Gridded Emissions of CO, NO_x, SO₂, CO₂, NH₃, HCl, CH₄, PM_2.5, PM₁₀, BC, and NMVOC from Open Municipal Waste Burning in India

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Abstract

Accurate emission inventories serve as critical inputs for air quality and climate models but are poorly constrained over India. We present a new municipal open waste burning emission inventory from India (OWBEII), at a resolution of 0.1° × 0.1°. Out of the 216 (201-232) Tg y-1 of waste produced in the year 2015, 68 (45-105) Tg y-1 was burned in the open. To determine emissions from waste burning, emission factors of 59 non-methane volatile organic compounds (NMVOCs), CH₄, CO₂, CO, and NO _x were measured from garbage fires in rural and urban sites in India. The NMVOC emissions from open waste burning of 1.4-2 Tg y-1 increase India's total anthropogenic NMVOC budget by 8-12%, while BC emissions (40-110 Ggy-1) increase the total anthropogenic BC emissions by 8-12%. Open waste burning in India emits 3-7 Tg y-1 of CO and 58-130 Tg y-1 of CO₂. Emissions increase the total anthropogenic CO and CO₂ in the MIX-Asia inventory by 4-11% and 2-6%, respectively. Open waste burning may affect atmospheric OH reactivity and ozone formation rates downwind of urban centers through the emission of other highly reactive compounds such as acetaldehyde (20-320 Gg y-1), propene (50-170 Gg y-1), and ethene (50-190 Gg y-1) and is s source of carcinogenic benzene (30-280 Gg y-1).

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