aerosol

Hi, I am conducting regional aerosol perturbation experiments in CESM2.1.5 using the F2000climo compset resolution to study the influence of aerosol teleconnections on regional climate. I have already successfully implemented regional masking of prescribed aerosol emissions through modifications...

Hi everyone, We are working with CESM 2.1.3 and trying to separate the specific climate responses (e.g., changes in surface temperature, precipitation, and circulation) to the anthropogenic aerosol direct radiative effect (ARI) and indirect radiative effect (ACI). Now，we have completed a BHIST...

Hi, I am running a CESM2.1 BHIST simulation I am interested in analyzing the aerosol size distribution and comparing the model results with satellite/AERONET data. To do this, I need the Angstrom Exponent. I checked the Field List but didn't find a direct variable for the Angstrom Exponent.

What version of the code are you using? CESM v2.1.5 Have you made any changes to files in the source tree? xml files updated for porting to lab workstation Describe every step you took leading up to the problem: I have run a case f19_f19_mg17.FW2000climo and would like to create a new...

Hi, I am currently trying to remove the radiative effects of dust_a1 in CESM2.1.5 but am running into issues and do not know the rrtmg code so well. I have seen other similar issues on the forum such as here and here but they were either not answered or I could not apply the proposed...

What version of the code are you using? - I ran FCnudged using CAM6.3 and CTSM5.2. Have you made any changes to files in the source tree? - No When I checked the output of AODVIS, the northern regions did not have data. Could anyone tell me why? Is it due to SGLC or is it due to using FV...

Dear CESM Community, I am currently working on an aquaplanet simulation using CESM, and I would like to disable specific land-based aerosol modes while using MAM7. The aerosol modes I want to remove are as follows: Primary carbon Fine dust Coarse dust However, I still want to keep sea salt...

Hi all, I am trying to run a simulation in CESM2.1.5-CAM6 with trop_mam4 chem and MERRA2 offline_dyn to see the impact of turning off H2O2->Sulfate and Ozone->Sulfate aqueous reactions. I am trying this by copying the mo_usrrxt.F90 (found in $MODELROOT/components/cam/src/chemistry/mozart) in my...

Hi, I am a student working with a CAM6 model output (not CAM-Chem). I want to derive the mass and number concentrations of a certain aerosol type and I have several questions about the aerosol outputs: 1. For example, if the coarse mode include dust, bc, soa etc... Does the output "num_a1"...

Hi everyone, I am running CAM4 on CESM2.1.3, but would like to have a better Aerosol-Cloud Interaction. I therefore tried to change the microphysics package to the one developed for CESM5, by running: ./xmlchange --append CAM_CONFIG_OPTS='-microphys mg1'. I can build the case, however when...

Hello everyone I added a new aerosol with dust components in CESM, but I don’t want this new aerosol to have radiation effects. I just want it to be transported and settled along with the dust aerosol. I tried setting the parameters in the '&rad_cnst_nl' corresponding radiation file to 0 or a...

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 have recently been looking at the paper Climate variability and change since 850 CE (Climate Variability and Change since 850 CE: An Ensemble Approach with the Community Earth System Model) and the corresponding data sets that go with it at www2.cesm.ucar.edu/models/experiments/LME. What I...

Hello there! I am a new user to WACCM/CAM and I am interested in adding alumina emissions at altitude. However, I am confused how to specify the particle distribution size for my emissions. I am also curious to learn how to add optical properties such that WACCM computes the radiative forcing...

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...

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...

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...

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

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...

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...