Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 21, issue 14
Articles | Volume 21, issue 14
https://doi.org/10.5194/acp-21-10881-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-10881-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 14
Research article
 | 
20 Jul 2021
Research article |  | 20 Jul 2021

Seasonal distribution and drivers of surface fine particulate matter and organic aerosol over the Indo-Gangetic Plain

Caterina Mogno, Paul I. Palmer, Christoph Knote, Fei Yao, and Timothy J. Wallington

Data sets

FINN data: fire emissions factors and inventories NCAR https://www.acom.ucar.edu/Data/fire/

WRF-Chem Tools for the Community ACOM-NCAR https://www2.acom.ucar.edu/wrf-chem/wrf-chem-tools-community

NCEP GDAS/FNL 0.25 Degree Global Tropospheric Analyses and Forecast Grids National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce https://doi.org/10.5065/D65Q4T4Z

Model code and software

catemgn/AQ-IGP: model setup files and code scripts for analysis. Caterina Mogno https://doi.org/10.5281/zenodo.5006025

WRF-Chem model code University Corporation for Atmospheric Research https://www2.mmm.ucar.edu/wrf/users/download/get_source.html

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Short summary
We use a 3-D atmospheric chemistry model to investigate how seasonal emissions sources and meteorological conditions affect the surface distribution of fine particulate matter (PM2.5) and organic aerosol (OA) over the Indo-Gangetic Plain. We find that all seasonal mean values of PM2.5 still exceed safe air quality levels, with human emissions contributing to PM2.5 all year round, open fires during post- and pre-monsoon, and biogenic emissions during monsoon. OA contributes up to 30 % to PM2.5.
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