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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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37
86 1950 initial conditions
by w_xuej@...
April 21, 2016 - 3:58am
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Community Bug Reporting
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691 pio error (cesm1_2_2)
by jedwards
9 hours 7 min ago
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28 Has anyone run CVDP for the CESM LE control simulation?
by fyke@...
September 8, 2015 - 12:53pm
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Includes requests for new features and configuration inquiries
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1742 create_production_test: GENERATE_BASELINE error
by thilton@...
April 27, 2016 - 10:47am
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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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242
643 Input file for ne60np4 Spectral Element Simulations missing
by 2013asz8013@...
1 day 11 hours ago
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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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50 FAMIPC5 past 2005
by edyer@...
April 22, 2016 - 6:32am
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3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
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376 LWup passed from CLM to CAM disagreement
by eaton
April 25, 2016 - 8:53am
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Tips and tricks for getting the best performance from CESM
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18 Running the low-resolution CCSM3 / CESM 1.2 on a Linux workstation
by cstappert@...
1 day 11 min ago
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8 mpif90 compiling issue on Linux when doing running build
by radek.lonka@...
April 20, 2016 - 6:09am
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11 FIDEAL
by jihwang@...
October 21, 2015 - 1:31pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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1097 run speed too slow using cesm 1.2.2
by 11438023@...
March 16, 2016 - 7:45pm
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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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42 Generating Mapping Files in CESM 1.2 - share librariers error (libmpich.so.3)
by haiyutianfeng74@...
March 31, 2016 - 7:54pm
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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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5 Running CLM4.5 with CAM5 at higher resolution
by rosh.me91@...
January 27, 2016 - 5:15am
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33
100 Freshwater hosing
by matthew.thomas@...
April 1, 2016 - 2:32pm
 

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
72 Atmospheric Diagnostics for data on HPSS
by mg3662@...
March 14, 2016 - 10:27am
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86 PV pertubation
by zhangjkstrato@...
February 18, 2016 - 12:02am
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forum now closed - existing threads will eventually be moved to their appropriate forums
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587 WACCM with pop2 and prescribed chemistry
by hspark1@...
November 11, 2015 - 12:25am
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54 inquire on CAM5 system requirements
by aalauda@...
March 16, 2016 - 4:57pm
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192 adding atmospheric heating
by nirupam.ju@...
March 30, 2016 - 12:38am
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169 How to add new namelist variables
by wagmanbe@...
April 6, 2016 - 2:26pm
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496 Get compiling error by only copying sst_data.F90 into /SourceMods
by xiejinbo@...
March 21, 2016 - 4:39am
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194
769 Problem running Parallel Offline Radiative Transfer (PORT) for feedback analysis using CAM5/CESM1.2
by ranfeng
April 24, 2016 - 6:34pm
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115
319 specifying methane emissions
by mvparke@...
April 21, 2016 - 2:42pm
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42
96 SCAM netcdf pio crash
by jet
November 20, 2015 - 3:54pm
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382 question about SST/ICE dataset for CAM run
by dwhittle@...
April 8, 2016 - 1:45pm
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286 Reproducing: f40.1979_amip.track1.2deg.001
by hannay
April 29, 2016 - 10:12am
 

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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43 Bug in "unofficial" versions of WACCM
by santos
August 24, 2015 - 1:22pm
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531 WACCM's aurora module
by thibaut.lurton@...
April 28, 2016 - 3:28am
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248 Momentum flux output
by caob@...
February 16, 2016 - 1:47pm
 

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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16 non-existent of input data
by holthaum@...
January 21, 2016 - 5:38am
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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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8 necessity of cold start
by chakravorty.ani...
January 28, 2016 - 12:28am
 

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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2
4 Detailed guide for lnd_diag for creating non-standard variable lists from daily history lnd output files
by oleson
September 14, 2015 - 2:44pm
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89 Changing initial condition soil moisture in CLM
by kdagon@...
April 28, 2016 - 3:57pm
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193 QRUNOFF versus the sum of QDRAI, QOVER, and QRGWL
by jsmankin@...
April 26, 2016 - 9:22pm
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276
897 run time issue in AMIP type run with soil moisture climatology
by Sanjiv.Kumar@...
April 18, 2016 - 9:18am
 

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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34 Some ideas about CISM
by sacks
April 14, 2016 - 8:02pm
 

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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8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
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83 Error while computing MOC using partial bottom cells
by huili7@...
March 1, 2016 - 9:28pm
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116 Domain decomposition and setting initial tracer's in POP
by aketh.tm@...
April 25, 2016 - 4:07am
 

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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7 What aerosol species does CICE use?
by wenshanw@...
November 11, 2015 - 4:35pm
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4 FAQ: Albedo/Radiation Tuning in CESM-CICE
by dbailey
April 28, 2014 - 10:24am
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55 CICE SSTDATA mode: updating sea ice fraction and SST for the next time step
by dbailey
March 4, 2016 - 11:23am
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20
85 Regional Configuration
by lettie.roach@...
March 10, 2016 - 2:03pm
 

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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10 atmospheric CO2 used by radiative and by biogeochemical flux computations
by ludwig.lierhamm...
October 28, 2015 - 10:11am
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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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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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84 CESM1 Paleo Users Guide
by heavens
January 28, 2016 - 4:16am
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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
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52 Simulation of LGM using CESM 1.2 "F" compset
by midhun.ndr@...
1 day 8 hours ago
 

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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7
40 FAQ: Data ocean slab mode (DOCN-SOM)
by liufukaiouc@...
March 16, 2016 - 12:06am
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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 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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14
43 HMXL mixed layer depth
by yaozhixiong@...
February 6, 2015 - 12:17am
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33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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