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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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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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1478 inputs and outputs for atm and ocn in a coupled model
by yaozhixiong@...
5 hours 32 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
May 6, 2015 - 4:04pm
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206
552 Invalid dimension ID or name when reading USGS-gtopo30_x
by jihwang@...
July 24, 2015 - 10:41am
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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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341 output file format
by aditya.nalam@...
July 26, 2015 - 11:51pm
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Tips and tricks for getting the best performance from CESM
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13 Optimal Performance of CESM Run on NERSC Edison
by jihwang@...
July 14, 2015 - 12:19pm
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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
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1039 mct build failes
by spamiad@...
June 17, 2015 - 9:37am
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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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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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76 Problem in building command CESM1.2.2
by rosh.me91@...
June 9, 2015 - 2:33am
 

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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67 Issue about using AMWG Diagnostics Package
by sjsprecious@...
April 27, 2015 - 11:45am
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66 change CAM3 to be adapted for Mars' Atmosphere
by richf@...
July 13, 2015 - 11:44am
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forum now closed - existing threads will eventually be moved to their appropriate forums
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574 prescribed dust in coupled simulations
by hannay
June 23, 2015 - 1:39pm
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21
50 TBOT in cam intial condition
by zarzycki
July 16, 2015 - 5:46pm
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168 Change latent heat flux at a specific region
by yjin7@...
15 hours 5 min ago
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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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479 CESM-1.2.2 porting error
by ankush.hindustan@...
July 25, 2015 - 10:57pm
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180
732 Dramatic cooling with B_1850 simulation
by whannah
July 23, 2015 - 9:10am
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288 liqflgsw, iceflgsw and inflgsw in RRTMG_SW for cloud optics parameterization
by 1475922792@...
May 23, 2015 - 12:12am
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92 Problems with Eulerian dycore over ocean
by i.h.h.karset@...
June 9, 2015 - 1:22am
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119
362 modifying the input data
by hannay
July 22, 2015 - 9:54am
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266 Question about CAM_chem and the AMWG Diagnostics Package_v140804
by YUQIANGZ@...
July 23, 2015 - 10:27am
 

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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42 How to change SST in WACCM?
by hannay
May 5, 2015 - 10:03am
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98
481 using PORT (offline radiative transfer tool) on WACCM output
by santos
July 10, 2015 - 10:00am
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37
198 Mesospheric heating rates (FWSC)
by mmills
May 22, 2015 - 1:59pm
 

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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82 CLM4 surface dataset (vegetation)
by 147271@...
July 24, 2015 - 2:24am
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71
170 undefinitely growing snow depth in CLM4.5 BGC spinup
by matteo.zampieri@...
May 20, 2015 - 7:18am
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252
809 Forcing temporal alignement
by spamiad@...
July 13, 2015 - 9:12am
 

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@...
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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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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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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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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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.

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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
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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
2
15 topography requirement in LGM
by 010022009074@...
May 12, 2015 - 7:33am
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Paleoclimate Software and Run-time issues
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50 Deep time simulation, error of generating the 'raw' land surface datafiles
by janezhang8587@...
June 22, 2015 - 8:03am
 

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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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.

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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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