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Earth's CO2 absorption not as bad as expected, controversial climate change study finds
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November 12, 3:57 AMFt. Lauderdale Science News ExaminerAnna Sanclement
The balance between the airborne and the fraction of absorbed carbon dioxide has stayed nearly the same since 1850. Even with CO2 emissions having risen from some 2 billion tons a year to today's 35 billion tons a year, new data shows.
This data implies that the ecosystems on Earth are much more capable to absorb CO2 than was previously believed.
These results are in opposite opinion from a large amount of research that anticipated the CO2 absorbing capacity of the ecosystems and oceans to start diminishing as the carbon dioxide emissions rose.
This would lead the greenhouse gas levels to shoot up considerably. But the fact is that the trend in the airborne fraction since 1850 has only been 0.7 plus/minus 1.4 percent per ten years, found Dr. Wolfgang Knorr at the University of Bristol. This number is pretty much equal to zero.
Airborne fraction of C02 has not risen in past 150 years, new research finds
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anuary 2, 7:27 PM Ft. Lauderdale Science News Examiner Anna Sanclement
New studies have found that most of the CO2 emitted by man does not stay in the atmosphere as previously believed. Instead, it is absorbed by terrestrial ecosystems and the oceans.
Some studies have suggested that this absorbing ability has been decreasing and that the airborne fraction has started to increase. Hence, with such contradicting findings, it is imperative that an accurate outlook is achieved to be able to predict climate change more efficiently.
To figure out if the airborne fraction is in fact increasing, Wolfgang Knorr of the department of Earth Sciences at the University of Bristol looked through and analyzed atmospheric carbon dioxide and emission data from the past 150 years. He found that there has been no increase in the airborne fraction of carbon dioxide since 1850, or even during the last five decades.
This could indeed change how scientists are assessing future climate change due to CO2, such as warming, since the phenomenons they are using to correlate them are at risk of being faulty.
These research findings have been published in Geophysical Research Letters.