Carbon Dioxide Levels Atop Mauna Loa Hawaii

Did you know on May 9, 2013 the Mauna Loa CO2 level breached 400 parts per million for the first time?

The CO2 level has been rising continuously on a year over year basis for several decades now.

Typically, the levels reach a maximum during the late Spring season and begin to decrease as vegetation absorbs the carbon dioxide.

Then, by September and October, levels begin increasing again as deciduous trees and other vegetation lose their foliage.

Carbon dioxide has long been looked at as the primary greenhouse gas contributing to the global warming episode during these past decades.

Below is a snapshot of the most recent year over year chart of the daily and weekly average CO2 values.

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