Pattern decomposition of the transient climate response
Geoffroy, Olivier ; Saint-Martin, David
Année de publication
2014
A two-pattern decomposition of the mean surface air temperature response to an increase of CO2 is assessed. This decomposition is based on a two-layer global energy-balance model and the hypothesis of separability in space and time. It is shown that this decomposition allows the regional transient warming of a given atmosphere-ocean general circulation model to be well represented. The pattern decomposition is applied to 16 CMIP5 climate models and each of the two retrieved patterns - the equilibrium pattern and the pattern associated with the deep-ocean heat uptake - is described and discussed.
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