Main menu

Navigation

Forums

 

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.

  Forum Topics Posts Last post
No new
40
96 GoogleCode Repositories are Offline PIO source not found
by pokhotelov@...
February 20, 2017 - 5:25am
No new
Community Bug Reporting
237
764 Compiling CESM 1.2.2 using Cray compiler fails
by bleisch@...
March 24, 2017 - 6:03am
No new
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
No new
6
40 File missing
by asphilli
February 13, 2017 - 10:16am
No new
Includes requests for new features and configuration inquiries
610
1963 Runtime Issues 1.2.2 (Timeout)
by jmnicklas@...
6 hours 34 min ago
No new
This forum is for the discussion of git issues in the CIME repository
3
16 svn external for a given git tag
by andre
May 6, 2015 - 4:04pm
No new
267
705 Missing CESM-LE restart files
by mg3662@...
1 day 13 hours ago
No new
Posted and Moderated by CSEG only
0
0 n/a
No new
CESM MIP simulations, including CMIP5
17
52 CCSM4 CMIP5 historical runs r1i1p1 r1i2p1 r1i2p2 r2i1p1 r6i1p1
by strandwg
June 11, 2016 - 2:55pm
No new
2
3 Improving search in DiscussCESM forum by using tags
by manojkc
September 1, 2015 - 1:27am
No new
155
399 netcdf4c compression level
by spamiad@...
March 15, 2017 - 5:16pm
No new
Tips and tricks for getting the best performance from CESM
17
22 How to create an optimum PE layout for B1850C5 compset.
by midhun.ndr@...
January 31, 2017 - 7:34am
No new
28
44 (shr_sys_abort) ERROR: (shr_mct_sMatReaddnc)NetCDF: Unknown file format
by christopher.mal...
6 hours 59 min ago
No new
10
17 Aquaplanet for a dry atmosphere
by suhasdl.mysore@...
January 23, 2017 - 6:18am
No new
Includes issues for building/running on supported machines and porting to unsupported machines
308
1167 Error while compiling CESM1.2.2 on Titan
by benbs@...
March 15, 2017 - 3:34pm
No new
Forum for issues related to the new version control system
16
36 Incomplete CESM Download Due to Missing Googlecode Paths
by rmokos@...
July 15, 2016 - 2:24pm
No new
A place for questions about the ESMF mapping tools and the cprnc tool as well as any topics related to grid generation.
13
45 conversion between ieeer8 and netcdf
by rangel@...
March 20, 2017 - 1:47pm
No new
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.

  Forum Topics Posts Last post
No new
0
0 n/a
No new
8
9 Gravity wave drag and residual circulation (or adiabatic heat rate)
by maartje.kuilman@...
September 8, 2016 - 10:51am
No new
36
107 problem with creating ensemble members
by liuyiling.elaine@...
March 21, 2017 - 6:20pm
 

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.

  Forum Topics Posts Last post
No new
21
77 amwg diagnostics does not produce the plots
by eerfani@...
March 2, 2017 - 6:38am
No new
29
86 PV pertubation
by zhangjkstrato@...
February 18, 2016 - 12:02am
No new
forum now closed - existing threads will eventually be moved to their appropriate forums
246
603 Where in the source code are the calculations for atmospheric NHx?
by shirleyxyliu@...
March 6, 2017 - 2:27am
No new
27
58 Heating atmosphere in the lowest layers
by 20071058@...
March 21, 2017 - 3:25pm
No new
71
208 "NETCDF: Invalid dimension ID or name" Error when changing vertical resolution
by kangwanying1992@...
December 28, 2016 - 8:33am
No new
50
177 Removing atmospheric boundary conditions for aquaplanet simulations
by herold.n@...
February 27, 2017 - 3:43pm
No new
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
No new
204
790 F_AMIP_CAM5 failed with exit code 255
by baisy@...
1 day 14 hours ago
No new
123
339 volcanic parameter in CAM5
by yjgao5757@...
March 6, 2017 - 6:14am
No new
43
98 SCAM History variables and Heat and Water Budgets
by olson
August 16, 2016 - 11:02am
No new
130
397 Initial conditions for running CESM in forecast mode
by olson
March 16, 2017 - 1:14pm
No new
105
317 Calculating Surface Temperature (TS) or surface temperature at reference height (Tref) from initial file (.i File)
by xiejinbo@...
February 18, 2017 - 5:07am
 

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.

  Forum Topics Posts Last post
No new
24
46 problem about long-term archiving
by yjgao5757@...
March 8, 2017 - 1:45am
No new
114
543 Advice on getting past WACCM crashes
by mmills
March 7, 2017 - 8:47pm
No new
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.

  Forum Topics Posts Last post
No new
General Announcements for the Chemistry Climate Working Group Forum
6
20 non-existent of input data
by bianqy@...
November 10, 2016 - 7:11pm
No new
Science Issues for The Chemistry Climate Working Group
2
3 SOA simulation in CAM5
by pawanvats5086@...
October 26, 2015 - 12:19am
No new
Software and Run-time issues for the Chemistry Climate Working Group
7
13 Error at the time of writing NetCDF file of CLM 4.5
by pawanvats5086@...
January 15, 2017 - 8:26pm
 

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.

  Forum Topics Posts Last post
No new
3
7 Issue attempting to create set 1 with the lnd_diag4.2.28 package
by taylor.hughlett@...
November 18, 2016 - 2:50pm
No new
36
96 question on CLM45BGC spin up with a resolution of 0.23 *0.31
by zichongchen22@...
March 24, 2017 - 11:43am
No new
96
225 Adding a new PFT
by ali.ashehad@...
February 17, 2017 - 10:34am
No new
307
959 multiple instance, different surface data
by spamiad@...
March 15, 2017 - 3:29pm
 

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.

  Forum Topics Posts Last post
No new
CISM General Announcements
0
0 n/a
No new
CISM Science Issues
1
2 LGM initial and config files
by fyke@...
November 20, 2014 - 6:54am
No new
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/.

  Forum Topics Posts Last post
No new
12
25 question about 'za' unrecognized argument -grid_file
by hucq14@...
September 21, 2015 - 8:42pm
No new
6
8 new POP2 FAQ
by njn01
October 10, 2013 - 10:04am
No new
44
101 how to make spatial filtering for global atm and then transport to ocn in a coupled compset (B)
by zdliu@...
March 26, 2017 - 3:23pm
No new
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.

  Forum Topics Posts Last post
No new
3
7 What aerosol species does CICE use?
by wenshanw@...
November 11, 2015 - 4:35pm
No new
3
4 FAQ: Albedo/Radiation Tuning in CESM-CICE
by dbailey
April 28, 2014 - 10:24am
No new
14
55 CICE SSTDATA mode: updating sea ice fraction and SST for the next time step
by dbailey
March 4, 2016 - 11:23am
No new
20
86 conservation error
by subh08@...
January 18, 2017 - 9:30pm
 

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.

  Forum Topics Posts Last post
No new
2
2 restart in ecosystem model
by jjakacki@...
May 25, 2011 - 5:23am
No new
3
10 atmospheric CO2 used by radiative and by biogeochemical flux computations
by ludwig.lierhamm...
October 28, 2015 - 10:11am
No new
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.

  Forum Topics Posts Last post
No new
Paleoclimate General Announcements Forum
2
3 Paleoclimate Resources for CESM - Wiki on Github
by ottobli
February 5, 2016 - 2:57pm
No new
Input data inquiries for paleoclimate simulations
24
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
No new
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
No new
Paleoclimate Science Issues Forum
2
15 topography requirement in LGM
by 010022009074@...
May 12, 2015 - 7:33am
No new
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.

  Forum Topics Posts Last post
No new
1
1 run off
by jjakacki@...
August 26, 2011 - 5:49am
No new
8
64 FAQ: Data ocean slab mode (DOCN-SOM)
by dbailey
March 16, 2017 - 4:42pm
No new
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.

  Forum Topics Posts Last post
No new
1
1 Welcome!
by dbailey
March 14, 2006 - 9:23pm
No new
0
0 n/a
No new
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
No new
5
7 About the ws input on pop
by wliu.ucsd@...
October 29, 2013 - 11:41am
No new
15
44 a question about wind stress reading in a CAIF case
by gaoyanqiujuly11...
May 30, 2016 - 8:11pm
No new
12
33 How set multiyear input data in docn
by link@...
October 30, 2013 - 12:12pm
New posts
No new posts

Who's new

  • christopher.mal...
  • liuyiling.elaine@...
  • xuzq@...
  • alexander.koch....
  • abalos