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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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90 GoogleCode Repositories are Offline PIO source not found
by enver.ramirez@...
October 20, 2016 - 10:50am
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Community Bug Reporting
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735 CESM with COMP_INTERFACE=ESMF compilation failing
by jedwards
November 28, 2016 - 7:23am
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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.
3
3 yellowstone bug in cesm2 beta01 through beta04 performance issue
by jedwards
November 29, 2016 - 11:52am
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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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1902 About U10 (10m wind) from CAM output
by huili7@...
December 6, 2016 - 4:01pm
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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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686 Missing Data for ne120np4
by rajuphyamu@...
1 day 17 hours ago
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Posted and Moderated by CSEG only
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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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394 adding daily ocean output
by ashields@...
December 6, 2016 - 4:25pm
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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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30 porting error!!
by wjdgns2528@...
November 24, 2016 - 8:48pm
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15 Aquaplanets with slab ocean (by Brian Medeiros 2013)
by valeriarudloff@...
October 6, 2016 - 5:45pm
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Includes issues for building/running on supported machines and porting to unsupported machines
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1162 thread-safety in shared routines
by ckuo@...
November 7, 2016 - 12:46pm
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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
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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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103 unable to complete model run
by mnawang@...
October 20, 2016 - 6:36pm
 

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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74 Running multiple test cases at once
by ksstewart22spec@...
September 29, 2016 - 9:39am
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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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601 A basic change in CO2 concentrations... doesn't work
by valeriarudloff@...
September 23, 2016 - 10:31am
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57 How to Heat the atmosphere using CESM?
by 20071058@...
November 28, 2016 - 1:28pm
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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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174 specifying output fields in simulations at different rotation periods
by ashields@...
December 1, 2016 - 5:56pm
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538 Build error with CESM1.2.0 in new machine
by ihmn.zgz@...
November 24, 2016 - 8:39am
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199
782 CAM5 segmentation fault (F_1850-PDAY_CAM5)
by scorvec@...
November 27, 2016 - 2:11pm
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336 Questions about changing the topography and the surface sensible heat flux into atmosphere
by hanj@...
November 30, 2016 - 3:34pm
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98 SCAM History variables and Heat and Water Budgets
by olson
August 16, 2016 - 11:02am
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389 nested / regional runs with CAM?
by spamiad@...
November 18, 2016 - 5:04pm
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296 moisture budget analysis & "div" var in sld cam3.0
by jalihal@...
November 4, 2016 - 3:24am
 

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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538 WACCM's aurora module
by mmills
November 27, 2016 - 9:40pm
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258 Sulphate extinction wavelength
by bardeenc
October 6, 2016 - 10:08am
 

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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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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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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35
95 How to create my own PFT data for the CLM
by 18729351715@...
October 6, 2016 - 8:37pm
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95
224 custom nitrogen deposition
by shirleyxyliu@...
1 day 9 hours ago
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946 Error in creating surface datasets in CLM4.5
by ashutosh348@...
November 11, 2016 - 6:11am
 

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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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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100 what's the difference between forcing_shf.F90 and forcing_coupled.F90 in determining the ocean surface heat flux
by wenq@...
November 29, 2016 - 8:14am
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44
122 Problem with adding an additional passive tracer in ecosystem model component of POP2
by kkretschmer@...
November 1, 2016 - 11:11am
 

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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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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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 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 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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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 run off
by jjakacki@...
August 26, 2011 - 5:49am
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8
45 FAQ: Data ocean slab mode (DOCN-SOM)
by dbailey
November 30, 2016 - 3:59pm
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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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15
44 a question about wind stress reading in a CAIF case
by gaoyanqiujuly11...
May 30, 2016 - 8:11pm
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33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
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