cam-chem

Greetings, I was wondering if somebody could help me to understand the reason of some outputs I got using CAM6 in CESM2.2.2 (running in Derecho). I asked CAM6 to write frequencies for each history files series each 30 minutes. FCnudge compset and MERRA-2 reanalysis are used for these tests. In...

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...

Greetings, I would need to create a new independent module in the components/cam/src/physics/cam which will be need to run and used in here. Besides the module, I also create a modified namelist_definition.xml, which includes the new variables that will called. How can I make that this new...

Hi, I recently tried to run cesm2_3_alpha17c/cesm2_3_alpha17d on a school server (Svante in MIT) and ran into the following problem: 1) I can't run FCnudge's f05_f05_mg17 grid resolution properly in CESM2.3, but it works fine in CESM2.2 version.CESM2.3 reports the following error after...

Hi, I recently tried to run cesm2_3_alpha17c/cesm2_3_alpha17d on a school server (Svante in MIT) and ran into the following problem: 1) I can't run FCnudge's f05_f05_mg17 grid resolution properly in CESM2.3, but it works fine in CESM2.2 version.CESM2.3 reports the following error after...

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

Hi all, I have a couple of FCnudged cases using MUSICA. These are running on Derecho using CESM2.2.0. One of them works, the other doesn't, and I'm not sure why this is. In the case that doesn't run, I get the following error in the atm logs: FIND_TIMES: ALL data times are after...

Hi, I'm a new user of CESM and CAM. I'm attempting to replicate a study described in this paper: Global environmental implications of atmospheric methane removal through chlorine-mediated chemistry-climate interactions - Nature Communications. However, I'm currently facing some confusion...

Hi, all. I'm running MUSICA for compset FCts2nudged on NCAR Derecho. The version is cesm2.2-asdbranch. I want to have 3-hr outputs for some variables, so I set up the second and third history outputs in user_nl_cam as: "avgflag_pertape(3) = 'A', avgflag_pertape(4) = 'A', mfilt(3) = 8...

Hi, CESM community, I just want to be clear about the model output so as to clearly interpret my model results. I have "OC", and "SOA" in my model output. Are these OC and SOA completely isolated? OC refers to primary organic aerosol (POA), and SOA refers to Secondary organic aerosol. This is...

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.

Hi, In the input data repository (https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/atm/cam/chem/emis/emissions_ssp126/), I can see biomass burning (bb) and anthropogenic (anthro) emissions .nc files. I am wondering do these files include the emissions from agricultural activities. For...

Hi all, I have a run of CAM6-Chem from CESM2.1.3 with coupled land (CLM5-BGC-Crop) and oceans (POP2) forced by SSP1-2.6 GHGs and land use. I wanted to look at some convection parameters, however the output from the model for CIN was 0 everywhere and the output for CAPE was an order of magnitude...

Hi all, I ran a CAM-Chem case in CESM2.1.3 and output CIN, but all values were 0. I've seen elsewhere that this is a known issue with CAM-Chem and that CIN tends only to be output by WACCM (I guess this is my fault for going for the cheaper model). I'd like to calculate CIN manually but the...

Hi all, I'm setting up some experiments on a regionally-refined grid and doing some emissions processing. I was wondering if there are files containing soil emissions of NH3 and NOx (which would be included as NH3_other_surface) at a grid resolution higher than 0.9x1.25? I've processed raw...

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...

Greetings to everyone, I am trying to run an initial case with CESM2.2/CAM6 but without aerosols. Looking at the CAM6 documentation (Section 8.4) and in a previous post in this forum there are some indication how to do that by adding the following to user_nl_cam: I followed that and when I...

I'm running sensitivity experiments where I have increased the soil flux of NO through the input file. When I plot the emissions data from the input file, it does not match the output variable SFNO, which is supposedly the surface flux of NO. I implemented the change by altering the namelist...

Hi all, I'm working with MUSICA and need to generate a topography file for my variable-resolution grid. I am following the instructions for the 'Topo' tool. When I run ./cube_to_target, the script fails with: error while loading shared libraries: libnetcdff.so.7: cannot open shared object...

I have previously been running the BWma1850 compset, where the point has been to run the CESM with my own volcanic forcing file (i.e. by creating a new VolcanEESM... in the stratvolc directory) such that the evolution of stratospheric aerosol from SO2 emissions are calculated by the model. The...