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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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41 CESM1.2.0 Release Announcement
by aliceb
June 12, 2013 - 11:52am
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308 output date error - monthly history files shifted 1 month
by eaton
3 hours 41 min ago
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262 CICE input data for B20TR?
by marvel1@...
3 hours 43 min ago
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202 start time
by hannay
May 22, 2013 - 2:02pm
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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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10 runoff_to_ocn
by cyoo@...
May 23, 2013 - 8:22am
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Includes issues for building/running on supported machines and porting to unsupported machines
175
519 Porting CESM 1.2.0 to Gordon@SDSC and Vesta@ANL
by hellyj@...
4 hours 23 min ago
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Includes requests for new features and configuration inquiries
193
458 More general MOC computation in POP
by afrigola@...
June 10, 2013 - 11:48am
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Forum for issues related to the new version control system
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20 CCSM4/CESM1_0 download problem
by sirajkhan78@...
March 4, 2011 - 5:06pm
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For discussion regarding the web based modeling tutorials
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13 Basic B_1850 Compilation
by sstrey2@...
June 4, 2013 - 9:10am
 

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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13 compilation error of CESM1.1
by jedwards
May 18, 2013 - 7:01am
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1 Air-sea fluxes
by eyulaeva@...
March 26, 2013 - 5:17pm
 

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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18
40 Slab ocean mode via data ocean.
by dbailey
May 17, 2013 - 11:46am
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73
290 problem during configuring
by eaton
May 31, 2013 - 11:26am
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116
369 CAM5 run time error
by murali@...
1 day 8 hours ago
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31
73 Using rad_diag with cam5-mam3 in cesm1.1.1
by eaton
June 13, 2013 - 8:06am
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21
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
226
551 Spin-up time for standalone CAM (F compset)
by jessica.liptak@...
June 6, 2013 - 11:20am
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92
209 stable water isotope module
by pengyb@...
May 12, 2013 - 7:48pm
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41
107 Forcing CLM with Atmospheric C13 Data
by eaton
March 28, 2013 - 10:16am
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59 Could single-column model be run through CESM?
by shanshans@...
June 5, 2013 - 2:41pm
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241 How to run off-line meteorology for CAM5
by fvitt
June 5, 2013 - 4:31pm
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78
218 Tg/yr NO from Lightning, calculated from molecules / cm3 / year
by beb83@...
June 6, 2013 - 1:37pm
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24 Running Diagnostics on personal computer
by gerald.potter@...
June 3, 2013 - 9:11am
 

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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14
21 Please Read: Known problems and suggestions for running WACCM
by santos
April 13, 2013 - 11:25am
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185 Advice on getting past WACCM crashes
by santos
April 13, 2013 - 10:37am
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10
33 Running simulations for 2020 to 2030
by santos
1 day 1 hour 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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1 CAMChem Bulletin Board
by tilmes
October 2, 2012 - 8:35pm
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Software and Run-time issues for the Chemistry Climate Working Group
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4 missing ice data
by mmills
May 28, 2013 - 4:33pm
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Science Issues for The Chemistry Climate Working Group
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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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25
83 How to create my own PFT data for the CLM
by xiaohardy@...
June 12, 2013 - 8:50pm
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180
629 The errors on using mksurfdata tool to create surface datasets
by xiaohardy@...
June 12, 2013 - 8:30pm
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48
131 Water balance issue
by slevis
May 13, 2013 - 11:55am
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1
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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6
7 POP2 run initialized with custom temperature/salt distribution
by herold.n@...
May 19, 2013 - 8:39am
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32 An issue that can cause POP2 to crash on restart
by rneely
May 6, 2013 - 10:45am
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10
22 increase ocean forcing
by asemenov@...
45 min 29 sec ago
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10
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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2
3 Interannual for ice-only, ocean-only, and coupled ice-ocean cases.
by dbailey
September 1, 2011 - 11:57am
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9
41 CESM 1.2 on Stempede problem
by xinmiao@...
June 13, 2013 - 5:35pm
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13 Example for course/student
by mahowald@...
May 8, 2013 - 9:30pm
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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
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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2
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
5
20 Interactive Chemistry
by nanr
June 3, 2013 - 2:35pm
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Output data inquiries for paleoclimate simulations
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4 sea surface temperature (SST) of the TRACE simulation
by ottobli
May 14, 2013 - 9:40am
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Paleoclimate Software and Run-time issues
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17 CCSM3 Paleoclimate Run Problem on Yellowstone
by taylor.hughlett@...
June 3, 2013 - 10:19am
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Paleoclimate Science Issues Forum
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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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8
21 slab ocean model problem with modified domain file - MOVED
by torbenmllr@...
May 24, 2013 - 12:43am
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3
4 FAQ: Data ocean slab mode (DOCN-SOM)
by dbailey
May 16, 2013 - 3:15pm
 

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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1
2 how to change the ice layers (NOT ice categories)
by dbailey
February 1, 2011 - 11:57am
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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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4
6 why my output files are put into trash
by wliu
July 21, 2010 - 9:47am
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11
32 "No Convergence" Error in POP
by afrigola@...
June 14, 2013 - 10:21am
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14
37 Offline MOC calculation
by younglan.shin@...
March 5, 2012 - 9:14am
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