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Chemistry-Climate Model Validation Activity for SPARC (CCMVal) |
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Scope:
SPARC has
established the Chemistry-Climate
Model
Validation Activity (CCMVal) for coupled
chemistry-climate models
(CCMs). The goal of CCMVal is to
improve understanding of Chemistry-Climate Models (CCMs) and their
underlying GCMs (General Circulation Models) through process-oriented
evaluation, along with discussion and coordinated analysis of
science results. One outcome of this effort is expected to be
improvements in how well CCMs represent physical, chemical, and
dynamical
processes. In addition, this effort will
focus on understanding the ability of CCMs to reproduce past
trends and
variability and providing predictions from ensembles of long model runs. Achieving these goals will involve comparing CCM
constituent distributions with (robust) relationships between
constituent
variables as found in observations. This effort is both a model-model
and
model-data comparison exercise. Key
diagnostics
with respect to
radiation, dynamics, transport, and stratospheric chemistry and
microphysics
are defined in the CCMVal
Evaluation Table.
This approach allows modelers to decide (based on their own priorities
and
resources) which diagnostics to examine in any particular area. The
CCMVal
activity helps coordinating and organizing CCM model efforts around the
world. In
this way, the CCM community can provide the maximum
amount of useful scientific information for WMO/UNEP and IPCC
assessments. Achieving
these goals requires extensive comparisons and evaluations of a wide
range of
output from a large number of Chemistry-Climate Models (CCMs). This model output is being stored in the
CCMVal archive at the British Atmospheric Data Centre (BADC)
for the convenience and necessity of CCMVal activities conducted by
investigators associated with the participating modeling groups. The
CCMVal activity and model groups are interested in allowing
investigators
outside of the CCM community to have access to the model archive for
the
purposes of scientific research and furthering the goals of the CCMVal
activity. Those
wishing to use the output from CCMVal model runs are requested to
become formal
"CCMVal Collaborators" and to follow the Guidelines
for CCMVal Collaborators. If you want to receive CCMVal announcements, please subscribe to the CCMVal mailing list by filling out the form at http://www.jiscmail.ac.uk/ccmval. |
Last modified: 22 July 2009 |
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by Veronika
Eyring |