The carbon price: three months on
The UQ Risk and Sustainable Management Group, which I lead, held a small workshop last week, looking at early experience with the carbon price. We plan to produce an edited volume from it, to be published early next year. A few items of information that were new(ish) to me;
* There’s been a lot of work going on to tighten up estimates of climate sensitivity (conventionally measured as the equilibrium response to a doubling of CO2). The news on this front has been moderately good. The worst case catastrophes are less likely and stabilization at 475 ppm would give a 90 per cent chance of holding the global temperature increase to 2C or less. This is excellent news, since, as I’ve argued previously, it will be a lot easier to get to 475 than to the internationally agreed target of 450. We’re adding about 2ppm/year, so the extra 25ppm more or less offsets the decade of delay we’ve just experienced.
* Just by selecting the right breeding stock, we might be able to reduce methane emissions (belches and farts) from ruminants by around 30 per cent
* Soil carbon storage, much beloved of Opposition climate spokesman Greg Hunt and others, is (almost) a complete furphy