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Light Absorption by Organic Aerosol Emissions Rivals That of Black Carbon from Residential Biomass Fuels in South Asia
journal contribution
posted on 2020-03-12, 19:04 authored by Apoorva Pandey, Alice Hsu, Suresh Tiwari, Shamsh Pervez, Rajan K. ChakrabartySolid-biomass-fuel residential cookstoves
are the largest source
of aerosol emissions in the Indian subcontinent. For assessing radiative
forcing due to this pollutant source, laboratory-generated cookstove
performance data sets are currently used, which have established black
carbon (BC) as the dominant atmospheric-warming aerosol species. We
report findings on the strong near-ultraviolet wavelength absorption
characteristics of emitted organic carbon (OC) aerosols from household
stove combustion of nationally representative biomass fuels. OC emissions
from cookstoves have been conventionally parametrized in regional
climate models to be nonlight-absorbing in the visible solar spectra.
We conclude that light-absorbing OC contributes roughly as much as
BC to total absorption cross sections, thereby enhancing the associated
positive forcing estimates. Our findings underscore the importance
of including light-absorbing OC within the subcontinent’s air
quality and climate impact assessment frameworks.
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BCatmospheric-warming aerosol specieslight-absorbing OCclimate impact assessment frameworkslaboratory-generated cookstove performance data setssourcefindingnear-ultraviolet wavelength absorption characteristicsOrganic Aerosol Emissions RivalsResidential Biomass Fuelsemissionhousehold stove combustionrepresentative biomass fuelssubcontinentSouth Asia Solid-biomass-fuel
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