cesm2

Dear all, Is there any way in CESM where I can modify the agricultural ammonia and see how it can affect the ambient PM2.5 globally? I can find some emission files for ammonia from "bb" and "anthro" for different SSPs, but not NH3 solely from agriculture. Any hint/idea on how I can do this in...

Hi, I'm running a fully coupled simulation at 2 degree resolution (compset: 1850_CAM60_CLM50%BGC_CICE_POP2%ECO%ABIO-DIC_MOSART_CISM2%NOEVOLVE_WW3_BGC%BDRD, resolution: f19_g17), as a hybrid run branching from year 401 of the 2 degree PI control (b.e21.B1850.f19_g17.CMIP6-piControl-2deg.001)...

Say I want to build the model with a modification to CAM in the file src/physics/simple/physpkg.F90 How do I ensure that the model knows to modify this file rather than src/physics/cam/physpkg.F90? Should I insert this into SourceMods in the CIME case directory by replicating the directory...

In my experiment, I want to hold the solar radiation using external data. So I plan to use downloaded shortwave (solar radiation) data to overide the model calculation sw value in CESM2 coupler. I found the coupler sw calculation process in subroutine seq_flux_ocnalb_mct in the file...

I am trying to perform a simple Held-Suarez configuration in CAM, with AOA tracers active. I first spun up the model with a period of 1.5 years without including -age_of_air_trcs to CAM_CONFIG_OPTS I am then trying to do a longer run using this spun up state as the initial condition. For this...

I try to run the I1850Clm50BgcSpinup before running IHISTCLM50Bgc. But I got the error as below. = BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES = PID 65953 RUNNING AT elnino02 = EXIT CODE: 233 = CLEANING UP REMAINING PROCESSES = YOU CAN IGNORE THE BELOW CLEANUP MESSAGES...

hi, I encountered the following error message after the model run for around 1 min. There is no error during case create/build/submit but during case run. I am not sure what is causing this problem. I am using CESM2.1.3, CAM4-chem tropospheric MOZART, CLM5, FMOZ compset. Could anyone suggest to...

Hi all, I would like to interpolate some initial conditions from WACCM (70 vertical levels) to use in a CAM-chem run (32 vertical levels) using the interpic tool. I can see that a 32-level case is non-standard in the script 'create_template.ncl' which is required to run interpic. Sure enough...

I found the prescribed aerosol deposition data in 2000: “aerosoldep_monthly_2000_mean_1.9x2.5_c090421.nc”. Does anyone know any information about its used model/accuracy or any reference about this file? I also found a regridded version I also found a higher resolution version...

Hello Folks, I'm wondering does the CESM team has input data for the WRF model in the CMIP6 project? I want the SSPs scenarios. And are the data the same as the "NCAR CESM Global Bias-Corrected CMIP5 Output to Support WRF/MPAS Research" ? I can't find similar data at...

Hi, I tried to run a case with compset of F2000climo (Is it similar to F2000 in CESM 1.2.2?) and the resolution of f09_g16. The partial error message of cesm.log is as follow (The whole file is also attached): I just create case then setup, build and run, have not modified any config files yet...

Hi, In CESM2.1.3 (FMOZ compset, CAM40%TMOZ, CLM5) do we manually need to turn on climate-chemistry interactions (i.e., simulated aerosols and ozone can actually affect climate?), and two-way nitrogen fluxes (i.e., does your simulated nitrogen deposition actually affects the land?). Where can I...

I would like to purchase nodes on my institution's supercomputers. Can someone estimate how many cores and how much memory are needed as well as what the speed of the network interconnection is for CESM2 simulations at 0.25 deg resolution for about 30 years?

Hi, I am currently using CESM2.1.3 (CAM4, CLM5), FMOZ compset. I want to get O3 hourly output in the hist file and the rest of the other variables in the monthly output (default). I made some changes in user_nl_cam, but I am still getting h0 files as model output and on checking the output .nc...

Background We are trying to run CESM2 job on Cheyenne, version release-cesm2.1.3, WACCM MA. The goal is to conduct a simulation of stratospheric aerosol geoengineering, branching from a "background" run in 2035. The first year of simulation runs successfully, but every time we submit the second...

Hello, I'm PhD student who just start studying CESM2 modeling. Basically, I've studied and followed CESM2 Tutorial materials which are available freely online. I could learn the way to change CO2 concentration by changing "co2vmr" namelist with B compset example. Then now, I would like to change...

Hi, I am running CESM2.1.3 with FMOZ compset, trying to see the impact of landcover change. I keep on changing "PCT_NAT_PFT", "PCT_NAT_PFT+PCT_CFT" and "PCT_NAT_PFT+PCT_CFT+PCT_CROP". Making change on the first two runs well, but when I change PCT_CROP along with PCT_NAT_PFT & PCT_CFT, there is...

Dear Scientists and all, I can create the case without turning on the MEGAN, but when I turn ON the MEGAN (./xmlchange --append CLM_BLDNML_OPTS="-megan"), it results in some error message (ERROR: incompatible settings in drv_flds_in) (attachment). Following are the major settings of my model...

I'm currently trying to create a simple heat budget from the CESM2 ocean data linked below but couldn't find some of the variables included in the CESM1 monthly ocean data set. Specifically I am looking for the HDIFE_TEMP, HDIFN_TEMP, and KPP_SRC_TEMP variables. I found the vertically integrated...

I am used to making changes to user_nl_xxxx after a CIME case has been built, which as far as I know, is fine since namelists are always generated at runtime. Can I also do this with env_*xml variables, via xmlchange? Or does xmlchange need to be used only pre-build? All I am trying to do is...