[See update below]
A new post on The Hockey Schtick reviews a new paper “that finds only about 3.75% [15 ppm] of the CO2 in the lower atmosphere is man-made from the burning of fossil fuels, and thus, the vast remainder of the 400 ppm atmospheric CO2 is from land-use changes and natural sources such as ocean outgassing and plant respiration.”
The contention made by HockeySchtick seems to be supported by old table from the Energy Information Administration which shows the same thing: only about 3% of atmospheric carbon dioxide is attributable to human sources. The numbers are from IPCC data.
Look at the table and do the arithmetic: 23,100/793,100 = 0.029.
URL for table: http://www.eia.doe.gov/oiaf/1605/archive/gg04rpt/pdf/tbl3.pdf
If one wanted to make fun of the alleged consensus of “climate scientists”, one could say that 97% of carbon dioxide molecules agree that global warming results from natural causes.
[UPDATE: Since I first made this post, Hockey Schtick has taken down their post due to pressure from the referenced paper’s authors. However, the chart shown above is still valid and supports the claim that only 3% of atmospheric CO2 comes from human sources. HockeySchtick will repost once it gets some answers from the author. Meanwhile, my post was submitted to and published by Anthony Watts’ WUWT blog and has received many comments. I apparently made the same mistake as on the Hockey Schtick: I took what the original paper’s author wrote, to be was she meant. There appears to be some misunderstanding between atmospheric concentration of CO2 and flux of sources and sinks for CO2. The WUWT article is here: