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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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29
61 Invitation to participate in CESM integrated data search survey
by aliceb
June 15, 2015 - 6:14pm
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Community Bug Reporting
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625 CCSM3 run error
by janezhang8587@...
July 21, 2015 - 3:03am
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23 Possible mismatch detected between time specified in file name and file variables, setting array to missing
by judy@...
August 25, 2015 - 11:15pm
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Includes requests for new features and configuration inquiries
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1496 initialization error
by aditya.nalam@...
August 27, 2015 - 2:16am
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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
May 6, 2015 - 4:04pm
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207
555 map_fv0.9x1.25_to_T85_aave_110411.nc
by aliceb
July 30, 2015 - 11:43am
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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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47 Notice to the Community: ESGF Nodes Going Offline
by strandwg
June 21, 2015 - 10:36am
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2 user_nl feature request
by jedwards
August 14, 2014 - 4:18pm
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136
343 output history files reach too long
by spamiad@...
August 24, 2015 - 6:14am
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Tips and tricks for getting the best performance from CESM
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15 CAM5 Scalability on Edison/Yellowstone
by eaton
August 20, 2015 - 2:13pm
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0 n/a
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8 Error building SCAM
by benstephens@...
June 15, 2015 - 8:54am
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Includes issues for building/running on supported machines and porting to unsupported machines
275
1054 Porting cesm1.2.0, 'underscore' problems
by santos
August 17, 2015 - 12:22pm
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Forum for issues related to the new version control system
14
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.
9
36 plotting the CAM-SE grid
by hannay
June 22, 2015 - 3:15pm
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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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3 3D UV output
by zhangjkblue@...
February 3, 2015 - 8:47am
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81 CESM1_2_2 running issues of the beginner
by advita6@...
1 day 9 hours 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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15
67 Issue about using AMWG Diagnostics Package
by sjsprecious@...
April 27, 2015 - 11:45am
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75 Error when changing nlev for ideal-phys model
by santos
August 20, 2015 - 2:30pm
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forum now closed - existing threads will eventually be moved to their appropriate forums
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577 chunked structure
by eaton
July 30, 2015 - 11:26am
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21
50 TBOT in cam intial condition
by zarzycki
July 16, 2015 - 5:46pm
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59
169 adding heating in CAM4 fv dynamical core
by kangwanying1992@...
August 6, 2015 - 2:57pm
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43
152 How to add a new variable in mod_domfile
by yjin7@...
June 30, 2015 - 11:43am
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101
484 problem when building CESM1.2.2 on pleiades
by Yi-Hui.Wang@...
August 6, 2015 - 5:38pm
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181
735 the discrepancy of two almost identical run
by huihuojia@...
August 3, 2015 - 11:37am
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300 CAM 5 with SOA chemistry
by tilmes
August 28, 2015 - 7:46am
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40
92 Problems with Eulerian dycore over ocean
by i.h.h.karset@...
June 9, 2015 - 1:22am
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120
363 Using CAM-FV restart in CAM-SE
by nick.szapiro@...
August 11, 2015 - 2:33pm
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269 VQ = V*Q?
by shineng.hu@...
July 29, 2015 - 11:45am
 

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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23
43 Bug in "unofficial" versions of WACCM
by santos
August 24, 2015 - 1:22pm
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98
482 "solar parm" error
by mmills
August 24, 2015 - 12:01pm
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40
203 transient volcano forcing in WACCM
by mmills
August 28, 2015 - 2:45pm
 

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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14 chemistry package in CAM4 and CAM5
by liurj04@...
June 11, 2015 - 1:38am
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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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7 The error about surfacedata
by 1057398146@...
December 9, 2014 - 7:00am
 

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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31
84 CLM v3 working with gfortran compiler
by kishoreragi@...
August 23, 2015 - 8:17am
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73
172 change in soil water and root water stress in CLM4.5
by rosh.me91@...
August 20, 2015 - 1:09am
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256
820 creat map_1km-merge-10min_HYDRO1K-merge-nomask....data
by pengxiaoqing1987@...
1 day 15 hours 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
3
23 Using interpinic to set up a simulation which includes the land ice model
by sacks
March 3, 2015 - 5:02am
 

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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11
24 Question on default POP2 diagnostic on Yellowstone
by santos
August 17, 2015 - 12:19pm
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6
8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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29
76 block Indonesian throughflow
by yaozhixiong@...
December 27, 2014 - 1:40am
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37
109 How to NOT output the tavg files?
by whannah
June 24, 2015 - 3:35pm
 

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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2
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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20
82 CICE monotonicity error
by pdn@...
July 22, 2015 - 8:40pm
 

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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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.

  Forum Topics Posts Last post
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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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79 Where can I find the cesm_cami_create script?
by whannah
June 24, 2015 - 6:28am
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Output data inquiries for paleoclimate simulations
8
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
2
15 topography requirement in LGM
by 010022009074@...
May 12, 2015 - 7:33am
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Paleoclimate Software and Run-time issues
14
51 problem on generating rtm-to-ocn mapping files for deep time
by janezhang8587@...
11 hours 8 min ago
 

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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7
39 FAQ: Data ocean slab mode (DOCN-SOM)
by liurj04@...
June 14, 2015 - 5:46am
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15
40 SOM input data error
by dbailey
July 13, 2015 - 8:07am
 

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
 

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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14
43 HMXL mixed layer depth
by yaozhixiong@...
February 6, 2015 - 12:17am
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12
33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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