cam

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.

Hi,all! I wanna ask the question:how did the lowcloud effect the surface temperature? Because I find the increase of lowclloud fraction can decrease the Tmin in CESM2.1.3. The result not consisit of my common sense. We usually think the thick and low cloud can keep the surface warm in the...

Hello, I notice that I can output these variables at specific pressure level directly by set fincl1='U200','V200','U850','V850','OMEGA500','OMEGA850'. But it seems UV at other level (like 700,500hPa) can not be gotten in that way. I konw it can be gotten output the whole level of U or V or...

Greetings, How could I know from a simple CESM run, if I am using CAM or CAM-Chem?. How could I switch/change from to another? Thanks.

When running simulations with volcanic forcing in a fixed sea-surface temperature condition to get an estimate of the forcing, what output variables are the appropriate ones to use? From what I understand, the standard way to do this is to calculate it as the sum of the shortwave + longwave...

Dear All, I am running two FHIST_BGC cases to study the impact of LULCC on radiative forcing of GHGs in global, without considering their feedback. This needs GHGs to be sent from the land to the atmosphere, and not from the atmosphere to the land. The default CCSM_BGC = CO2A, it says "adds...

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...