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File:Mauna Loa Carbon Dioxide.png

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Description

This figure shows the history of atmospheric carbon dioxide concentrations as directly measured at Mauna Loa, Hawaii. This curve is known as the Keeling curve, and is an essential piece of evidence of the man-made increases in greenhouse gases that are believed to be the cause of global warming. The longest such record exists at Mauna Loa, but these measurements have been independently confirmed at many other sites around the world .

The annual fluctuation in carbon dioxide is caused by seasonal variations in carbon dioxide uptake by land plants. Since many more forests are concentrated in the Northern Hemisphere, more carbon dioxide is removed from the atmosphere during Northern Hemisphere summer than Southern Hemisphere summer. This annual cycle is shown in the inset figure by taking the average concentration for each month across all measured years.

The red curve shows the average monthly concentrations, and blue curve is a moving 12 month average.

Copyright

This figure was created by Robert A. Rohde from published data and is incorporated into the Global Warming Art project.

English Wikipedia history

06:04, April 2, 2007 Dragons flight (Talk | contribs | block) 800×547 34 KB spelling

07:28, July 2, 2006 Dragons flight (Talk | contribs | block) 600×410 24 KB {{GWArt}}

Image from Global Warming Art
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