Climate Simulations for the AR4

Climate model simulations for the next IPCC Assessment Report on the Impact of Climate Change to be issued in 2006 (sometimes referred to as the AR4, since it is the 4th in a series of such assessment reports by the Intergovernmental Panel on Climate Change) currently (February 2005) are being run. Equilibrium simulations, as discussed in the previous unit, give the "climate sensitivity" of the model (global mean warming in degrees C for a doubling of atmospheric CO₂). But a wider variety of transient climate runs are being made during this assessment cycle. These are listed in the following section.

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