cam6

Greetings, I found the module (~/components/cam/src/physics/cam/aer_rad_props.F90) where aerosol radiative properties are computed in CAM6. In this module from subroutine aer_rad_props_sw returns SW optical props of aerosols, which are mainly extinction optical depth, scattering and asymmetry...

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 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 forum, It's not clear to me how the reaction rate of SO2 (gas) + OH -> H2SO4 (gas) is calculated in CAM6. The equation report in chem_mech.doc gives this reaction as d(H2SO4)/dt = r3*OH*SO2. When looking through mo_usrrxt.F90 I find this expression for the reaction rate (rxt)...

Hi all~ I'm trying to prescribe the dust and sea salt aerosol in two runs with F2010climo compsets, since I hope these two species remain the same when making comparisons. I set the prescribed_aero_nl group in user_nl_cam file as follows: &prescribed_aero_nl prescribed_aero_cycle_yr...

Hello ,everyone: I am planning to conduct volcanic forcing experiments (e.g. 1815Tambora or 1991Pinatubo) with CESM2.1.3-CAM6 to study the influence of a large eruption on climate,. Hoewvwr, I am not sure how to add the needed volcanic forcing file, via ext_frc_specifier or...

Hello everyone, I am trying to run CESM2.1.3 at the resolution f05_f05_mg17. It seems there is no topo file corresponding to 0.47x0.63 available for CAM6 in https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/atm/cam/topo. I realize that the resampling tool in interpic_new can create my own...

Hi all, I want to conduct a set of large ensemble that are similar to CMIP6 amip-4xCO2. However, I don't know how the CO2 concentration is set in amip-4xCO2 as the prescribed CO2 concentration is different every year. The compset I am using is FHIST_BGC, and I guess I am supposed to change the...

Hello everyone, I try to get the output including GRAINC_TO_FOOD with 1/2 degree by CESM2.1.3. The surface file and landuse file corresponding to f05_g17 have been generated, and I run this case with compset HIST_DATM%GSWP3v1_CLM50%BGC-CROP_SICE_SOCN_MOSART_SGLC_SWAV and resolution f05_g17...

Hello everyone, I use release-cesm2.2.0 and try to get the outputs with 'GRAINC_TO_FOOD'. I run this case with CAM60+CLM%Bgc-Crop+initial file "b.e20.BHIST.f09_g17.20thC.297_01_v3.clm2.r.1979-01-01-00000.nc". Unfortunately, I encountered such error to stop the run. "lnd_import ERROR: Longwave...

Hi, I want to conduct experiments branching off from CESM2 amip experiment same as the CMIP6 amip run. There are a lot of F compsets, like F2000climo, FWHIST, etc. I know CESM1 has a compset named F_AMIP_CAM5, but I didn't find the similar version in CESM2. Thanks! Best, Melody

Hi all, For some air quality calculations, I'd like to output the bottom 2 layers of a few fields. Starting with temperature and O3, I can get the surface temperature with 'TS' and the the surface O3 concentration with 'O3_SRF'. Is there a way to get just the bottom 2 layers of the atmosphere...

Hi all, Quick and hopefully easy question. I'm looking for a CAM6 output field which will give me cloud droplet number concentration on pressure levels (i.e. a 3D version of CDNUMC) for some offline calculations. I think I might want AWNC ('Average cloud water number conc') or ICWNC ('Prognostic...

Hello, all of you. I am running a port with atmospheric CAM only in the CESM 2.2.0. I am getting an error after many warnings: "Warning: incorrect ice nucleation number (nuci reset =0)". How could I resolve this error?

HI, I'm getting the following reproducible error in CAM while running a CAM6 f09 FHIST case with cam_cesm2_2_rel_03 (I think). Oddly it is able to run over 10 years before this error. The modifications I make are 1) using coupled CESM2 SSTs and sea ice rather than observed and 2) masking out the...

Hi all, I have a user-defined CESM2.2.0 compset on Cheyenne which runs fine. However, after changing the initial condition files used, it fails to run beyond the first timestep with the following error in cesm.log: ERROR: component_mod:check_fields NaN found in ATM instance: 1 field Sa_z...

Hi all, I'm running a coupled atmosphere-ocean compset in CESM2.2.0 on Cheyenne. I have successfully run this compset for 10 years - in the next run of 10 years it crashed at year 18. The error in the cesm.log is: WHL, oc_tavg_helper is already associated; reset the tavg fields 0: sysmem...

Hi all, I am new to CAM and am confused about the meaning of various cloud fraction outputs. I am running a simulation with the BSSP585 compset using CESM2.1.3. The macrop_scheme and shallow_scheme ='CLUBB_SGS', the deep_scheme='ZM',and the microp_scheme ='MG'. My first question is: what is...

Hello all, I am doing a bias correction for SST & Ice_cov data. I want a fully coupled model produced (BHIST) sst & ice_cov data from 1850-2014. Kindly provide me with the data. Thanking you. With regards, Sushovan Ghosh

Hi all, I'm trying to build a transient run based on an existing non-transient run I made previously. The problem I am having is trying to turn off 'ext_frc_cycle_yr', 'srf_emis_cycle_yr', etc. The model doesn't run because these values are fixed at 2010, even though I have not set them in...