Welcome to the new DiscussCESM forum!
We are still working on the website migration, so you may experience downtime during this process.

Existing users, please reset your password before logging in here: https://xenforo.cgd.ucar.edu/cesm/index.php?lost-password/


  1. R

    Location of .f90 file with prescribed Aerosol Parameters

    Hi, I am attempting to do an uncertainty analysis for some of the prescribed parameters in the aerosol model, such as hygroscopicity of aerosol components and the size ranges of the aerosol modes. Attached are the tables describing these values in the documentation. I am trying to locate the...
  2. P

    How to convert emissions (molecules/cm2/s) to mass emission (kg/m2/s)?

    Hello, I have the input data for B2000CAM5CN (e.g. ar5_mam3_oc_surf_2000_c090726.nc). The unit for OC emission is molecules/cm2/s. I want to compare the emissions from EDAGR (emission unit is [kg/m2/s]) and that from CESM input data. So, how can I convert [molecules/cm2/s] to [kg/m2/s]? I...
  3. R

    Resources for Aerosol Climatologies

    Hi, I am running a single column simulation for CAM, in order to model variability in radiative forcing due to anthropogenic surface aerosol. In the SCAM compset, aerosol species are relaxed to the aerosol climatologies in the initial profile. I would like to get an idea of how much...
  4. J

    turn off aerosols for indirect radiation effects

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

    Namelist variables related to aerosol activation in MAM4 (for SCAM simulations)

    Hi, I am replicating a sensitivity analysis conducted using the Global Model of Aerosol Processes (GLOMAP), with a SCAM6 simulation using the MAM4 aerosol representation. As a first step, I'm trying to match input variables used in the GLOMAP analysis, with namelist variables in SCAM6, which I...
  6. A

    Modifying dust aerosol inventory over a certain region though code modification in CESM2-CLM5

    Hi Everyone, I am trying to add a new inventory for dust aerosols over a certain region in CESM2-CLM5. My objective is to modify dust aerosols over a particular region and add my inventory. So far I have looked into this code in CLM5 which controls the dust emission...
  7. D

    Relationship between the bc_a4 files and num_a4 file.

    So, I've been talking a bit with Simone about this, but I thought I would post it here for others. The bc_a4 file for srf_emis_specifier is the surface emissions of black carbon. This has units of molecules/cm2/s. The num_a4 file is the particle number emissions file for the surface black...
  8. G

    Understanding how DMS works in CAM5

    Hi folks, I'm trying to do a set of simulations in CAM5, run in atmosphere-only mode (F_1850_CAM5 compset), that modifies the input emissions of DMS to reduce emissions in a specific region. I'm in search of information on the correct diagnostics for DMS and on how CAM5 handles DMS emissions so...