From: Sara Dal Gesso
Sent: 21 February 2011 17:45
Subject: EUCLIPSE radiation intercomparison
Dear EUCLIPSE friends and other interested modelers,
As discussed during the EUCLIPSE kick-off meeting in September 2010 in
Utrecht we promised to set up an intercomparison case for the radiation
codes used in the various climate models that participate in EUCLIPSE
WP1. The main objective is to quantify the intermodel spread in ToA
albedo for typical marine stratocumulus. Also radiation codes that are
used in LES models or as stand alone tools are more than welcome to
The case is based on observations of stratocumulus off the coast of
Africa over the Southern Atlantic Ocean. The runs are not costly, since
only a one-time step of the LES code and/or SCM version of a GCM is
required and a limited set of output data is asked. We propose a range
of cases with different Liquid Water Path (LWP), different options for
the microphysics, and different vertical resolutions. For further
detailed instructions, motivation and required output we refer to the
radiation intercomparison webpage.
Please let us know asap whether you will participate!
We require to receive the results before 31 March 2011 so that there will
be enough time to analyse the results before the CFMIP/GCSS/EUCLIPSE
meeting in June in Exeter.
Sara Dal Gesso, Pier Siebesma and Stephan de Roode