cam

Hi all, I am reading the documentation for CAM6.0, and in chapter 7about input datasets, in section 7.5 for meteorological data sets it is claimed that CAM uses GEOS5 and MERRA2 meteorological reanalysis. How could I know which datasets are used?. Both?. How could I customize that input? Is...

Say I want to build the model with a modification to CAM in the file src/physics/simple/physpkg.F90 How do I ensure that the model knows to modify this file rather than src/physics/cam/physpkg.F90? Should I insert this into SourceMods in the CIME case directory by replicating the directory...

Hi! I am a green hand of CESM , and recently I have been learning how to diagnose the radiative forcing. The guidance includes radiative forcing diagnosis for aerosols, such as modified the user_nl_cam to dignosed the Black carbon radiative forcing:(9. Physics modifications via the namelist —...

I am trying to perform a simple Held-Suarez configuration in CAM, with AOA tracers active. I first spun up the model with a period of 1.5 years without including -age_of_air_trcs to CAM_CONFIG_OPTS I am then trying to do a longer run using this spun up state as the initial condition. For 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 was testing a dry dynamical core run and add some output variables in user_nl_cam files. however, it turned out that some variables are not available in this idealized run. i just wonder generally where can we get a list of available variables for certain compset? i found a master field...

Hi. I just started to get in touch with CESM, I made the modification according to the guidance on calculating aerosol radiative forcing in CAM6.3, but it failed, I suspect I made a mistake when I modified namelist, my method is to copy the code that needs to be modified directly into the last...

HI. I tried to copy the method in "9.5 Example-Black Carbon Radiative Forcing" in the CAM6.3 Use's guide to Diagnostic BC radiative forcing, I copied the following line to the end of user_nl_cam and then run the program: mode_defs = 'mam4_mode1:accum:=', 'A:num_a1:N:num_c1:num_mr:+'...

Hi everyone, I'd like to inquire about the difference between surface temperature (radiative) and ground temperature? The first one is TS from CAM while the second is TG from CLM. More specifically, I am currently using CESM1.2.2 with CAM4 and CAM5. Somebody seems to have asked this before...

Hi, I didn't find the following files for SSP370 in the input data file (https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/atm/cam/chem/emis/emissions_ssp370/). Could you please let me know where can I find those files? missing data: C2H4_bb CB1_bb, CB2_bb OC1_bb OC2_bb I just found these...

Hi all, I'm a CESM2 novice interested in BVOC emissions. I'm planning some runs using a CESM2 build that couples CLM5 and CAM6. I know that the MEGAN model in CLM5 produces various BVOC species and that CAM6 can be set to show the MEGAN fluxes from the land to the atmosphere by adding the...

Hello scientists, I am looking for cam history fields like clean sky downwelling solar flux at surface and TOA. The word "Clean" refers to all-sky flux without the aerosols effect or simply No aerosol sky solar flux. All-sky flux @ surface refers to Downwelling solar flux at surface (FSDS). Is...

I'm trying to run from initial conditions on file, pointed to by NCDATA. I'd like to verify that I've constructed the initial conditions properly by running a 30-day sim with FV3 (--res C24_C24_mg17) and --compset FADIAB. However, the run crashes immediately with a vague error message in the...

Hi all，I want to know how to turn off the indirect radiation effects of aerosols.

I have created a CIME case, which has been setup and built. As I understand, the namelist files user_nl_xxxx can be edited post-build. If I want to vary a namelist setting X across several runs, I can do that by 1) Running CESM 2) editing X=... in user_nl_xxxx 3) Run again Two problems... 1)...

Hello: There was an error when I use the CAM compset "FC2010climo", something went wrong when I type the "./case.submit" command. Below is error message: ------------------------------------------------------------------------- 2020-12-20 20:09:05 MODEL EXECUTION BEGINS HERE run command is...

Hi, I am trying to run a case using FHIST_BGC compset, ./create_newcase --compset FHIST_BGC --res f09_f09_mg17 --case ~/CESM2/scratch/FHIST_BGC. when check the input data, I found three soa_a1 files are missing that could not found in ftp://ftp.cgd.ucar.edu/cesm/inputdata/. my CESM release is...

Dear everyone: I have got the same error in some F* case (such as FWHIST_BGC, FWmaHist-BGC andFCfireHIST), even if run with default, the error is pio_support::pio_die:: myrank= -1 : ERROR: pionfget_mod.F90:. my cesm release is 2.1.3, my machine plateform is tianhe2. my case...

Hi everyone! Is there a way to get air density from CESM1.2.2? Looks like air density is not included in the master history file for either CAM4 or CAM5. Thanks, Wade http://www.cesm.ucar.edu/models/cesm1.0/cam/docs/ug5_0/hist_flds_fv_cam4.html...

Running a coupled model with F compset and two different CAM physics downloaded its input data from the server. Now, i have few questions for some clarification before analyzing them. 1- Suppose my model is already in a balance state with appropriate recommended spin-up, do i need any extra...