Tag Archives: Climate Sensitivity

CO2 Global Warming

It is often said that the science behind CO2 enhanced global warming is simple  and settled. However, calculating the top of the atmosphere ‘radiative forcing’ of CO2 is really not that straightforward at all. First you need to assume an initial … Continue reading

Posted in AGW, Climate Change, climate science, IPCC, Physics | Tagged , | 20 Comments

The Logical Fallacy behind ‘Representative Concentration Pathways’

Representative Concentration Pathways (RCPs) used in AR5 are future projections of greenhouse emissions according to different mitigation scenarios. So for example  there is a ‘business as usual’ high emission scenario (RCP8.5) and a midrange mitigation emissions scenario (RCP4.5). CMIP5 model projections are … Continue reading

Posted in AGW, Climate Change, climate science, IPCC, Science | Tagged , , | 6 Comments

The strange case of TCR and ECS

In this post we consider the strange coincidence that the net forcing used by CMIP5 models is essentially the same as CO2 forcing alone. This allows us to derive a value of TCR(Transient Climate Response) just from observational data.  Measuring … Continue reading

Posted in AGW, Climate Change, climate science, Science | Tagged , , , | 25 Comments