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Dear Community, I run a CESM2.2.0 case with FCSD compset during 1980-2022. The resolution is 0.9°*1.25° with 56 vertical levels. The meteorological field is nudged to MERRA2 and CMIP6 historical emissions are used. I want to analyse the contribution of STT (Stratosphere-to-Troposphere...

What version of the code are you using? CESM2.2.2, CAM6 Have you made any changes to files in the source tree? Changes in nudging and CLM Describe every step you took leading up to the problem: I need to use ERA5 re-analisys files to nudge aerosols. Describe your problem or question: I...

I am running simulation with CESM2.1.4. The model uses MAM4 to calculate aerosol number concentration and mass concentration. What I want to do: Simulation 1: output the emission flux of dust (both number and mass flux) Simulation 2: read in the (daily) output of dust number and mass flux from...

Hi everyone, I am trying to model HFCs using CESM2.1.5. Wondering if there are any compsets that contain HFCs or HFC-134a-equivalent in its lower boundary condition files? I have found CFC11eq in other compsets (such as FW1850) but no HFCs. I would really appreciate any help on this!

Hi, I am using the cesm3_beta06 version code, and want to know if there is any compset that satisfies the requirements of turning on the CAM-Chem and BGC with nudged wind? By looking at the compset website ( CESM2.2.2 Component Sets Definitions ), I only find that the FCfireHIST has the...

What version of the code are you using? CESM2.2.2 Have you made any changes to files in the source tree? Changes in dust scheme and nuding Describe every step you took leading up to the problem: I need to create new emissions for current months of 2025 and I need some specific NCL libraries...

Hello everyone, I'm using cesm version 2.1.3, create_newcase --res f19_g16 --compset FHIST, I tried to add some new chemistries in chem_mech.in to simulate, CAM_CONFIG_OPTS： -phys cam6 -chem trop_strat_mam4_vbs; CAM_NML_USE_CASE：2010_trop_strat_vbs_cam6， and the source code has been modified...

Hi, all I run a offline clm5.0, the MEG_isoprene is a default output, but when I changed to run the FHIST case with cesm2.1.3, I can not find MEG_xx in clm2.h0 and cam.h0 files, I would like to ask if the model is coupled, why the MEG_isoprene is disappeared from clm2.h0 files... or I need to...

Hi, I am currently trying to remove the radiative effects of dust_a1 in CESM2.1.5 but am running into issues and do not know the rrtmg code so well. I have seen other similar issues on the forum such as here and here but they were either not answered or I could not apply the proposed...

Hi all, Has anyone succesfully run MUSICA (i.e. CAM-Chem on a variable-resolution SE grid) with future (SSP) emissions? I've run into numerous problems attempting to do this following the approved procedure of using NCAR-provided tools to regrid and then rename raw CMIP6 emissions, and I'm...

What version of the code are you using? CESM2.2.1/CAM6 in Derecho Have you made any changes to files in the source tree? Some changes in the nudging module Describe every step you took leading up to the problem: After modifying the nudging module I want to see how the q-array where are all the...

Hello, recently I've been simulating SOA formation using the CAM-Chem module, and I have some questions regarding the mo_prod_loss.F90 file. Specifically, I'd like to ask about the origin of the coefficients used in the production code for species 165–169 (SOAG0–SOAG5). For example...

I have the following questions： I found the list of atmospheric variables in the case I ran in the atm_in file, but I don't know where to look up the specific meaning of these variables, such as: bc_a1, bc_a4. This is the original atm_in file: aer_drydep_list = 'bc_a1', 'bc_a4', 'dst_a1'...

Hi, I have been tring to run CO2 1PCT increase since 2000 experiments run using “2000_CAM60%1PCT_CLM50%BGC-CROP-CMIP6DECK_CICE%CMIP6_POP2%ECO%ABIO-DIC_MOSART_CISM2%NOEVOLVE_WW3_BGC%BDRD”, but there are some problems after submitting case. Cesm.log states “ERROR: flbc_inti: cannot specify...

I have a question regarding the actual unit of the num_a4 parameter. From what I’ve observed, num_a4 typically has a unit of (particles/cm²/s) × (molecules/mole) × (g/kg). However, when I looked into the source code used to generate BC emissions—such as the script at...

I’ve encountered a strange issue where the size of the cesm.log file grows to several GBs.The reason appears to be that the model keeps printing the following message repeatedly in the log file imp_sol: time step 1800.000 failed to converge @ (lchnk,vctrpos,nstep) = 2984 489...

Please fill in all relevant information below, deleting the red text after you have read it. Before submitting a help request, please check to see if your question is already answered: - Search the forums for similar issues - Check the CIME troubleshooting guide to see if any suggestions there...

Hi all, I am currently using the IPT tool to to regrid MERRA2 data. The original MERRA2 data are from NCAR machine. Following the instructions, I attempted to use WRAPIT to compile MAKEIC.so using NCL/6.6.2. However, I keep running into the following error: WRAPIT Version: 120209 *** buffer...

Hi all, I intend to regrid an fv09 Cam-Chem_ic_nudge.cam.i.2010-01-08-00000.nc file onto a SE grid. There were no errors shown in the log file during the regridding process. However, when I use it as the ncdata to run CESM2.2, I meet the following error in both the atm.log and cesm.log files...

Hi, I run into an error message from CESM2 srf_emis_specifier "ERROR: Could not find all inputdata on any server" The missing files are in '/glade/campaign/acom/acom-weather/MUSICA/emissions/qfed2.6_finn/f09/' I logged in Derecho and found the directory empty. There was no such an error...