Climate Variability & Change
Working Group CVCWG


The goals of the Climate Variability and Change Working Group (CVCWG) are to understand and quantify contributions of natural and anthropogenically-forced patterns of climate variability and change. Towards that end, the CVCWG coordinates, conducts and archives simulations with CESM that are of broad interest to the national and international climate research communities. These simulations are designed to enable researchers to evaluate and understand mechanisms of internal variability and externally-forced change due to natural and anthropogenic factors, detection and attribution of past climate change, and projections and predictions of future change. These simulations can also serve as baselines for users who wish to perform their own pertubation experiments using the same model version. A complete list of CVCWG simulations available for public download via the Climate Data Gateway at NCAR is available here

Other CVCWG activities include development of the Climate Variability Diagnostics Package for Large Ensembles (CVDP-LE), the Climate Variability Diagnostics Package (CVDP) and Climate Data Guide, as well as contributions to the AGU CESM2 Virtual Special Issue and the CCSM4 and CESM1 Special Issues of the Journal of Climate.

Our Simulations

Recent / Notable

Past (organized by model version)


CSL Proposals

2018-2020 Proposal / Experiments | 2016-2018 Proposal / Experiments |
2014-20162012-2014 |  2011-2012 

CVCWG Liaison Information

Adam Phillips []

Gary Strand []

CVCWG Co-Chair Information

Dr. Isla Simpson
3/17/2020 - 3/16/2024
NCAR-CGD, P.O. Box 3000, Boulder, CO 80307-3000
303.497.1763 ]

Dr. Aixue Hu
1/1/2021 - 12/31/2022
NCAR/CGD/CCR, 3090 Center Green Drive, Boulder, CO 80307
303-497-1334 ]

Dr. Sarah Larson
3/17/2021 - 3/16/2023
North Carolina State University, Department of Marine, Earth & Atmospheric Sciences, Raleigh, NC 27695 ]