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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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112 CESM2.1.1 CMIP6 Incremental Release now available
by aliceb
06/10/2019 - 3:39pm
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Posted and Moderated by CSEG only
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109 n/a
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Community Bug Reporting
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1113 ERROR in building the case (CESM2.1.1)
by mrostami@...
07/20/2019 - 2:46am
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This forum is dedicated to informing the community of news related to CESM2.0 development.
3
3 yellowstone bug in cesm2 beta01 through beta04 performance issue
by jedwards
11/29/2016 - 11:52am
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8
47 Ice Extent Timeseries not showing up
by bryamorihuela@...
12/04/2018 - 10:18am
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Includes requests for new features and configuration inquiries
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2597 Specify CAM initial files in a multi-instance CESM run
by sunjzh13@...
22 hours 14 min ago
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This forum is for the discussion of git issues in the CIME repository
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16 svn external for a given git tag
by andre
05/06/2015 - 4:04pm
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318
803 How CAM SCM IC can be created?
by bidyut@...
05/12/2019 - 2:09am
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CESM MIP simulations, including CMIP5
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73 Dust information in CMIP5 CESM1(CAM5)
by xiongfelin@...
04/12/2019 - 5:50am
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3 Improving search in DiscussCESM forum by using tags
by manojkc
09/01/2015 - 1:27am
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172
441 Looking for CESM2.1.1 AMIP (i.e. FHIST) restart files on Cheyenne
by yihsuan@...
07/18/2019 - 12:18pm
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Tips and tricks for getting the best performance from CESM
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35 Unexpected non-replicatable Segmentation Faults with CAM Dynamical Cores
by ag4680@...
04/30/2019 - 1:55pm
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105
273 cesm.exe terminates with signal 4
by botto@...
07/19/2019 - 8:59am
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63 HS94/PK02 Performance
by aph28@...
06/20/2019 - 2:04pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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1250 porting CCSM3 code from yellowstone to cheyenne
by heavens
07/19/2019 - 1:18pm
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Forum for issues related to the new version control system
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66 CESM 1_2_1 release version number different
by mpb20@...
11/21/2018 - 3:21pm
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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.
16
54 ./mkmapdata.sh
by umair@...
07/17/2019 - 3:49am
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For discussion regarding the web based modeling tutorials
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23 cesm_setup didn't form in the case file
by sunzhikuo14@...
07/05/2019 - 7:50pm
 

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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9
11 adding new chemical reaction to Chemistry Preprocessor input file
by mmills
02/09/2018 - 2:31pm
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168 hybrid run, end-of-file during read
by xyli@...
4 hours 40 sec 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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22
80 ERROR: remap transport: bad departure points
by praveenkumar.jrf@...
09/04/2018 - 12:49pm
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29
87 spectral element core grid
by brose@...
05/03/2017 - 4:31pm
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forum now closed - existing threads will eventually be moved to their appropriate forums
251
612 need your help
by 1036668667@...
07/10/2019 - 6:25pm
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29
60 Bug in CESM2.0.0 routine micro_mg2_0.F90
by mmills
07/16/2018 - 1:35pm
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78
221 changes in solar forcing & GHG concentration in CESM2.1.0
by chilukotinagara...
03/11/2019 - 8:56pm
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56
210 LBC vs. CO2 Flux File
by laubert@...
01/23/2019 - 8:17am
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123
572 enable COSP in CESM1.2.2
by deepashree.dutta@...
07/17/2019 - 3:13am
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229
873 CESM2.0/CAM6 crashing unexpectedly (shr_reprosum_calc error)
by inos@...
07/04/2019 - 3:38am
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130
358 Scaling factor for aerosol optical depth in CAM 6
by tc.chakraborty@...
06/28/2019 - 11:46pm
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48
110 Reproducing CESM radiation results in SCAM
by dsc254@...
07/13/2019 - 5:39pm
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145
443 ncl scripts to create SST/ICE data files to drive an F compset using B compset history files
by yh3019@...
06/15/2019 - 6:51pm
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338 Horizontal and vertical friction terms in CAM momentum equation
by zhangpengcheng@...
07/15/2019 - 9:14am
 

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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25
50 Known issues in CESM2.0 WACCM compsets
by mmills
07/16/2018 - 1:52pm
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128
605 WACCM-X crash at high solar activity - reduce time step?
by joemci@...
11 hours 1 min ago
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62
296 Running WACCM with rotation of the earth reversed
by regirock@...
03/05/2019 - 4:51pm
 

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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27 Known issues in CESM2.0 CAM-chem compsets
by mmills
09/05/2018 - 1:23pm
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Science Issues for The Chemistry Climate Working Group
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7 O3S and e90 tracers in CAM-Chem
by wu.ker.wang@...
06/21/2018 - 9:38am
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Software and Run-time issues for the Chemistry Climate Working Group
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17 Running FSDSSOA compset with meteorology input files from previous free-running F compset simulation
by aditya.nalam@...
04/17/2019 - 11:41am
 

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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3
7 Issue attempting to create set 1 with the lnd_diag4.2.28 package
by taylor.hughlett@...
11/18/2016 - 2:50pm
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41
137 soil moisture capacity
by maisa@...
06/16/2017 - 1:20pm
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116
267 Soil properties in single-point mode
by thiagods@...
05/30/2019 - 6:48am
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350
1108 error while using ./mkmapdata.sh
by umair@...
07/17/2019 - 3:34am
 

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.

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For questions related to looking at CESM-CICE output.
4
16 history time slice files error - ice diagnostic package
by caernani27@...
11/20/2018 - 3:22pm
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for general information regarding the sea ice component of CESM
5
6 FAQ: CICE4 to CICE5 initial files
by dbailey
09/13/2017 - 2:11pm
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for fundamental sea ice science and modeling questions (not software)
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72 CICE tracer dependency
by david.hebert@...
03/06/2019 - 12:19pm
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for issues encountered within the CESM coupled framework
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115 ice_ic ='none' Does not work
by s.l.bradley-1@...
03/12/2019 - 8:19am
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For CICE v6+ development including: bugs, diagnostics, testing, and future directions. Information about the CICE Consortium and model code can be found at https://github.com/CICE-Consortium.
7
19 finding the CICE Consortium
by duvivier
08/30/2017 - 8:41am
 

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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CISM Science Issues
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2 LGM initial and config files
by fyke@...
11/20/2014 - 6:54am
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CISM Software and Run-time issues
8
56 Enabling the GREGORIAN calendar in NOEVOLVE
by raeder
07/18/2018 - 9:33pm
 

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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13
26 CESM Python Post Processing tools on Cheyenne
by nburls@...
12/08/2017 - 9:13am
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6
8 new POP2 FAQ
by njn01
10/10/2013 - 10:04am
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51
120 why 14c pools are doubled in size?
by ekici@...
12/05/2018 - 4:11am
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50
135 offline pop2 tracer model
by jbladant@...
06/06/2019 - 4:33pm
 

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
2 restart in ecosystem model
by jjakacki@...
05/25/2011 - 5:23am
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4
11 Why does time series for different atmospheric forcing produces similar behavior?
by galen.yacalis@...
07/08/2018 - 7:28pm
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2
2 Error when spinup BGC
by 1751807240@...
05/31/2018 - 8:49pm
 

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
2
3 Paleoclimate Resources for CESM - Wiki on Github
by ottobli
02/05/2016 - 2:57pm
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Input data inquiries for paleoclimate simulations
27
114 mk_grid_1x1.csh parameters
by ckuo@...
08/23/2017 - 5:37pm
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Output data inquiries for paleoclimate simulations
11
30 CESM LGM ocean outputs
by mborreggine@...
07/16/2019 - 4:32pm
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Paleoclimate Science Issues Forum
2
15 topography requirement in LGM
by 010022009074@...
05/12/2015 - 7:33am
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Paleoclimate Software and Run-time issues
25
101 seq_domain_check atm/lnd domain error
by iccp.stein@...
07/09/2019 - 1:16am
 

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
1 run off
by jjakacki@...
08/26/2011 - 5:49am
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12
104 HOW TO add SST anomaly IN SLAB OCEAN MODEL(cesm1.0.6 E compset)
by dajianzheng@...
07/02/2019 - 2:32am
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22
86 Slab ocean gx3v7 grid issue
by shineng.hu@...
08/01/2018 - 7:21pm
 

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
1 Welcome!
by dbailey
03/14/2006 - 9:23pm
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1
2 how to change the ice layers (NOT ice categories)
by dbailey
02/01/2011 - 11:57am
 
Discussion related to use of the CESM Ensemble Consistency test and related tools.
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Use this forum to discuss ECT test results and how to handle test failures.
1
4 CESM2.0 ECT Test Results
by jedwards
01/15/2019 - 1:40pm
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Use this forum to discuss issues related to using the ECT tools.
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0 n/a
 

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@...
10/29/2013 - 11:41am
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15
49 heat flux or heat convergence?
by bowen.zhao@...
01/19/2019 - 1:35pm
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13
34 Error while running spcam2_0-cesm1_1_1
by tanmoy6106@...
10/02/2018 - 11:54pm
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