Advances in Organic Aerosol Characterization: From Complex to Simple

Gilardoni, Stefania

doi:10.4209/aaqr.2017.01.0007

Cited by 6 publications

(1 citation statement)

References 34 publications

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“…Organic aerosols (OAs) are abundant in the troposphere and are crucial determinants of air quality and climate (Decesari et al, 2001;Kanakidou et al, 2005). OAs are emitted directly to the atmosphere from primary sources (Gilardoni, 2017;Khan et al, 2018). They are also secondarily produced in the atmosphere by the photochemical oxidation of volatile organic compounds (VOCs) (Kroll and Seinfeld, 2008;Shiraiwa et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

High Loadings of Water-Soluble Oxalic Acid and Related Compounds in PM2.5 Aerosols in Eastern Central India: Influence of Biomass Burning and Photochemical Processing

Deshmukh

Kawamura

Gupta

et al. 2019

Aerosol Air Qual. Res.

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Water-soluble organic compounds are important constituents of atmospheric aerosols and have been recognized as unique fingerprints to identify atmospheric processes. Fine aerosol samples (PM 2.5) were collected at Ambikapur (23.1°N and 83.2°E) in eastern central India from March to June 2017. The samples were analyzed for water-soluble dicarboxylic acids (C 2-C 12), glyoxylic acid (ωC 2), glyoxal (Gly), methylglyoxal (MeGly), organic carbon (OC), elemental carbon (EC) and water-soluble OC (WSOC). Oxalic acid (C 2) was detected as the most abundant species, followed by succinic (C 4) and malonic (C 3) acids. Temporal variation in concentrations of C 2 diacid and related compounds was pronounced from early to late April when biomass burning (BB) was dominant in eastern central India. Strong positive correlations of C 2 diacid and related compounds with levoglucosan (r = 0.83-0.99) further demonstrate that organic aerosols (OAs) were affected by BB in eastern central India. Strong positive correlations of C 2 with saturated diacids (C 3-C 9 : r = 0.78-0.97), ωC 2 (r = 0.98), Gly (r = 0.96) and MeGly (r = 0.84) suggest that their sources and formation processes were similar and oxalic acid might be produced via the photochemical degradation of precursor compounds. The relatively high ratios of WSOC to OC (avg. 0.69) and C 3 to C 4 diacid (avg. 0.95) suggest that water-soluble OAs were photochemically processed during the campaign. The total water-soluble organic compounds detected in Ambikapur PM 2.5 samples accounted for an average of 1.9% (1.1-3.1%) of OC. Our results demonstrate that BB and photochemical processing caused high levels of water-soluble organic compounds over eastern central India.

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Section: Introductionmentioning

confidence: 99%

High Loadings of Water-Soluble Oxalic Acid and Related Compounds in PM2.5 Aerosols in Eastern Central India: Influence of Biomass Burning and Photochemical Processing

Deshmukh

Kawamura

Gupta

et al. 2019

Aerosol Air Qual. Res.

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Emissions

Urbanski

O’Neill

Holder

et al. 2022

Wildland Fire Smoke in the United States

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This chapter assesses the current state of the science regarding the composition, intensity, and drivers of wildland fire emissions in the USA and Canada. Globally and in the USA wildland fires are a major source of gases and aerosols which have significant air quality impacts and climate interactions. Wildland fire smoke can trigger severe pollution episodes with substantial effects on public health. Fire emissions can degrade air quality at considerable distances downwind, hampering efforts by air regulators to meet air standards. Fires are a major global source of aerosols which affect the climate system by absorbing and scattering radiation and by altering optical properties, coverage, and lifetime of clouds. A thorough understanding of fire emissions is essential for effectively addressing societal and climate consequences of wildland fire smoke.

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