This website uses cookies. By continuing to use this website you are agreeing to our use of cookies. 



CCMVal-1: University of Leeds UMSLIMCAT model output contribution to the WMO 2006 REF1 experiment

Update Frequency: Not Planned
Latest Data Update: 2007-01-16
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2014-08-15
Download Stats: last 12 months
Dataset Size: 94 Files | 2GB


CCMVal was a large international effort 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. The first round of CCMVal (CCMVal-1) evaluated only a limited set of key processes in the CCMs, focusing mainly on dynamics and transport.

This dataset contains UMSLIMCAT model output from the WMO 2006 REF1 experiment run by the University of Leeds.

Citable as:  Chipperfield, M.; Tian, W. (2014): CCMVal-1: University of Leeds UMSLIMCAT model output contribution to the WMO 2006 REF1 experiment. NCAS British Atmospheric Data Centre, date of citation.
Abbreviation: Not defined
Keywords: CCMVal, climate, model, CCM's, GCM's


Previous Info:
No news update for this record
Previously used record identifiers:
Access rules:
Restricted data: please submit an application using the REQUEST ACCESS link for access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

CCMVAL-1 data were converted from original model format to ASCII by the modelling teams.

File Format:
Data are ASCII formatted

Process overview

This dataset was generated by the computation detailed below.

SLIMCAT model deployed on Leeds computer


SLIMCAT model deployed on Leeds computer. SLIMCAT was a three-dimensional (3D) off-line chemical transport model (CTM). The model used winds and temperatures from meteorological analyses (e.g. from the UK Met Office or ECMWF) to specify the atmospheric transport and temperatures and calculates the abundances of chemical species in the troposphere and stratosphere. The model had the option of detailed chemical scheme(s) for the stratosphere and troposphere.

The model can be used to simulate the past and current atmosphere, help interpret observations, and to diagnose the extent of problems such as stratospheric ozone depletion or tropospheric pollution. This model was developed at the University of Leeds, UK.

== Introduction ==

Around 1995 Martyn Chipperfield (University of Leeds) wrote SLIMCAT. This was a stratosphere-only version of TOMCAT formulated on isentropic levels. At this time TOMCAT became a 'tropospheric' model and various people in Cambridge helped to add treatments of e.g. convection, boundary layer mixing, and tropospheric chemistry. Recently, SLIMCAT has been extended downwards to include the troposphere. As the two former models were so similar, it made maintenance/development easier to merge TOMCAT and SLIMCAT into a single library with a choice of vertical coordinate (and other things), so that one model covers all of the applications. Depending on the coordinate use, the model is still referred to as TOMCAT or SLIMCAT.

=== Key Details ===

- Variable resolution. Typical resolutions are 5 x 5 degrees for multiannual runs to up to 1 x 1 degree.
- Forced by meteorological analyses, usually ECMWF and sometimes UKMO.
-Options of detailed stratospheric or tropospheric chemistry schemes.
- Written in Fortran (f77, f90). Runs on most platforms (including vector machines). Parallelised using OpenMP and MPI.

Input Description


Output Description


Software Reference


No variables found.

Temporal Range
Start time:
End time:
Geographic Extent