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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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43
107 CESM2.0.1 Release Now Available
by aliceb
August 8, 2018 - 5:39pm
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Community Bug Reporting
271
851 Bug RegCM-CLM
by marro.michele89@...
1 day 9 hours ago
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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
November 29, 2016 - 11:52am
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6
40 File missing
by asphilli
February 13, 2017 - 10:16am
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Includes requests for new features and configuration inquiries
742
2311 How to introduce water mountains in aqua-planet configuration of CAM at any desired location ?
by kamal.tewari1@...
September 20, 2018 - 1:27am
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This forum is for the discussion of git issues in the CIME repository
3
16 svn external for a given git tag
by andre
May 6, 2015 - 4:04pm
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295
746 reference for sst_rcp8.5 forcing file on cheyenne
by wanzi0411@...
September 4, 2018 - 12:23am
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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
18
60 Precipitation units
by snandini@...
June 5, 2018 - 2:18am
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2
3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
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165
427 NetCDF: Numeric conversion not representable
by marro.michele89@...
5 hours 21 min ago
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Tips and tricks for getting the best performance from CESM
23
29 CESM1.2.2 timing table for Cheyenne
by srogstad@...
August 6, 2018 - 10:38am
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71
172 Issue with Porting - `ERROR: Expected one child`
by satyarthn@...
September 17, 2018 - 1:03pm
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16
35 General advice on single column model version of aquaplanet simulations
by matthew.henry@...
June 28, 2018 - 8:47am
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Includes issues for building/running on supported machines and porting to unsupported machines
320
1218 How to create topography input file for CAM6.
by zhongshi.zhang@...
August 2, 2018 - 2:36am
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Forum for issues related to the new version control system
22
53 external download from dev branch failure
by henry.leroy.mil...
March 9, 2018 - 11:51am
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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.
15
50 access to /fis/cgd/cseg/csm/mapping/ files?
by ckuo@...
September 21, 2017 - 7:33pm
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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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9
11 adding new chemical reaction to Chemistry Preprocessor input file
by mmills
February 9, 2018 - 2:31pm
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41
124 Parallel Scalability of CESM
by veera.atmsc@...
January 17, 2018 - 5:56am
 

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@...
September 4, 2018 - 12:49pm
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29
87 spectral element core grid
by brose@...
May 3, 2017 - 4:31pm
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forum now closed - existing threads will eventually be moved to their appropriate forums
250
611 How to create topography input file for CAM6.
by zhongshi.zhang@...
August 2, 2018 - 2:33am
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29
60 Bug in CESM2.0.0 routine micro_mg2_0.F90
by mmills
July 16, 2018 - 1:35pm
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77
219 modification of 2 files with same name and placing in SourceMods?
by hannay
May 9, 2018 - 2:46pm
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55
187 How to add new namelist variables
by xiejinbo@...
July 17, 2018 - 7:52am
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122
565 FGEOS_C5SMAM_L40CN compilation error
by krc139@...
August 23, 2018 - 2:07pm
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224
840 prescribed bulk aerosol in CAM4
by tilmes
September 9, 2018 - 1:18pm
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126
347 Questions on physics_buffer
by hanyl16@...
September 17, 2018 - 2:13am
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46
105 SCAM in CESM2 --user-mods-dir ../../components/cam/cime_config/usermods_dirs/
by llin@...
July 9, 2018 - 9:18pm
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142
428 Volcanic aerosol mass mixing ratio
by krishmet@...
September 6, 2018 - 5:22am
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110
330 AODDUST from AODDUST1 and AODDUST3
by alexjt@...
May 15, 2018 - 10:03am
 

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
July 16, 2018 - 1:52pm
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124
593 Started a new case - Jobs failing
by mmills
July 6, 2018 - 1:37pm
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61
285 Total diabatic heating calculation in WACCM6
by yliang@...
August 8, 2018 - 10:57am
 

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
8
27 Known issues in CESM2.0 CAM-chem compsets
by mmills
September 5, 2018 - 1:23pm
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Science Issues for The Chemistry Climate Working Group
4
7 O3S and e90 tracers in CAM-Chem
by wu.ker.wang@...
June 21, 2018 - 9:38am
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Software and Run-time issues for the Chemistry Climate Working Group
9
15 settings for annually repeating initial conditions
by aditya.nalam@...
August 7, 2018 - 11:11am
 

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@...
November 18, 2016 - 2:50pm
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40
101 soil moisture capacity
by maisa@...
June 16, 2017 - 1:20pm
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111
244 error message of "too much NH4 uptake predicted by FUN"
by lxia@...
September 20, 2018 - 2:50pm
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336
1044 Running CESM2.0+CLM5 with idealized land mass
by mark@...
August 13, 2018 - 10:17am
 

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.
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7 What aerosol species does CICE use?
by wenshanw@...
November 11, 2015 - 4:35pm
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for general information regarding the sea ice component of CESM
5
6 FAQ: CICE4 to CICE5 initial files
by dbailey
September 13, 2017 - 2:11pm
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for fundamental sea ice science and modeling questions (not software)
15
64 ice: Vertical thermo error
by duvivier
September 13, 2017 - 1:59pm
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for issues encountered within the CESM coupled framework
26
110 CICE monotonicity error
by nitinpatil85@...
May 29, 2018 - 5:53am
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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.
1
2 finding the CICE Consortium
by duvivier
August 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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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
8
56 Enabling the GREGORIAN calendar in NOEVOLVE
by raeder
July 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@...
December 8, 2017 - 9:13am
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6
8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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50
117 how to activate "ciso" option in the ecosystem model?
by ekici@...
August 25, 2018 - 7:34am
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49
133 ocean tracer count problem
by ekici@...
August 1, 2018 - 4:12am
 

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@...
May 25, 2011 - 5:23am
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4
11 Why does time series for different atmospheric forcing produces similar behavior?
by galen.yacalis@...
July 8, 2018 - 7:28pm
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2
2 Error when spinup BGC
by 1751807240@...
May 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
February 5, 2016 - 2:57pm
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Input data inquiries for paleoclimate simulations
26
89 mk_grid_1x1.csh parameters
by ckuo@...
August 23, 2017 - 5:37pm
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Output data inquiries for paleoclimate simulations
9
25 Pleistocene (1975 and 1750 kyr) model output
by snandini@...
March 19, 2018 - 4:36am
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Paleoclimate Science Issues Forum
2
15 topography requirement in LGM
by 010022009074@...
May 12, 2015 - 7:33am
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Paleoclimate Software and Run-time issues
20
61 orb_mvelp
by snandini@...
May 8, 2018 - 7:29am
 

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@...
August 26, 2011 - 5:49am
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10
83 FAQ: Data ocean slab mode (DOCN-SOM)
by dbailey
August 1, 2018 - 9:54am
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22
86 Slab ocean gx3v7 grid issue
by shineng.hu@...
August 1, 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
March 14, 2006 - 9:23pm
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0 n/a
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1
2 how to change the ice layers (NOT ice categories)
by dbailey
February 1, 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
2 CESM2.0 ECT Test Results
by l.vankampenhout@...
1 day 6 hours ago
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Use this forum to discuss issues related to using the ECT tools.
0
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.

  Forum Topics Posts Last post
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5
7 About the ws input on pop
by wliu.ucsd@...
October 29, 2013 - 11:41am
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15
47 Offline MOC calculation
by afrigola@...
May 1, 2018 - 6:34am
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12
33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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