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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
100 GoogleCode Repositories are Offline PIO source not found
by bcd2653@...
February 16, 2018 - 4:06am
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Community Bug Reporting
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807 CAM output "VZ" error
by eaton
February 14, 2018 - 9:19am
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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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6
40 File missing
by asphilli
February 13, 2017 - 10:16am
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Includes requests for new features and configuration inquiries
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2139 Error running Spectral Element and Finite Volume dycores for 80 levels and PK Stratosphere
by ag4680@...
February 22, 2018 - 3:47pm
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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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287
736 Adding new molecule (OCS) to the initial state file
by mmills
February 9, 2018 - 2:35pm
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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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59 CESM1-CAM5 6-hourly output
by petisascom@...
December 13, 2017 - 1:12pm
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3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
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420 PM2.5 concentration from history files
by alcide.zhao@...
February 16, 2018 - 4:38am
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Tips and tricks for getting the best performance from CESM
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26 AVX / AVX2 / AVX512 / Intel Phi
by spamiad@...
February 15, 2018 - 8:17am
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51
122 porting CESM 1.0.6 to cheyenne
by shineng.hu@...
January 19, 2018 - 1:52pm
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14
33 Unexpectedly obtaining Axisymmetric Climatology in F09 Finite Volume dynamical | HS94 & PK02
by ag4680@...
February 15, 2018 - 11:37pm
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Includes issues for building/running on supported machines and porting to unsupported machines
317
1211 porting CCSM3 code from yellowstone to cheyenne
by xiaoyihf@...
1 day 19 min ago
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Forum for issues related to the new version control system
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52 external download from dev branch failure
by henry.leroy.mil...
1 day 9 hours 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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50 access to /fis/cgd/cseg/csm/mapping/ files?
by ckuo@...
September 21, 2017 - 7:33pm
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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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9
11 adding new chemical reaction to Chemistry Preprocessor input file
by mmills
February 9, 2018 - 2:31pm
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41
124 Parallel Scalability of CESM
by veera.atmsc@...
January 17, 2018 - 5:56am
 

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
79 SWIFT
by hannay
June 21, 2017 - 4:03pm
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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
247
604 run CESM1_2_0 in cheyenne with 'without calling MPI_Finalized()' error and abort job
by llin@...
September 5, 2017 - 11:10am
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28
59 Near-surface relative humidity in CCSM4 and CESM1 models
by kimmo.ruosteeno...
May 24, 2017 - 12:47am
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77
217 modification of 2 files with same name and placing in SourceMods?
by ckuo@...
November 10, 2017 - 4:16pm
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185 Multiple averaging periods for same variable
by jeyre@...
February 10, 2018 - 12:42pm
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119
552 problem with downloading missing data to build a case
by jedwards
February 6, 2018 - 1:44pm
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218
829 "Impossible case2 in instratus_condensate" in CAM5 under high CO2
by rneale
February 5, 2018 - 5:32pm
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124
343 Radiaitve properties and hyrgroscopic growth of sulphate aerosols
by krishmet@...
February 9, 2018 - 2:44am
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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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137
421 fixed GHG runs
by alcide.zhao@...
December 5, 2017 - 6:08am
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108
325 How are TS and SST computed in CAM?
by hannay
January 29, 2018 - 1:45pm
 

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
48 Please Read: Known problems and suggestions for running WACCM
by mmills
November 20, 2017 - 8:41pm
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119
570 WACCM crashed due to "DEPTH exceeding table value"
by bardeenc
February 12, 2018 - 11:17am
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282 WACCM with simplified chemistry and specified dynamics?
by daniele.minganti@...
September 11, 2017 - 3:09am
 

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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21 Known bugs in chemistry compsets
by mmills
November 20, 2017 - 8:46pm
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Science Issues for The Chemistry Climate Working Group
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4 sulfate chemistry in CAM5-Chem (CESM1.2.2)
by swang54@...
October 23, 2017 - 11:39am
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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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40
101 soil moisture capacity
by maisa@...
June 16, 2017 - 1:20pm
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105
235 looking for land model restart files (f09_f09 resolution, CLM 4.0 , CN biogeochemistry, F_2000_CN compset)
by climatemodelling@...
February 22, 2018 - 5:17pm
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331
1024 Problems with mkmapdata.sh while trying to set up a point scale run on CLM4.5 on cheyenne machine.
by ashutosh2203@...
February 16, 2018 - 5:20pm
 

CICE5 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. CICE 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. Future releases of CICE will be handed through the CICE Consortium.

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For questions related to looking at CESM-CICE output.
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7 What aerosol species does CICE use?
by wenshanw@...
November 11, 2015 - 4:35pm
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for general information regarding the sea ice component of CESM
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6 FAQ: CICE4 to CICE5 initial files
by dbailey
September 13, 2017 - 2:11pm
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for fundamental sea ice science and modeling questions (not software)
15
64 ice: Vertical thermo error
by duvivier
September 13, 2017 - 1:59pm
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for issues encountered within the CESM coupled framework
26
107 cice initial condition num records issue
by dbailey
February 19, 2018 - 3:03pm
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For CICE v6+ development including: bugs, diagnostics, testing, and future directions. Information about the CICE Consortium and model code can be found at https://github.com/CICE-Consortium.
1
2 finding the CICE Consortium
by duvivier
August 30, 2017 - 8:41am
 

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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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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13
26 CESM Python Post Processing tools on Cheyenne
by nburls@...
December 8, 2017 - 9:13am
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6
8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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48
111 which code contain the calculation of wind stress variable "TAUX/TAUY" in POP2 output history file?
by yaozhixiong@...
December 6, 2017 - 2:46am
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47
129 different pt_interior forcing file , but the same model result occur
by chensheng@...
November 29, 2017 - 6:49pm
 

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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89 mk_grid_1x1.csh parameters
by ckuo@...
August 23, 2017 - 5:37pm
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Output data inquiries for paleoclimate simulations
8
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
20
60 "Impossible case2 in instratus_condensate" in CAM5 under high CO2
by jiangzhu
January 12, 2018 - 1:44pm
 

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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11
81 FAQ: Data ocean slab mode (DOCN-SOM)
by 11438023@...
December 1, 2017 - 11:28am
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21
79 ERROR in data sizes for I1850SPINUPCN simulation
by taylor.hughlett@...
August 4, 2017 - 11:13am
 

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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15
45 Offline MOC calculation
by wanlingfeng_123@...
June 4, 2017 - 3:59am
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12
33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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