DiscussCESM Forums Information to include in help requests

Questions on CESM in general, or for which you are unsure of the correct forum. Please try to identify a more specific forum if possible.

Community projects including the Large Ensembles (LENS) and Last Millennium Ensemble (LME).

CIME, case control system, build and configure, machines and supporting scripts.

The CESM data models perform the basic function of reading external data, modifying that data, and then sending it to the driver via standard CESM coupling interfaces. The driver and other models have no fundamental knowledge of whether another component is fully active or just a data model. In some cases, data models are prognostic and also receive and use some data sent by the driver to the data model. But in most cases, the data models are not running prognostically and have no need to receive any data from the driver.

This forum is for technical and scientific questions related to running CESM with high resolution and variable resolution grids. Since many users are currently solving similar problems independently it is our hope that this forum will serve as a community resource where we can exchange ideas and experiences. With user input, we hope to compile a table of working configurations as well as document difficulties and solutions when running CESM with new grid configurations. We expect to cover the construction of grids/meshes, mapping files, and boundary data as well the configuration of component parameterizations and time step modifications specific to new grid resolutions.

The Paleoclimate Working Group contributes to the our understanding of climate change through hindcast simulations, comparing model results to data given forcings and boundary conditions (i.e. CMIP5 and PMIP3) and through sensitivity simulations to explore uncertainties in forcings. The working group is also involved in the development of modules for CESM for paleoclimate applications. Many paleoclimate modeling questions can be answered in the Paleo documentation. The Paleoclimate forum is intended for questions regarding implementation of forcings and boundary conditions specific to paleoclimate modeling.

The Community Atmosphere Model (CAM) is the atmosphere model component of the CESM. Information about running CAM as the atmospheric component of the CESM is found in the CESM2 release documentation. For information specifically on running CAM6, visit the CAM6 User's Guide. Please see the Whole Atmosphere Community Climate Model (WACCM) Forum and the Chemistry Climate (CAM-Chem) Forum for topic discussions specific to these capabilities of CAM.

Support of specific science objectives of the CESM and maintaining a state-of-the-art ocean component for the CESM as well as conducting related, but curiosity-driven, research leading to new contributions to the CESM community are the primary goals of the Ocean Model Working Group (OMWG). The former goals ensure that our working group, through CESM, fully contributes to science. The latter is absolutely necessary to keep the CESM at the leading edge of ocean climate models. This, of course, requires a continuous high level of effort and support. Information on the new ocean model component of the CESM can be found at http://www.cesm.ucar.edu/models/cesm1.0/pop2/

This forum is for technical and scientific questions related to MOM6, including but not limited to its use in CESM.

CICE5 is the latest version of the Los Alamos Sea Ice Model, sometimes referred to as the Community Ice CodE. It is the result of a community effort to develop a portable, efficient sea ice model that can be run coupled in a global climate model or uncoupled as a stand-alone ice model. It has been released as the sea ice component of the Community Earth System Model (CESM), a fully-coupled global climate model that provides simulations of the earths past, present and future climate states. CICE is supported on high- and low-resolution Greenland Pole and tripole grids, which are identical to those used by the Parallel Ocean Program (POP) ocean model. The high resolution version is best suited for simulating present-day and future climate scenarios while the low resolution option is used for paleoclimate simulations and debugging. Future releases of CICE will be handed through the CICE Consortium.

The CICE Consortium is a group of stakeholders and primary developers of the Los Alamos sea ice model (CICE), formed to maintain the current CICE model for existing and new users, to incorporate and maintain new research and development, and to accelerate scientific sea ice model development and its transfer into operational use. Sea ice modeling and development within the CICE Consortium. Details and documentation available at https://github.com/CICE-Consortium