Yet another model which seems to indulge in circular argument – again.
The now discredited methodology of the 4th IPCC Asessment report will be used to produce model calculations for the 5th IPCC Asessment report and, I suppose the 5th will lead to the 6th and so on ad infinitum!
It seems like a methodology to ensure the keeping of climate modellers in work for ever.
Erich Roeckner, Marco A. Giorgetta, Traute Crueger, Monika Esch, Julia Pongratz. Historical and future anthropogenic emission pathways derived from coupled climate-carbon cycle simulations. Climatic Change, DOI: 10.1007/s10584-010-9886-6
According to Science Daily
The scientists used a new method with which they reconstructed historical emission pathways on the basis of already-calculated carbon dioxide concentrations. To do this, Erich Roeckner and his team adopted the methodology proposed by the International Panel on Climate Change (IPCC) for simulations being carried out for the future Fifth IPCC Assessment Report: earth system models that incorporate the carbon cycle were used to estimate the anthropogenic carbon dioxide emissions that are compatible with a prescribed concentration pathway. In this case, the emissions depend solely on the proportion of the anthropogenic carbon in the model that is absorbed by the land surface and the oceans. Repetition of the experiments using different pre-industrial starting dates enabled the scientists to distinguish between anthropogenic climate change and internal climate variability.
“It will take centuries for the global climate system to stabilise,” says Erich Roeckner.
And perhaps decades for the funding to continue.
The k2p blog 