The IPCC’s ‘Representative Concentration Pathways’ are based on fantasy technology that must draw massive volumes of CO2 out of the atmosphere late this century, writes Nick Breeze – an unjustified hope that conceals a very bleak future for Earth, and humanity.
The IPPC (Intergovernmental Panel on Climate Change) published in their latest report, AR5, a set of ‘Representative Concentration Pathways’ (RCP’s).
These RCP’s (see graph, right) consist of four scenarios that project global temperature rises based on different quantities of greenhouse gas concentrations.
The scenarios are assumed to all be linked directly to emissions scenarios. The more carbon we emit then the hotter it gets. Currently humanity is on the worst case scenario of RCP 8.5 which takes us to 2°C warming by mid century and 4°C warming by the end of the century.
As Professor Schellnhuber, from Potsdam Institute for Climate Research (PIK) said, “the difference between two and four degrees is human civilisation.”
In 2009 the International Union of Forest Research Organisations delivered a report to the UN that stated that the natural carbon sink of trees could be lost at a 2.5°C temperature increase.
The ranges for RCP 4.5 and RCP 6 both take us over 2.5°C and any idea that we can survive when the tree sink flips from being a carbon sink to a carbon source is delusional.
Where does this leave us?
Of the four shown RCP’s only one keeps us within the range that climate scientists regard as survivable. This is RCP 2.6 that has a projected temperature range of 0.9°C and 2.3°C.
Considering we are currently at 0.85°C above the preindustrial level of greenhouse gas concentrations, we are already entering the range and as Professor Martin Rees says: “I honestly would bet, sad though it is, that the annual CO2 emissions are going to rise year by year for at least the next 20 years and that will build up accumulative levels close to 500 parts per million.”