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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...

What version of the code are you using? CESM2.1.3, cam6, clm5 Have you made any changes to files in the source tree? I haven't change the code. I want to run a base case successfully at first. Describe your problem or question: I have tried different compsets, including FCSD, FC2010climo...

Hi all, I am trying to run a few CESM1.2.2 runs to examine the effect of dust in a paleoclimate scenerio. I set "CAM_CONFIG_OPTS" to "-phys cam4 -prog_species DST" and included modifications per Albani 2014. While DST01DD to DST04DD, DSTSFDRY and DSTSFWET have reasonable values, DF_DST01-04...

What version of the code are you using? CESM2.2.0 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: I am using the nudging namelist to specify what re-analysis variables I want to...

Hello there! I'm trying to calculate the residence time of atmospheric aerosols, which variables from the CESM1.2 output should I use? I've learned that I can calculate residence time from both emission and removal perspectives, but I'm not sure how to do it. Thank you in advance!

What version of the code are you using? CESM2.2.0 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: I have run a multiyear case (2010-2012) using MERRA2 and assimilating AOD from MODIS to...

Hi, I am new in CAM. I would like to ask whether the land use change can affect aerosol simulated by CAM. I am using CESM2.1.5 (with CAM6) and FHIST compset. I am running a simulation with land use changes. What I have known is that there is no aerosol emissions from CLM. According to the...

Hi all, We are excited to introduce IPTpy, a Python-based input processing tool that generates global 0.9° × 1.25° anthropogenic emissions using CAMS5.3, CAMS6.2, and CEDSv2021_04_21 inventories. We are looking for testers to try out the IPTpy by GitHub clone and provide valuable feedback...

Hi all, I'm using the FCHIST mode of the CESM 2.1.3 and I'm using the model to run sensitivities for NOx and NH3. I have two problems: 1.The model output results are in mol/mol, how should I convert them to ug/m-3.(especially NOY，noy = total nitrogen...

Hi all, I'm using the CESM 2.1.3 model for SO2 sensitivity testing (other variables like BC, DMS, etc. are all 0), and I'm using (so4_a1_SRF+so4_a2_SRF+so4_a3_SRF)*1.29 calculating the sulfate concentration. I found that it is not the case that the higher the sulfate concentration, the greater...

Hi all, I am currently trying to add a new tracer to CAM-Chem in CESM2.1.5. My first step to do so is to copy the chem_mech.in file from pp_trop_mam4_vbs elsewhere and modify it to add the new aerosol. However, when doing so I encounter the following error: ERROR: Command...

What version of the code are you using? CESM2.2.2 Have you made any changes to files in the source tree? Some changes in the nudging module If this is a port to a new machine: Please attach any files you added or changed for the machine port (e.g., config_compilers.xml, config_machines.xml...

What version of the code are you using? cesm2_3_beta17 Have you made any changes to files in the source tree? A new module developed in CLM and is ready to be coupled with CAM Describe every step you took leading up to the problem: Describe your problem or question: Hi, I am new to...