cam

Hello everyone, I am a beginner for CESM, and want to use CAM for a global atmosphere transport of a new sphere solid particle, which is not included in CAM. The transport just refer to simple physical transport process without any chemical reactions. But I have no idear how to add it, and...

Hi, I would like to run unsupported SOM with sea ice. All things I changed in the model are as follows: Compset (unsupported): 2000_CAM60_SLND_CICE_DOCN%SOM_SROF_SGLC_SWAV Grid: f19_g16 user_nl_cam: avgflag_pertape = 'A','A' fexcl1 = '' fincl2 =...

Dear all, I would like to modify the radiation reflected by the surface to the atmosphere. Where should I change the code? Thanks very much

Hello, I want to do a set of AGCM abrupt4xCO2+uniform 4K SST warming large ensemble simulation branching off from a control run. The goal of this experiment is to look at the instant atmosphere circulation responses to both SST warming and directive radiative forcing, so changes in every hours...

Hi, I want to conduct experiments branching off from CESM2 amip experiment same as the CMIP6 amip run. There are a lot of F compsets, like F2000climo, FWHIST, etc. I know CESM1 has a compset named F_AMIP_CAM5, but I didn't find the similar version in CESM2. Thanks! Best, Melody

Hello, everyone！Thanks for opening this thread. I am running fully coupled climate simulation (use B1850 compesite) with CESM1.2. The model has been running successfully for 3000 years.When I change to 'branch' continue to run the next, running successfully for six months and failed at the...

Hello, all of you. I am running a port with atmospheric CAM only in the CESM 2.2.0. I am getting an error after many warnings: "Warning: incorrect ice nucleation number (nuci reset =0)". How could I resolve this error?

Hi, When I use the iCESM1.2, I want to know is it possible to get reevaporation data? (The amount of liquid water in the cloud evaporating or ice sublimating into gaseous water) . Can I simulate it? And, if I want to simulate water vapor markers in future scenarios and use F-CASE, what do I...

Hi, When I run the iCESM1.2, I was puzzled by its' results. First I ran a simulation of iCESM.1.2 from 1975 to 2005(FAMIPC5CN), but something went wrong with the machine, and I only got the result from 1995 to 1998. So I ran a new simulation from 1995 to 2005, and want to make the results...

Hi, I have been running SCAM experiments using one of the provided IOPs, and a default time step size of 1200s (EUL, 64 x 128 grid). I would like to now change the resolution of the time step, and am unsure which is the correct variable to change. I am running experiments via CESM2.1.0, and...

Hi! I want to got the Total grid-box cloud ice water path (TGCLDIWP) or cloud water path for different tags. I added the output variable in the same way: fincl1="TGCLDIWP_NAO","TGCLDIWP_PAC"...... However, when I submit the simulation, it will report an error: FLDLST: TGCLDIWP_NAO in fincl( 1...

Hi~ I used the iCESM1.2 to simulate water vapor from different regions. The results include precipitation(PRECC,etc), H2O isotope mmr for VAPOR,H2O isotope mmr for LIQUID, etc. How can I get the precipitable water vapor(PWV) from different source? Only the Total (vertically integrated)...

I am receiving the following error after starting a run, before the first timestep occurs, at the ingestion of the inital data file that I'm pointing to via NCDATA in user_nl_cam: read_initial: model parameters do not match initial dataset parameters Model Parameters: plon = 1...

I am planning to do some F-compset runs of CESM2 at fixed CO2 that cover multiple decades and need history output for multiple large variables like temperature and winds at high time resolution (every hour). The history files take up a lot of space, and writing the files seems to slow down the...

Dear CESM community, My colleague and I are trying to perform some simulations using CESM1.2.2 that modify SW and LW at different layers. For example, we want to modify the model to reflect more SW upward or reduce the outgoing longwave at the atmospheric layer near the tropopause. I checked...

Greetings, I am modifying a module in the CAM6.0 (nudging.F90) and in during the process to build a case I get this message and the case is not completely built. Somebody knows why this directory is not created? Thanks in advance

Dear all, I'm using PORT and drive it with offline data for many years. For example, running over input data for years 0001-0010. What I have tried is set the "offline_driver_fileslist" and I have successfully finish year 0001. Then at year 0002, I set and replace the offline_driver_fileslist...

Hi everyone, I was wondering if the process to create new data streams in CESM2.2 is similar to previous version. I found this old documentation (https://www.cesm.ucar.edu/models/cesm1.2/cesm/doc/modelnl/nl_datm.html#stream), and I would like to know if I could use it for new cases in the...

Dear all, I am trying to learn how to add a passive tracer in the CAM module but am still confused after some previous posts: (e.g., CAM tracer https://bb.cgd.ucar.edu/cesm/threads/help-about-passive-ozone-in-cesm.2595/...

I have a case that I have set to resubmit 5 times, writing a restart file at the end of each run: ./xmlchange STOP_OPTION=ndays ./xmlchange STOP_N = 720 ./xmlchange REST_OPTION=ndays ./xmlchange REST_N=720 ./xmlchange RESUBMIT=5 I'm not absolutely sure that this usage is correct, but it does...