Climate Change
Individual model biases must be taken into account if
they are to be used for projecting future climates. This can be done by
comparing the values for the future climate with the results the model
produces for the present climate, rather than the observed values for the
present climate. This strategy assumes that if the model is biased in a
certain region in a certain month, then it may likely be biased similarly in
the results for the future climate. Subtracting the model simulations of
the present climate (1x CO2) from the 2x CO2 simulation reduces, if not
eliminates, the model bias.