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The Community Earth System Model (CESM) is a fully coupled, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states.

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60 Release of the AMWG diagnostics: version amwg_diag_20140804
by hannay
August 7, 2014 - 9:16am
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Community Bug Reporting
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536 cam5 mam3 het rate missing
by tilmes
4 hours 58 min ago
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20 Sign of PDO
by asphilli
June 9, 2014 - 10:40am
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Includes requests for new features and configuration inquiries
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1093 cam5 bulk aerosol
by tilmes
4 hours 39 min ago
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456 memory requirement for mkmapdata
by sacks
1 day 6 hours ago
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Posted and Moderated by CSEG only
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0 n/a
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CESM MIP simulations, including CMIP5
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26 Precipitation units
by brandi.clark@...
August 8, 2014 - 5:54pm
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2 user_nl feature request
by jedwards
August 14, 2014 - 4:18pm
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119
305 Questions for TREFHT values at coastlines and T difference between history and restart files.
by fsche@...
15 hours 15 min ago
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Tips and tricks for getting the best performance from CESM
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1 Finding the best phys_loadbalance option in CAM
by jedwards
October 16, 2014 - 10:00am
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Includes issues for building/running on supported machines and porting to unsupported machines
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870 Create New Case for CESM 1.2.2 build.csh error
by aketh.tm@...
2 hours 32 min ago
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Forum for issues related to the new version control system
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32 How to generate list of changes committed to a branch for inclusion in ChangeLog file?
by sacks
November 12, 2014 - 8:08pm
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A place for questions about the ESMF mapping tools and the cprnc tool as well as any topics related to grid generation.
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19 Generating Mapping Files in CESM 1.2 - share librariers error (libmpich.so.3)
by alan.m.rhoades@...
January 6, 2014 - 4:28pm
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For discussion regarding the web based modeling tutorials
7
21 Basic B_1850 Compilation
by hannay
June 23, 2014 - 10:13am
 

CESM software is based on a framework, which divides the complete climate system into component models connected by a flux coupler.

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2 Air-sea fluxes
by liufukaiouc@...
September 11, 2013 - 1:08am
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45 Create New Case for CESM 1.2.2 build.csh error
by aketh.tm@...
2 hours 36 min ago
 

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 CESM release documentation. For information on CAM microphysics, visit the CAM Microphysics Development Group. Please see the Whole Atmosphere Community Climate Model Forum and the Climate Chemistry Forum for topic discussions specific to these capabilities of CAM.

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51 Fail to generate set2 plots
by hannay
October 24, 2014 - 10:39am
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64 Accessing SE grid corners in CAM physics
by eaton
November 3, 2014 - 8:54am
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forum now closed - existing threads will eventually be moved to their appropriate forums
232
570 potential temperature problem that crashes model in ice component
by bates
November 12, 2014 - 11:30am
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49 TBOT in cam intial condition
by huihuojia@...
July 14, 2014 - 9:53am
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161 adding heating in CAM4 fv dynamical core
by hazra.abheera@...
October 14, 2014 - 12:43pm
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139 user_nl_cam outside of $CASEROOT
by santos
November 24, 2014 - 11:26am
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453 Building CAM5.1 coupled with a slab ocean model in CESM1.0.3
by dengjiechun@...
2 hours 50 min ago
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158
623 resubmission does not work
by yjin7@...
November 21, 2014 - 9:10am
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276 what is the range supported by RRTMG in CAM5?
by jyangdas@...
November 19, 2014 - 7:53pm
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81 SCAM reads some IOP data at incorrect times
by raut@...
October 18, 2014 - 5:36am
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337 Specifying ice-line
by ruk15@...
November 13, 2014 - 12:47pm
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243 Plotting output from CAM run with "se" dycore on "ne" grid
by hannay
October 31, 2014 - 10:54am
 

The Whole Atmosphere Community Climate Model (WACCM) is a comprehensive numerical model, spanning the range of altitude from the Earth's surface to the thermosphere.

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34 WACCM supported grids
by mmills
November 12, 2014 - 4:48pm
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414 Segmentation fault tp_core.F90 running WACCM/CESM-DART 1.2.0
by gmodica@...
November 14, 2014 - 12:18pm
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186 Running WACCM for 'present day' case
by raeder
November 13, 2014 - 3:43pm
 

The goal of the Chemistry-Climate WG is to continue the development of the representation of chemical gas and aerosol species in the CESM and to further our understanding of the interactions between chemistry/aerosol and climate.

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General Announcements for the Chemistry Climate Working Group Forum
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2 Known bugs in chemistry compsets
by tilmes
April 8, 2014 - 8:36am
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Science Issues for The Chemistry Climate Working Group
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2 super_fast_llnl and create_newcase -list
by pjc@...
December 9, 2013 - 1:12pm
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Software and Run-time issues for the Chemistry Climate Working Group
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6 download the MODEL CHEMISTRY EVALUATION PROGRAM (MCEP)
by shuai.zhu@...
March 12, 2014 - 4:32am
 

The Community Land Model (CLM) is the land model for the Community Earth System Model (CESM). It is a collaborative project between scientists in the Terrestrial Sciences Section (TSS) and the Climate and Global Dynamics Division (CGD) at the National Center for Atmospheric Research (NCAR) and the CESM Land Model and Biogeochemistry Working Groups. Other principal working groups that contribute to the CLM are the Chemistry-Climate, Paleoclimate, Climate Variability and Change, and Land Ice Working Groups.

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1
2 averaging period for files in obs_data_2.3
by oleson
September 20, 2012 - 9:47am
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29
90 Recommendations for generating ICs
by nick.szapiro@...
September 29, 2014 - 4:14pm
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159 B1850CN spinup issue
by slevis
November 7, 2014 - 9:29am
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724 Building cesm case with PNETCDF enabled
by zhaol04@...
16 hours 37 min ago
 

The Land Ice Working Group (LIWG) was formed to develop and apply the ice sheet model component of CESM and to assess the role of land ice in climate change and sea-level rise.

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CISM General Announcements
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0 n/a
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CISM Science Issues
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2 LGM initial and config files
by fyke@...
November 20, 2014 - 6:54am
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CISM Software and Run-time issues
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5 CISM in CESM 1.1.2 not able to run in parallel
by sacks
June 25, 2014 - 8:30am
 

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/.

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19 how to calculate sea level rise
by ccsmwrf@...
January 19, 2013 - 1:27pm
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8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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76 Boussinesq coefficients for Buoyancy Calculations
by johnsonb
October 23, 2014 - 7:27am
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35
91 generate the ensemble members
by gaoyanqiujuly11...
November 24, 2014 - 2:09am
 

CICE4 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. CICE4 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.

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4 support for gx1v6 grid
by l.vankampenhout@...
August 11, 2014 - 2:36am
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4 FAQ: Albedo/Radiation Tuning in CESM-CICE
by dbailey
April 28, 2014 - 10:24am
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29 About changing SSTs field to study sea ice changes
by dbailey
October 1, 2014 - 3:29pm
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67 CESM 1.2 on Stempede problem
by aneeshcs@...
June 19, 2014 - 12:47am
 

Biogeochemistry, modeled in the CESM land model (CLM), and refers to the cycling of carbon and nitrogen through the plant / soil system and the interactions between these cycles as mediated by biological mechanisms of plants and soil heterotrophs.

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2 restart in ecosystem model
by jjakacki@...
May 25, 2011 - 5:23am
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2
7 E1850CN equilibrium simulations
by devarajun@...
February 3, 2013 - 9:51pm
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1 compilation aborted
by rrachmayani@...
March 6, 2009 - 1:51am
 

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 modelling 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.

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Paleoclimate General Announcements Forum
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2 CCSM4 simulation of the mid-Pliocene Warm Period paper published
by nanr
May 2, 2013 - 12:03pm
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Input data inquiries for paleoclimate simulations
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55 LGM,CCSM4:Forcing files
by nanr
September 4, 2014 - 3:55pm
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Output data inquiries for paleoclimate simulations
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24 SSTs and sea ice concentration fields from CCSM3 T85 x 1 last interglacial simulation
by strandwg
October 28, 2014 - 10:15am
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Paleoclimate Science Issues Forum
1
11 Huge sea-ice thickness
by 010022009074@...
October 23, 2014 - 2:21am
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Paleoclimate Software and Run-time issues
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43 High resolution F-compset deep time configuration
by bblack@...
May 8, 2014 - 10:06pm
 

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.

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1 run off
by jjakacki@...
August 26, 2011 - 5:49am
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25 FAQ: Data ocean slab mode (DOCN-SOM)
by kai.zhang@...
November 10, 2014 - 2:35pm
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37 Time in DATM forcing
by nick.szapiro@...
October 15, 2014 - 12:12pm
 

The Community Sea Ice Model (CSIM) is a dynamic-thermodynamic model that includes a subgrid-scale ice thickness distribution. This model is closely related to the Community Ice CodE (CICE) version 3.1.

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1 Welcome!
by dbailey
March 14, 2006 - 9:23pm
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1
2 how to change the ice layers (NOT ice categories)
by dbailey
February 1, 2011 - 11:57am
 

The CCSM version of the Parallel Ocean Program (POP) was released in June 2004 as part of the CCSM3.0 release. It is based upon POP Version 1.4.3, which was developed at Los Alamos National Laboratory. Support for the CCSM3.0 version of the model has expired in accordance with the CESM Support Policy.

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5
7 About the ws input on pop
by wliu.ucsd@...
October 29, 2013 - 11:41am
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42 heat flux or heat convergence?
by liufukaiouc@...
April 15, 2014 - 5:05am
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33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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