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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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89 GoogleCode Repositories are Offline PIO source not found
by sang-ki.lee@...
July 21, 2016 - 2:28pm
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Community Bug Reporting
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709 Building on Ubuntu - cesm-setup fails
by a.anukesh@...
1 day 2 hours ago
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CESM2.0 is scheduled to be released in December 2016. This forum is dedicated to informing the community of news related to CESM2.0 development.
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1 CESM2.0 Discontinued Support for ESMF Component Interfaces to Driver
by aliceb
June 24, 2016 - 11:18am
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5
31 problem running CVDP in parallel
by milena@...
August 5, 2016 - 3:18pm
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Includes requests for new features and configuration inquiries
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1815 Land not getting CO2 from atmosphere
by rosh.me91@...
1 day 19 hours ago
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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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251
661 Restart files for initilization of last 1000years (850-1850) transient run with the cesm1.2.2
by wanlingfeng_123@...
August 18, 2016 - 6:09am
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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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52 CCSM4 CMIP5 historical runs r1i1p1 r1i2p1 r1i2p2 r2i1p1 r6i1p1
by strandwg
June 11, 2016 - 2:55pm
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3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
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148
382 10m U and V components
by rbell@...
August 3, 2016 - 3:43pm
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Tips and tricks for getting the best performance from CESM
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20 Finding the best phys_loadbalance option in CAM
by mfwehner@...
August 22, 2016 - 3:40pm
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15
21 cesm.buildexe.csh failed, libhdf5_hl.so.8 not found
by adriant@...
July 22, 2016 - 10:24am
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14 Is it Possible to Run CAM-SE in Chemical Transport Mode?
by alan.m.rhoades@...
August 10, 2016 - 7:18pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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1132 Problem building CESM1.2.2 on pleiades
by jedwards
1 day 10 hours ago
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Forum for issues related to the new version control system
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36 Incomplete CESM Download Due to Missing Googlecode Paths
by rmokos@...
July 15, 2016 - 2:24pm
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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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43 ne5np4 SCRIPgrid required
by andreasb
August 17, 2016 - 7:45am
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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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7 How to fix salt in ocean model(cesm1.0)
by wenq@...
July 26, 2016 - 7:38pm
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35
102 PE layout questions
by 1461772131@...
August 18, 2016 - 12:11am
 

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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19
73 SWIFT
by xiaoyihf@...
May 30, 2016 - 7:03pm
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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
243
598 CESM F compset AMIP run problems
by rosh.me91@...
August 2, 2016 - 1:05am
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54 inquire on CAM5 system requirements
by aalauda@...
March 16, 2016 - 4:57pm
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204 Changing code radsw.F90 to output FDS FUS CAM5 RRTMG
by amatcaos@...
August 16, 2016 - 6:23am
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172 SSTICE_YEAR_ALIGN for align with months/weeks
by zwang19@...
August 16, 2016 - 2:21am
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525 pio error when building cesm1_2_2_CAMChem
by ihmn.zgz@...
1 day 4 hours ago
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194
771 prescribed bulk aerosol in CAM4
by shayingying@...
21 hours 48 min ago
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117
324 How do calculate the total SO2 emission (combine surf and elev input data)
by agilen.wang@...
August 13, 2016 - 4:45pm
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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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128
388 ncl scripts to create SST/ICE data files to drive an F compset using B compset history files
by hannay
5 hours 1 min ago
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98
289 observed tmin vs. modeled tmin for NV vs. CA
by bdmorri2@...
August 18, 2016 - 12:49pm
 

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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532 Version of interpic
by thomas.diehl@...
July 26, 2016 - 6:21am
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255 How to fix salt in ocean model
by mmills
July 27, 2016 - 7:37am
 

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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35
94 PFT transient simulate
by pengxiaoqing1987@...
July 21, 2016 - 8:46pm
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90
212 Surface ozone fluxes or concentrations?
by jad10d@...
July 14, 2016 - 11:17am
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285
918 Trouble with mkmapdata.sh for preparing mapping files for surface datasets for a regional CESM1.2.0-CLM4.5 simulation
by chakravorty.ani...
July 27, 2016 - 3:44am
 

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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50 Some ideas about CISM
by 18729351715@...
June 18, 2016 - 5:38pm
 

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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36
88 Barotropic Streamfunction
by mg3662@...
August 17, 2016 - 3:23pm
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42
117 Running POP2 with prescribed SST
by yikan302@...
May 5, 2016 - 10:16pm
 

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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14
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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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
23
85 changing land to ocean for fv core
by 2013asz8013@...
June 13, 2016 - 6:25am
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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
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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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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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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
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
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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