Climate Variability Diagnostics Package for Large Ensembles (CVDP-LE)
The Climate Variability Diagnostics Package for Large Ensembles (CVDP-LE) developed by NCAR's
Climate Analysis Section is an
automated analysis tool and data repository for exploring internal and forced contributions to climate variability and change
in coupled model “initial-condition” Large Ensembles and observations.
The package computes a wide range of modes of interannual-to-multidecadal variability in the atmosphere, ocean and cryosphere,
as well as long-term trends and key indices of global and regional climate. Diagnostics include the ensemble-mean (i.e., forced response)
and ensemble-spread (i.e., internal variability) of each model, as well as quantitative metrics comparing the models to observations.
All diagnostics and metrics are saved to a data repository for later use and analysis.
The CVDP-LE User’s Guide provides general background on initial-condition Large
Ensembles, detailed documentation of all diagnostics and metrics in the package, and guidance on interpreting the results. Instructions
for downloading and running the CVDP-LE are provided on the Code page and
readme file, respectively.
The CVDP-LE can be applied to any suite of observational data, model simulations and time periods
specified by the user. A few examples of CVDP-LE applications to the CESM2 Large Ensemble, the
Multi-Model Large Ensemble Archive and the CMIP6 archive are linked below;
additional comparisons including netCDF files of CVDP-LE calculations can be found in the Data Repository.
When presenting results from the CVDP-LE in either oral or written form, please
Phillips, A. S., C. Deser, J Fasullo, D. P. Schneider and I. R. Simpson, 2020:
Assessing Climate Variability and Change in Model Large Ensembles: A User’s Guide to the “Climate Variability Diagnostics
Package for Large Ensembles”, doi:10.5065/h7c7-f961
We welcome your feedback and suggestions on any aspect of the CVDP-LE.
CVDP collaborators: Adam Phillips (software lead), Clara Deser (science lead), John Fasullo, Isla Simpson, and Dave Schneider, as well as other members of NCAR's Climate Analysis Section.
The NCAR Climate Variability Diagnostics Package for Large Ensembles, CGD Seminar Series, NCAR, Nov 2020