Not exact matches
To this end, they compare the
output of the models
against observations for present climate.
Models are often tuned by running them backwards
against several decades of
observation, this is much too short a period to correlate
outputs with
observation when the controlling natural quasi-periodicities of most interest are in the centennial and especially in the key millennial range.
For a complete discussion of this see Essex: https://www.youtube.com/watch?v=hvhipLNeda4 Models are often tuned by running them backwards
against several decades of
observation, this is much too short a period to correlate
outputs with
observation when the controlling natural quasi-periodicities of most interest are in the centennial and especially in the key millennial range.