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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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592 pio build too slowly
by zdliu@...
1 day 9 hours 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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1381 ERROR: LVD not found, all data is after yearLast
by yingli@...
22 hours 2 min ago
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535 Any one know what years are used to create the Hurrell SST climatology file?
by 1062628489@...
April 16, 2015 - 7:18am
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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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40 Dust information in CMIP5 CESM1(CAM5)
by mahowald@...
April 10, 2015 - 9:18am
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2 user_nl feature request
by jedwards
August 14, 2014 - 4:18pm
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126
320 Clear-Sky Aerosol Optical Depth
by thibaut.lurton@...
April 14, 2015 - 8:48am
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Tips and tricks for getting the best performance from CESM
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6 What is the best PE layout configuration for an all active component run?
by jedwards
April 2, 2015 - 2:58pm
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3 Idealised aquaplanet setup: Uniform slab ocean depth, no q-fluxes
by brianpm
March 9, 2015 - 12:00pm
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Includes issues for building/running on supported machines and porting to unsupported machines
270
1014 Probem with ./create_newcase after defined my own machine
by jedwards
April 16, 2015 - 7:15am
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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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33 mkmapdata.sh with userdefined SCRIP file
by spamiad@...
March 13, 2015 - 11:06am
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For discussion regarding the web based modeling tutorials
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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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74 Error occured when using CCSM output as atmospheric forcing to run CLM
by zhu467@...
April 4, 2015 - 11:33pm
 

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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53 Diagnostics required_vars and Master list
by eaton
March 11, 2015 - 1:02pm
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23
65 different grids in the same modelling
by fabrice.jegou@...
February 27, 2015 - 2:23am
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forum now closed - existing threads will eventually be moved to their appropriate forums
233
571 Dust direct radiative effect in CAM4
by shineng.hu@...
March 5, 2015 - 8:56am
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49 TBOT in cam intial condition
by huihuojia@...
July 14, 2014 - 9:53am
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167 Changing the rotation of the planet
by agya0509@...
January 16, 2015 - 6:30am
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149 user_nl_cam outside of $CASEROOT
by wagmanbe@...
January 27, 2015 - 12:45pm
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457 Problem building with COSP in CESM1.0.6
by santos
December 3, 2014 - 1:00pm
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171
681 Trying to run CESM/CAM5 with chempkg = 'none'
by mmarcella@...
April 16, 2015 - 7:26am
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284 Questions on physics_buffer
by drosa@...
February 20, 2015 - 6:42pm
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86 CLM: landmask not on dataset
by drosa@...
April 16, 2015 - 12:26pm
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349 An emission data problem about CAM
by tilmes
April 2, 2015 - 8:23am
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255 Question about CAM_chem and the AMWG Diagnostics Package_v140804
by tilmes
March 23, 2015 - 4:51pm
 

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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41 How to change SST in WACCM?
by kangwanying1992@...
February 25, 2015 - 4:11pm
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449 Runtime error in pio, pleiades-san, 1.2.2
by netsanet.kassa@...
3 hours 24 min ago
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195 LBC vs. srf_emiss
by thibaut.lurton@...
1 day 22 hours ago
 

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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11 How to get RUN_REFCASE for branch run
by tilmes
March 15, 2015 - 8:33pm
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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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28
78 MOAR atmospheric forcing data on Yellowstone
by manoj.kc@...
1 hour 49 min ago
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70
166 undefinitely growing snow depth in CLM4.5 BGC spinup
by matteo.zampieri@...
April 10, 2015 - 7:39am
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788 Problems about crop irrigation when using CLM4.5BGC
by zhu467@...
April 15, 2015 - 3:04pm
 

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
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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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30
77 block Indonesian throughflow
by yaozhixiong@...
December 27, 2014 - 1:40am
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92 POP Exiting in deep glaciation simulations
by gaoyanqiujuly11...
November 27, 2014 - 11:34pm
 

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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18
72 -res T62_g16 -compset G doesn't work?
by bluthgen@...
April 9, 2015 - 4:55am
 

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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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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76 clm input: ldomain cesm1.1
by nanr
February 2, 2015 - 4:49pm
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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
12 topography requirement in LGM
by 010022009074@...
1 day 16 hours ago
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Paleoclimate Software and Run-time issues
12
44 Last Millennium simulation with CESM1.2.1
by hucq14@...
April 14, 2015 - 2:09am
 

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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31 FAQ: Data ocean slab mode (DOCN-SOM)
by dbailey
February 25, 2015 - 7:36pm
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14
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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0 n/a
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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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