DOI: 10.5061/dryad.1rn8pk14d
title: GEOS-Chem-TOMAS model output for 2019-2020

description: The model output contained in this dataset is created using
 GEOS-Chem-TOMAS simulations using the GFAS biomass burning emission
 inventory for 2019 and 2020. We test three biomass burning plume injection
 height (BB-PIH) scenarios: well-mixed into the planetary boundary layer,
 and two scenarios using GFAS estimates of plume injection height. Those
 three simulations are used in the creation of this dataset. The following
 is a brief summary of the key results of the study. Elevating BB-PIH
 increases the simulated global-mean aerosol optical depth (10%) despite a
 global-mean decrease (1%) in near-surface PM2.5. Increasing the
 tropospheric column mass yields enhanced cooling by the global-mean
 clear-sky biomass burning direct radiative effect. However, increasing
 BB-PIH places more smoke above clouds in some regions; thus, the all-sky
 biomass burning direct radiative effect has weaker cooling in these
 regions as a result of increasing the BB-PIH. Elevating the BB-PIH
 increases the simulated global-mean cloud condensation nuclei
 concentrations at low-cloud altitudes, strengthening the global-mean
 cooling of the biomass burning aerosol indirect effect with a more than
 doubling over marine areas. Elevating BB-PIH also generally improves model
 agreement with the satellite-retrieved total and smoke extinction
 coefficient profiles. Our two-year global simulations with new BB-PIH
 capability enable understanding of the global-scale impacts of BB-PIH
 modeling on simulated air quality and radiative effects, going beyond the
 current understanding limited to specific biomass burning regions and
 seasons.
description: This dataset contains 3 netCDF files. Each file is for a
 different configuration of biomass burning plume injection height in
 GEOS-Chem-TOMAS. GCT_Output_PBL contains the output for the default
 configuration, where all biomass burning emissions are emitted into the
 planetary boundary layer. GCT_Output_STANDARD contains the output for the
 simulation using the GFAS altitude of the plume bottom and the plume top.
 GCT_Output_HIGHER contains the output for the simulation using the GFAS
 plume heights to calculate plume depth, but placing the bottom of the
 plume at the GFAS altitude of the plume top.
description: # GEOS-Chem-TOMAS model output for 2019-2020
 [https://doi.org/10.5061/dryad.1rn8pk14d](https://doi.org/10.5061/dryad.1rn8pk14d) ## Description of the data and file structure These data were created for a study looking at the implications of biomass burning plume injection height in a detailed global aerosol microphysics model (GEOS-Chem-TOMAS). ### Files and variables #### File: GCT\_Output\_HIGHER.nc **Description:** NetCDF of GEOS-Chem-TOMAS output in 2019 and 2020 for the HIGHER configuration of biomass burning plume injection height. Contains: Surface PM2.5 (PM), Surface PM2.5 from biomass burning (BBPM), column integrated organic aerosol and black carbon from biomass burning (BBOA and BBBC), all-sky and clear-sky biomass burning direct radiative effect (ASBBDRE and CSBBDRE), percent change in number of particles larger than 80 nm due to biomass burning (BBN80), and biomass burning aerosol indirect effect (BBAIE). #### File: GCT\_Output\_PBL.nc **Description:** NetCDF of GEOS-Chem-TOMAS output in 2019 and 2020 for the PBL configuration of biomass burning plume injection height. Contains: Surface PM2.5 (PM), Surface PM2.5 from biomass burning (BBPM), column integrated organic aerosol and black carbon from biomass burning (BBOA and BBBC), all-sky and clear-sky biomass burning direct radiative effect (ASBBDRE and CSBBDRE), percent change in number of particles larger than 80 nm due to biomass burning (BBN80), and biomass burning aerosol indirect effect (BBAIE). #### File: GCT\_Output\_STANDARD.nc **Description:** NetCDF of GEOS-Chem-TOMAS output in 2019 and 2020 for the STANDARD configuration of biomass burning plume injection height. Contains: Surface PM2.5 (PM), Surface PM2.5 from biomass burning (BBPM), column integrated organic aerosol and black carbon from biomass burning (BBOA and BBBC), all-sky and clear-sky biomass burning direct radiative effect (ASBBDRE and CSBBDRE), percent change in number of particles larger than 80 nm due to biomass burning (BBN80), and biomass burning aerosol indirect effect (BBAIE).