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9.12 EVALUATION OF CLIMATE-MODEL SIMULATIONS OF HIRS WATER-VAPOUR CHANNEL RADIANCES
 

Summary: 9.12 EVALUATION OF CLIMATE-MODEL SIMULATIONS OF HIRS
WATER-VAPOUR CHANNEL RADIANCES
Richard P. Allan* and Mark A. Ringer
Hadley Centre for Climate Prediction and Research
Met Office, Bracknell, Berkshire, UK
1. INTRODUCTION
The response of the climate system to an
external forcing, such as increasing greenhouse gas
concentration, is strongly modulated by feedbacks
due to water vapour and cloud, both of which are
intrinsically linked to relative humidity. Therefore, it is
crucial that relative humidity and its variability are
accurately represented in climate models. It is
generally believed that the strong positive water
vapour feedback predicted by models is robust, and
approximates to the feedback experienced for fixed
relative humidity (Ingram 2002; Soden et al. 2002).
However, it has yet to be adequately demonstrated
that this approximation applies on decadal timescales
to water vapour in the free troposphere (e.g. Sun and

  

Source: Allan, Richard P. - Department of Meteorology, University of Reading

 

Collections: Geosciences