cam

Hello team, I am using CESM2.1.2 but with corrected SOAG input data (e.g. for BC, DMS, SO2) for BSSP245cmip6, BSSP360cmip6 and BSSP585cmip6, with the new files being called e.g...

Dear all, Recently I checked the value of ("CLDLOW","CLDMED","CLDHGH","CLDTOT") and CLOUD, but the sum of first 3 cloud type does not equal to CLDTOT, besides CLDTOT and CLOUD are also different . If i plan to use 3-types of cloud and also total cloud, i use first 3 and sum them up as total...

Hello, I am trying to modify CAM (based off of git tag `cam6_3_139`) to implement an updated gravity wave parameterization in `src/physics/cam/gw_drag.F90`. As part of my work I need to operate on some variables using the global grid rather than the chunked grid that has been scattered to...

Hi, I am a student working with a CAM6 model output (not CAM-Chem). I want to derive the mass and number concentrations of a certain aerosol type and I have several questions about the aerosol outputs: 1. For example, if the coarse mode include dust, bc, soa etc... Does the output "num_a1"...

Hi there, I am currently using CESM2.3.ahpha17d with the CAM tag set to cam6_3_144, the compset as FCnudged, and the resolution set to ne30_ne30_mg17. During the check inputdata phase, I encountered an issue where the data MERRA2_ne30_32L is missing. I have checked the repository at...

Hi, I am trying to download input data but get the following error when running ./check_input_data --download: Similar issues seemed to have been solved by modifying the cime/config/cesm/cesm_input.xml file, either by moving the svn download method first (here) or adding "/" at the end of...

Hi, I wanted to restart the two experiments of CESM2.1.3 (with compset "F200climo"). So, I changed the env_run.xml as below. ./xmlchange GET_REFCASE=FALSE ./xmlchange RUN_TYPE=branch ./xmlchange RUN_REFDATE=0053-01-01 ./xmlchange RUN_REFCASE=EXP2 -------> case name so, EXP1 or EXP2...

Dear all, My research focuses on the climate response to land use, so I mainly modify the surface energy balance in the CLM module and view the output files from the CAM module. However, I forgot to reflect the changes in albedo in the variables ALBD and ALBI which will export to CAM. And I...

Hi,all! I output the 10m wind speed by using U10 variable. Also, I output the TAUX and TAUY(Zonal surface stress) . TAUX and TAUY do not seem to be the U,V variables needed to plot wind direction. UBOT and VBOT seem to be the corresponding variables, but for heights higher than 10 m. Is...

When trying to clone release-cesm2.1.3, there is an error due to '/CFMIP/COSPv2.0/tags/v2.1.4cesm/src' path not found and the ./manage_externals/checkout_externals fails So, I modified "repo_url = Tags · CFMIP/COSPv2.0" --> "repo_url = https://github.com/CFMIP/COSPv2.0/releases/tag" in...

Hi, With CESM-2.1.3 for example, what exactly do the 4 values printed in the atm.log file at each time step correspond to (physical quantity and unit)? If they are identical for 2 runs for the same time step, does it mean that these 2 simulations are exactly the same, or can it be mere...

Hi, everyone! I try to test the nudging tools in directory 'components/cam/tools/nudging/Gen_Data/'. And I chose ERAI as the target reanalysis product. I edited the csh script according to the instructions in the README file and submitted it for execution. Unfortunately, there was an error. I...

Dear all, I find the cam model is stuck in the process as "Creating new decomp". I don't know why. I look through cpl.log and find the cam model is stuck. My compeset is F2000climo and res is f09_g09_mg17. The attachment include the slurm file and atm.log.

Hi, I am new to use CESM. I want to use CESM to run high resolution (0.1 degree) regional simulation using the CLM5-BGC-crop coupled with CAM in Europe. But I did not find step-by-step user guide from CESM official website. And I am not sure whether I must use variable resolution CESM. It is...

Hi, everyone, I have finished a simulation using FHIST for periods 1990-1994, i have checked the output of tempeature variable, There is TSKIN in clm and TS in atm, the TS is described as the radiation temperature，but the TSKIN is also the radiation tempeature? I am not sure their differnce, i...

hi, everyone, when I run FHIST simulation for 1990 (for one year) in supercomputer, and set the following namelist as do_transient_crops = .true. do_transient_pfts = .true. !flanduse_timeseries = '' !fsurdat =...

Hello everyone I added a new aerosol with dust components in CESM, but I don’t want this new aerosol to have radiation effects. I just want it to be transported and settled along with the dust aerosol. I tried setting the parameters in the '&rad_cnst_nl' corresponding radiation file to 0 or a...

Hello everyone I would like to modify the incident solar flux ('solin') in a selected region and investigate the responses in the atmosphere and ocean. In 'CAMRT' codes, 'solin' is part of a series of computations that can affect other variables. However, in 'RRTMG' codes, 'solin' becomes...

Dear CESM/CAM community, I am aiming at using relative relative humidity output from CESM experiments. In doing so, I encountered problems (comprehension issues) with the RHREFHT field: When performing preliminary analyses (using the CESM2 Single Forcing Experiment), the relative humidity...

Greetings, If I want to run CESM with specified dynamics or nudging in the atmosphere in the future, and I specify the scenario, such as ssp245. Could I do it this way? Could I first simulate the meteorological conditions of 2030 and then use the simulated data for nudging? Thanks in advance.