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Temperature and moisture responses of the AR4 models -- their implications for radiative feedbacks

PI: Rob Colman
Institution: Bureau of Meteorology Research Centre
Abstract:
The aim of this project is to investigate the responses of tropical and extra-tropical moisture and temperature profiles, and their implications for radiative feedbacks. A number of analysis approaches will be taken. One will consider differences in fields between models. Another approach will follow the important new method of Soden and Held (2006) (J.Climate, accepted), (which evaluated the feedbacks operating in the AR4 models), but will be based on radiative perturbations derived from a different model (that of the Australian Bureau of Meteorology Research Centre). Conventional clear sky and cloud radiative forcing 'feedbacks' will also be investigated. The project also aims to investigate possible sources of differences in feedback responses in models, focusing principally on water vapour and lapse rate feedbacks.
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