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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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57 A discussion board for ocean and atmospheric modelers
by zdefne@...
March 21, 2014 - 6:51am
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412 cesm1.2 runtime error m_GlobalSegMap::initp_: non-positive value of ngseg error, stat =0 000.MCT(MPEU)::die.: from m_GlobalSegMa
by dingnan0701@...
1 day 19 hours ago
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CESM MIP simulations, including CMIP5
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11 Future Climate Indices
by brandi.clark@...
April 3, 2014 - 1:08pm
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367 Visualization of CAM restart field
by eaton
8 hours 56 min ago
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272 Where to download b40.20th.track1.1deg.008 restart file for 2050?
by phou@...
12 hours 6 min ago
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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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19 Generating Mapping Files in CESM 1.2 - share librariers error (libmpich.so.3)
by alan.m.rhoades@...
January 6, 2014 - 4:28pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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775 CESM 1.0.5 porting runtime issues
by jedwards
4 hours 51 min ago
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Includes requests for new features and configuration inquiries
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785 b40.1850.track1.2deg.003/b40.1850.track1.1deg.006 CESM tags
by hannay
April 17, 2014 - 11:01am
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Forum for issues related to the new version control system
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31 How to generate list of changes committed to a branch for inclusion in ChangeLog file?
by pjc@...
March 5, 2014 - 4:30pm
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For discussion regarding the web based modeling tutorials
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15 Basic B_1850 Compilation
by paekh@...
October 2, 2013 - 12:19am
 

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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38 error in running cesm1_0_4
by devarajun@...
April 11, 2014 - 1:14am
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2 Air-sea fluxes
by liufukaiouc@...
September 11, 2013 - 1:08am
 

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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45 Future non-hydrostatic plans for CAM?
by rneale
November 20, 2013 - 2:25pm
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390 CAM_CONFIG_OPTS
by santos
April 10, 2014 - 11:16am
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594 problem running CAM5 coupled with slab ocean model
by santos
9 hours 47 min ago
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109 chem_inparm surface values
by bates
1 day 5 hours ago
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62 Negative PHIS after spectral filtering by EUL dycore
by michael.veres@...
November 2, 2012 - 9:56am
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forum now closed - existing threads will eventually be moved to their appropriate forums
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558 running standalone cam5 with dice
by luchuhan@...
March 28, 2014 - 5:17pm
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244 prescribed aerosols in CAM4 and cam5
by andrew
April 10, 2014 - 1:11pm
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145 Changing the rotation of the planet
by bethproedrou@...
April 11, 2014 - 3:43am
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62 Variable not on iop initial file
by eaton
January 17, 2014 - 5:37pm
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302 How to run off-line meteorology for CAM5
by fvitt
5 hours 22 min ago
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221 T-tendency due to horizontal diffusion (DTH) in CESM1.0
by olson
March 26, 2014 - 3:24pm
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44 Running Diagnostics on personal computer
by dongshi.de@...
April 20, 2014 - 7:57am
 

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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24 Please Read: Known problems and suggestions for running WACCM
by santos
April 7, 2014 - 1:54pm
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343 Question on CTO3 and TAO3 in WACCM
by swahl@...
April 16, 2014 - 2:15am
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156 Emissions-Based Forcing of WACCM
by santos
6 hours 17 min 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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2 Known bugs in chemistry compsets
by tilmes
April 8, 2014 - 8:36am
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Software and Run-time issues for the Chemistry Climate Working Group
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6 download the MODEL CHEMISTRY EVALUATION PROGRAM (MCEP)
by shuai.zhu@...
March 12, 2014 - 4:32am
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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
 

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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87 convert CLM output to 1-D vector
by micah.wilhelm@...
February 28, 2014 - 8:22am
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707 CLM with additional PFTs
by slevis
April 2, 2014 - 1:19pm
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146 Why is my ground heat flux extremely overestimated?
by eiermann@...
March 12, 2014 - 8:31am
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2 averaging period for files in obs_data_2.3
by oleson
September 20, 2012 - 9:47am
 

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 Software and Run-time issues
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CISM Science Issues
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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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8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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74 problem about setting of RUN_STARTDATE in compsete CIAF for running from a particular year
by yaozhixiong@...
March 28, 2014 - 1:37am
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24
60 HOR_DIFF and VDC_T
by liufukaiouc@...
April 21, 2014 - 7:16pm
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19 how to calculate sea level rise
by ccsmwrf@...
January 19, 2013 - 1:27pm
 

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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3 Interannual for ice-only, ocean-only, and coupled ice-ocean cases.
by dbailey
September 1, 2011 - 11:57am
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56 Known issue with consistency check for tr_aero and ntr_aero
by aliceb
January 28, 2014 - 12:36pm
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24 changing sea ice albedo in a particular region
by rfeng@...
February 12, 2014 - 1:52pm
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1 Diagnostic package.
by dbailey
April 24, 2013 - 10:39am
 

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 restart in ecosystem model
by jjakacki@...
May 25, 2011 - 5:23am
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1 compilation aborted
by rrachmayani@...
March 6, 2009 - 1:51am
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7 E1850CN equilibrium simulations
by devarajun@...
February 3, 2013 - 9:51pm
 

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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46 problems running mk_remap
by maria.pivel@...
March 27, 2014 - 8:37am
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Output data inquiries for paleoclimate simulations
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8 annual primary history files
by nanr
March 14, 2014 - 4:21pm
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Paleoclimate Software and Run-time issues
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38 CESM 1.1 paleo initial conditions procedure
by flocolleoni@...
March 24, 2014 - 12:41pm
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Paleoclimate Science Issues Forum
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6 Huge sea-ice thickness
by flocolleoni@...
July 14, 2013 - 10:41am
 

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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34 slab ocean mode (SOM) combined with regionally prescribed SST ?
by zwang19@...
February 5, 2014 - 4:28pm
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14 Has anyone set up DATM to run with WFDEI forcing data?
by andyandy
January 16, 2014 - 4:00pm
 

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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2 how to change the ice layers (NOT ice categories)
by dbailey
February 1, 2011 - 11:57am
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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@...
October 29, 2013 - 11:41am
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33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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14
42 heat flux or heat convergence?
by liufukaiouc@...
April 15, 2014 - 5:05am
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