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No Rise of Atmospheric Carbon Dioxide Fraction in Past 160 Years, New Research Finds
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[quote:picesnator:MV85NTQ5NzRfMTQ4NjM3NDJfNDQwRUM3N0Y=] [quote:Anonymous Coward 815916] In contradiction to some recent studies IOW, not conclusive. In any case, this is about the CO2 fraction, not the total amount, and it also says recent studies are suggesting that this fraction is indeed beginning to rise as a result of us. So this article SUPPORTS the AGW principle! yo......... brainless...........co2 was always a amokescreen for a whole diffeent agenda....and besides expalain to me how co2 is a toxic gas.....after ass we exhale the gas and it is part of the procees photosynthesis.... Yes, but what about methane? [/quote] the earth is the source of methane............ [/quote]
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link to www.sciencedaily.com
]
ScienceDaily (Dec. 31, 2009) — Most of the carbon dioxide emitted by human activity does not remain in the atmosphere, but is instead absorbed by the oceans and terrestrial ecosystems. In fact, only about 45 percent of emitted carbon dioxide stays in the atmosphere. However, some studies have suggested that the ability of oceans and plants to absorb carbon dioxide recently may have begun to decline and that the airborne fraction of anthropogenic carbon dioxide emissions is therefore beginning to increase.
Many climate models also assume that the airborne fraction will increase. Because understanding of the airborne fraction of carbon dioxide is important for predicting future climate change, it is essential to have accurate knowledge of whether that fraction is changing or will change as emissions increase.
To assess whether the airborne fraction is indeed increasing, Wolfgang Knorr of the Department of Earth Sciences at the University of Bristol reanalyzed available atmospheric carbon dioxide and emissions data since 1850 and considers the uncertainties in the data.
In contradiction to some recent studies, he finds that the airborne fraction of carbon dioxide has not increased either during the past 150 years or during the most recent five decades.
The research is published in Geophysical Research Letters.
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