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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
97 CESM 1_2_2_1 for cheyenne
by jedwards
April 24, 2017 - 2:20pm
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Community Bug Reporting
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769 B1850 case stopped after running about six hours
by chensheng@...
May 17, 2017 - 1:48am
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This forum is dedicated to informing the community of news related to CESM2.0 development.
3
3 yellowstone bug in cesm2 beta01 through beta04 performance issue
by jedwards
November 29, 2016 - 11:52am
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40 File missing
by asphilli
February 13, 2017 - 10:16am
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Includes requests for new features and configuration inquiries
618
1989 "forrtl: severe (174): SIGSEGV, segmentation fault occurred " with code that worked before
by yixisi1505@...
May 22, 2017 - 4:57am
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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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273
711 gen_domain on edison
by xzj102@...
April 20, 2017 - 8:50pm
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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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53 FAMIPC5 past 2005
by baisy@...
March 30, 2017 - 11:31am
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3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
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157
405 How to represent 26 hybrid levels (output from CAM3) in 26 pressure levels?
by wanlingfeng_123@...
May 21, 2017 - 9:33pm
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Tips and tricks for getting the best performance from CESM
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23 load balancing of I1850CLM45CN
by ncepulee@...
April 5, 2017 - 5:35am
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32
54 CESM1.2.2 MPT/MPI Error
by taylor.hughlett@...
April 25, 2017 - 1:06pm
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18 Annual mean insolation / zenith angle question (for an aqua planet experiment)
by 11438023@...
April 23, 2017 - 11:49pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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1176 CESM code for Cheyenne HPC
by xiaoyihf@...
May 18, 2017 - 6:31pm
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Forum for issues related to the new version control system
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37 what's the [password] for guestuser to download the CESM1.2.2 release code
by xiaoyihf@...
May 18, 2017 - 2:55pm
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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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46 eulerian dynamical core spectra cutoff
by kangwanying1992@...
April 24, 2017 - 6:41pm
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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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9 Gravity wave drag and residual circulation (or adiabatic heat rate)
by maartje.kuilman@...
September 8, 2016 - 10:51am
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37
108 CESM Runtime error, log and build files are erasing
by charan0239@...
April 1, 2017 - 5:31pm
 

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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21
77 amwg diagnostics does not produce the plots
by eerfani@...
March 2, 2017 - 6:38am
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29
87 spectral element core grid
by brose@...
May 3, 2017 - 4:31pm
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forum now closed - existing threads will eventually be moved to their appropriate forums
245
602 CESM branch run error
by navjit.sagoo@...
February 1, 2017 - 1:58pm
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28
59 Near-surface relative humidity in CCSM4 and CESM1 models
by kimmo.ruosteeno...
20 hours 30 min ago
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71
209 Annual Mean Insolation
by 11438023@...
April 23, 2017 - 11:43pm
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52
179 radiation calculations frequency: iradsw, iradlw
by 1475922792@...
April 27, 2017 - 2:01am
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115
540 CESM1 questions: a) F compset with data land; b) perpetual F compset run with time varying SST forcing
by kangwanying1992@...
March 10, 2017 - 9:28am
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206
794 Cam5-som
by 1475922792@...
April 27, 2017 - 1:40am
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123
340 Modifying Diurnal cycle of Insolation
by 11438023@...
May 3, 2017 - 3:19am
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43
98 SCAM History variables and Heat and Water Budgets
by olson
August 16, 2016 - 11:02am
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131
398 request for daily SST/ICE forcing file
by shineng.hu@...
April 18, 2017 - 9:50pm
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107
321 Nitrogen deposition from CAM
by shirleyxyliu@...
April 17, 2017 - 7:36pm
 

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
46 problem about long-term archiving
by yjgao5757@...
March 8, 2017 - 1:45am
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116
547 Simulation of an aquaplanet with WACCM
by luoyangcheng96@...
May 19, 2017 - 2:37am
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58
277 equilibrium state fro waccm
by mmills
March 22, 2017 - 7:13am
 

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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20 non-existent of input data
by bianqy@...
November 10, 2016 - 7:11pm
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Science Issues for The Chemistry Climate Working Group
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3 SOA simulation in CAM5
by pawanvats5086@...
October 26, 2015 - 12:19am
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Software and Run-time issues for the Chemistry Climate Working Group
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14 GEOS5 f09_f09 dataset
by navjit.sagoo@...
May 16, 2017 - 10:03am
 

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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7 Issue attempting to create set 1 with the lnd_diag4.2.28 package
by taylor.hughlett@...
November 18, 2016 - 2:50pm
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38
99 Temperature difference when using coupler output in IG run
by sacks
April 21, 2017 - 6:08am
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222 Details about "dynamic land use" files of CLM
by lichengwei09@...
April 27, 2017 - 4:16am
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312
967 Build error with point simulation in CESM 1.2.2
by sjc265@...
May 15, 2017 - 4:17pm
 

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
7
53 CISM config file - time varying input?
by l.n.vanderlaan@...
October 19, 2016 - 1:38am
 

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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12
25 question about 'za' unrecognized argument -grid_file
by hucq14@...
September 21, 2015 - 8:42pm
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6
8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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43
100 how to interpolate the B grid to C grid
by wenq@...
March 1, 2017 - 4:10am
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44
123 POP Exiting in deep glaciation simulations
by janezhang8587@...
April 2, 2017 - 4:53am
 

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
7 What aerosol species does CICE use?
by wenshanw@...
November 11, 2015 - 4:35pm
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3
4 FAQ: Albedo/Radiation Tuning in CESM-CICE
by dbailey
April 28, 2014 - 10:24am
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15
66 offline CICE model
by 18700937703@...
April 27, 2017 - 6:51pm
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22
92 vertical thermo error
by dbailey
May 9, 2017 - 9:19am
 

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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3
10 atmospheric CO2 used by radiative and by biogeochemical flux computations
by ludwig.lierhamm...
October 28, 2015 - 10:11am
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1
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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3 Paleoclimate Resources for CESM - Wiki on Github
by ottobli
February 5, 2016 - 2:57pm
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Input data inquiries for paleoclimate simulations
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86 where to get REFCASE (b40.850hf.1deg.001 and b40.lm850-1850.1deg.001) files and SST forcing file
by charan0239@...
February 28, 2017 - 9:35am
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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
15
54 orb_mvelp
by jalihal@...
July 3, 2016 - 5:33am
 

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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9
69 FAQ: Data ocean slab mode (DOCN-SOM)
by 1475922792@...
April 29, 2017 - 7:36am
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20
78 Output Slab Ocean Model history on pop grid
by zwang19@...
April 24, 2016 - 10:34pm
 

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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15
44 a question about wind stress reading in a CAIF case
by gaoyanqiujuly11...
May 30, 2016 - 8:11pm
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12
33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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