravettoni, UNEP/GRID-Arendal)
Source(s)
National Oceanic and Atmospheric Administration (http://www.esrl.noaa.gov/gmd/ccgg/insitu.html)
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Uploaded on Tuesday 21 Feb 2012
by GRID-Arendal
Methane in Air Above Water Surface
Year:
2009
Author:
Riccardo Pravettoni, UNEP/GRID-Arendal
Description:
Mixing ratio of methane in the air above the water surface measured along a ship’s route in September 2005. The dotted line shows the Latitude-specific monthly average of 1.85 parts per million by volume established for the Barrow, Alaska, USA, monitoring station at 71° 19’ N, 156° 35’ W (http://www. cmdl.noaa.gov/ccgg/insitu.html); this is the normal level of methane in the atmosphere at this latitude.
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