#1 "No Rise in Atmospheric Carbon Dioxide in Past 160 Years."
12-31-2009, 11:48 AM
- Join Date
- Aug 2005
No Rise of Atmospheric Carbon Dioxide Fraction in Past 160 Years, New Research Finds
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.
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.
12-31-2009, 12:31 PM
Another brick falls out of the AGW wall.Never argue with an idiot. They drag you down to their level then beat you with experience.
12-31-2009, 04:27 PM
- Join Date
- Dec 2009
HOLY CRAP !
Can anyone say smoking gun ?
12-31-2009, 09:20 PM
He is obviously a Nazi and member of the BFEE and also in
league with Big Oil!! :eek: How could you all be so blind????:DMay the FORCE be with you!
01-01-2010, 02:51 AM
Waiting for Wilbur to come and refute our blasphemy . . . .Stand up for what is right, even if you have to stand alone.
01-01-2010, 01:39 PM
- Join Date
- May 2008
Note that the title says: "No Rise of Atmospheric Carbon Dioxide Fraction In Past....". Pay special attention to the word fraction. I suspect most of you read this and took it to mean that the amount of CO2 in the atmosphere has not increased since 1850 (leading to the happy dances we see from the usual suspects). However, that would be both false, and absurd.
What the study actually investigates is the percentage of airborne CO2 that gets taken out of the air by carbon sinks, like the ocean, and how (or if) this percentage has changed over time. The article on sciencedaily cites the percent to be 45%. In other words, 45% of carbon emissions are removed from the atmosphere, by natural mechanisms.
Scientists have theorized that as these carbon sinks reach their absorption capacity, that %45 percent absorption rate will start to drop, and more carbon emissions will remain in the atmosphere. There has been some data that suggests that the percent has changed somewhat. The study cited set out to see if the percentage has changed over time (as more carbon emissions have increased). From what I gather, it hasnt changed in any statistically significant way during the time period studied (though there is much variation). Interesting, but it certainly doesn't have the profound implications that some here seem to think.
I don't know to what extent climate models rely on this percent, or estimates of projected drops in the airborn fraction - though I would be very surprised to see if none have taken into account a relatively static value.
What this doesn't do, is refute the fact that the actual amount of carbon in the atmosphere has increased dramatically (and continues to increase dramatically), due to human activity.
Last edited by wilbur; 01-01-2010 at 02:11 PM.
01-01-2010, 03:15 PM
What it seems to be saying is the amount of CO2 that is emitted by man and remaining in the atmosphere is being vastly over imagined in many climate models. Based on that, all future predictions using the anticipate levels of CO2 are untrustworthy.Never argue with an idiot. They drag you down to their level then beat you with experience.
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