co2

Hi all, I tried to add 'co2_cycle' into my simulation (FCHIST), but it failed with an error: "CO2&IC is already on the list". I added '-co2_cycle' to `CAM_CONFIG_OPTS` and also added 'co2_flag=.true.' in `atm_in`. Looking forward to your reply. Best regards, Haven

I find that co2 in CESM2 is bigger than other cmip6 models. 1st figure is CO2 in GFDL-ESM4, 2nd figure is CO2 in CESM2, 3rd figure is CO2 in MRI-ESM2-0 I compared models, then CO2 of CESM2 is bigger than others. But, co2mass of CEMS is same other models. Why CO2 of CEMS is bigger than others...

Hi, CESM users. I have known that constant = use the fixed CO2 value from the atmosphere; prognostic = use the prognostic value from the atmosphere; diagnostic = use the diagnostic value from the atmosphere. While I am confused about the "box_atm_co2", is it means an atmospheric CO2 model...

In an attempt to compare volcanic eruptions in different climate states I want to run the BWma1850 compset with doubled CO2 concentrations before I branch off and run my ensemble of volcanic eruptions experiments. (I have already been running these eruptions using the standard BWma1850 compset.)...

I want to run a simulation similar to the BWma1850 compset, but that has fixed sea-surface temperature (see long name below) and then double the CO2 concentration. Simulation long name: 1850_CAM60%WCCM_CLM50%BGC-CROP_CICE_DOCN%SOM_MOSART_CISM2%NOEVOLVE_SWAV_TEST My first approach was to only...

Dear all, I'm curious about the calculation flow of CO2 concentration in BPRP compset (coupled with BGC). If the emissions are prescribed, In my imagination, CO2 emission -> rough diagnostic ATM CO2-> radiation -> LND, OCN CO2 flux -> ATM CO2 ->?? or simultaneously calculated? Is this...

Hello, I want to find out more about how CO2 influences for example on the global temperature, and how this is reflected in the model (theoretically). Therefore, I'm trying to find the underlying equations in the CESM1 or 2 model which depend on values/parameters related to CO2. I've searched in...

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...

Hello, I am running CESM 2.00 in Cheyenne. I ran a couple of prescribed SST runs with F2000climo. Now I want to change the CO2 concentration with F2000climo compset. I added co2vmr values in the user_nl_cam. However, the model doesn't take the value, and I don't see any changes in the atm_in...

I want to run a G1850ECO_IAF case with changing CO2 values overtime. For this I changed OCN_CO2_TYPE = diagnostic, CCSM_BGC = CO2A and DATM_CO2_TSERIES = 20tr. It runs for at least 1 month but the output of ATM_CO2 is constantly 0. Did I miss an option or is CCSM_BGC set to the wrong value?