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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...

I am trying to set up a first test simulation using cesm3_0_beta06 with CAM7-Chemistry enabled. At this stage I have not modified the code yet, but the longer-term goal is to implement the intermediate-complexity iron chemistry mechanisms (MIMI: Improved methodologies for Earth system modelling...

Hi, all I use cesm2.2-mosaic to simulate pm25 with below settings. &dust_nl dust_emis_fact = 0.7D0 soil_erod_file = 'dst_source2x2tunedcam6-2x2-04062017.nc' / but my dust concentrations are very low in the desert regions (comparing PM25 and dust concentrations to CAMS reanalysis, see...

Hi, all, I plan to do a future run for CAM, as MERR2 is reanalysis data, I can not find a suitable atm forcing for the future. Not sure, do you have any experiences about this? Best Ru

I modified the emission data for OC, SO2 , and BC in the atm component of CESM2.1.4 F2000climo_f09_f09; however, I noticed that the official emission data used by CESM contains no missing values or associated dimensions, for example: But the data I obtained from the CEDS website has missing...

Dear ACOM scientists I don't know if anybody is working on the tagged method right now, but try to ask if the tagged method works on all tracers in CESM? For example, I want to track the O3 concentration from different sources of NOx emission. Do I need to tag both NOx emission and O3 and all...

In a fairly recent CAM run intended to generate coupler history forcing to force CTSM: /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/f.cam6_3_112.FLT1850.ne30.landspinup.001 which has a compset of: 1850_CAM%DEV%LT%GHGMAM4_CLM51%BGC-CROP_CICE%PRES_DOCN%DOM_MOSART_SGLC_SWAV_SESP the...

Hi, all, I'm running a FC2000climo simulation for surface ozone concentrations. Here, i see some tendency variables in the `src/physics/cam/constituents.F90`: ``` 65 !++bee - temporary... These names should be declared in the module that makes the addfld and outfld calls. 66 ! Lists of...

I want to run some biomass burning experiments where I use daily GFED observations to force the model. I see that there are a handful of years that have daily GFED forcing files available in /glade/campaign/acom/MUSICA/emis/gfed/f09_daily (2016-2020). Are daily emissions files available...

I recently used CESM2.2.0 to simulate global near-surface gaseous sulfuric-acid concentrations. The results look wrong: over East and South Asia the modeled near-surface gaseous H₂SO₄ mixing ratios are extremely low. I made no other modifications—just ran the standard workflow.

What version of the code are you using? I am using the fully coupled version of CESM 2.1.5 with the B1850_f19_g17 setup Have you made any changes to files in the source tree? I made no changes Describe every step you took leading up to the problem: there is no problem with the code, I just...

What version of the code are you using? CESM 3 beta06 Describe your problem or question: Hi, I want to use the CESM to do some future scenario simulations (2030, 2050) by coupling CAM-Chem with CTSM. Just wondering where I can find out the related future SSP scenarios forcings to nudge the...

Hi everyone Recently, I need to use MOSAIC scheme in CESM to finish my final project of one course. I have used CESM2.2.2 but I have never used chemsitry related models so I have many questions: 1. I do not know if I couple this scheme correctly. At the beginning, I follow Use MOSAIC scheme...

What version of the code are you using? CESM2.2 and CAM6 Have you made any changes to files in the source tree? Changes in the nudging module and the dust scheme Describe your problem or question: From the documentation I see that besides the AODDUST, it is possible to get the AODDUST for...

What version of the code are you using? ctsm5.1.dev159 Describe your problem or question: May I get information on the default CO2 forcing data that is used in CTSM? The directory for the data is: /glade/p/cesmdata/cseg/inputdata/atm/datm7/CO2/fco2_datm_global_simyr_1750-2014_CMIP6_c180929.nc...

Hi all, I went though some of the forum threads and saw that you can use daily emissions datasets with CAM. I looked at some of the extended inventories as mentioned here Emission Inventories - CAM-Chem - wiki.ucar.edu, and while for biomass burning they're present, there seems to be no such...

Hello everyone, I am using CESM1.2 with the CAM4 component for a paleoclimate simulation with an ancient topography. I have set up globally uniform aerosol forcing by modifying the input files for prescribed aerosols (prescribed_aero_file) and aerosol deposition fluxes (aerodep_flx_file) to be...

Dear Community, I run a CESM2.2.0 case with FCSD compset during 1980-2022. The resolution is 0.9°*1.25° with 56 vertical levels. The meteorological field is nudged to MERRA2 and CMIP6 historical emissions are used. I want to analyse the contribution of STT (Stratosphere-to-Troposphere...

Dear Community, I am interested in comparing the differences in BVOC species (e.g., ISOP) contributions to SOA formation rates between two sets of atmospheric-only simulations—one with higher O₃ concentrations and one with lower O₃ concentrations. Could you please advise which variable would...

What version of the code are you using? CESM2.2.2, CAM6 Have you made any changes to files in the source tree? Changes in nudging and CLM Describe every step you took leading up to the problem: I need to use ERA5 re-analisys files to nudge aerosols. Describe your problem or question: I...