Seasonal contribution of mineral dust and other major components to particulate matter at two remote sites in Central Asia

Miller-Schulze, Justin P.; Shafer, Martin M.; Schauer, James J.; Heo, Ji Hoe; Solomon, Paul A.; Lantz, Jeffrey; Artamonova, Maria; Chen, Boris; Imashev, Sanjar; Sverdlik, Leonid; Carmichael, G. R.; DeMinter, Jeff

doi:10.1016/j.atmosenv.2015.07.011

Cited by 28 publications

(10 citation statements)

References 32 publications

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“…The annual average dust deposition was 147.8, 194.9 and 663.6 t km −2 in northern, eastern and southern Xinjiang, respectively. Generally, the origin of mineral dust could be attributed to both natural and anthropogenic sources (Miller-Schulze et al, 2015). Although dust deposition was relatively low (< 150 t km −2 ) for the majority of stations in northern Xinjiang Province, dust deposition was at least 50 % higher for stations within the industrial belt on the northern slope of the Tianshan Mountains.…”

Section: Dust Depositionmentioning

confidence: 99%

“…Strong winds associated with this atmospheric circulation cause large amounts of dust to be emitted into the atmosphere. Deserts in central Asia are an important source of atmospheric mineral dust (Miller-Schulze et al, 2015). Under the strong westerly circulation, atmospheric dust can be transported a few hundred kilometers to the east and be deposited through wet scavenging and dry settling (Shao, 2000;Chen et al, 2014).…”

Section: Factors Influencing Dust Deposition and Pm 10 Concentrationmentioning

confidence: 99%

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Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

et al. 2017

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Abstract. Eolian dust transport and deposition are important geophysical processes which influence global biogeochemical cycles. Currently, reliable deposition data are scarce in central and east Asia. Located at the boundary of central and east Asia, Xinjiang Province of northwestern China has long played a strategic role in cultural and economic trade between Asia and Europe. In this paper, we investigated the spatial distribution and temporal variation in dust deposition and ambient PM 10

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Section: Dust Depositionmentioning

confidence: 99%

Section: Factors Influencing Dust Deposition and Pm 10 Concentrationmentioning

confidence: 99%

Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

et al. 2017

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“… 24 Dust mass was calculated as the sum of oxides of major crustal elements: 2.14*[Si] + 1.89*[Al] + 1.43*[Fe] + 1.40*[Ca] + 1.66*[Mg] + 1.67*[Ti] + 1.58*[Mn]. 45 , 46 Si concentrations were estimated using Al concentrations and typical crustal ratios. 47 …”

Section: Methodsmentioning

confidence: 99%

Chemical Investigation of Household Solid Fuel Use and Outdoor Air Pollution Contributions to Personal PM_2.5 Exposures

Lai

Lee

Carter

et al. 2021

Environ. Sci. Technol.

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In communities with household solid fuel use, transitioning to clean stoves/fuels often results in only moderate reductions in fine particulate matter (PM 2.5 ) exposures; the chemical composition of those exposures may help explain why. We collected personal exposure (men and women) and outdoor PM 2.5 samples in villages in three Chinese provinces (Shanxi, Beijing, and Guangxi) and measured chemical components, including water-soluble organic carbon (WSOC), ions, elements, and organic tracers. Source contributions from chemical mass balance modeling (biomass burning, coal combustion, vehicles, dust, and secondary inorganic aerosol) were similar between outdoor and personal PM 2.5 samples. Principal component analysis of organic and inorganic components identified analogous sources, including a regional ambient source. Chemical components of PM 2.5 exposures did not differ significantly by gender. Participants using coal had higher personal/outdoor (P/O) ratios of coal combustion tracers (picene, sulfate, As, and Pb) than those not using coal, but no such trend was observed for biomass burning tracers (levoglucosan, K + , WSOC). Picene and most levoglucosan P/O ratios exceeded 1 even among participants not using coal and biomass, respectively, indicating substantial indirect exposure to solid fuel emissions from other homes. Contributions of community-level emissions to exposures suggest that meaningful exposure reductions will likely require extensive fuel use changes within communities.

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“…Complement field sampling and analysis provide indirect evidence to support our hypothesis that intermediates CO3 •may affect sulfate formation in the atmosphere. Previously, it has been suggested that coarse-model particulate matter (PM) possesses a large mass fraction of mineral dust (Fang et al, 2017;Miller-Schulze et al, 2015), in which TiO2 was found at mass mixing ratios ranging from 0.1 to 10 % depending on the exact location where particles were uplifted (Hanisch and Crowley, 2003). In this case, PM with relatively larger size dimensions is expected to contribute to secondary sulfate formation via heterogeneous reactions, which is supported by the recent field study where carbonate fraction of coarse PM is evidenced to promote secondary sulfate production (Song et al, 2018).…”

Section: Field Measurements Of Sulfate and (Bi)carbonate Ionsmentioning

confidence: 99%

A Novel Pathway of Atmospheric Sulfate Formation Through Carbonate Radical

Liu

Deng

Liu

et al. 2021

Preprint

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Abstract. Carbon dioxide is considered an inert gas that rarely participates in atmospheric chemical reactions. However, we show here that CO2 is involved in some important photo-oxidation reactions in the atmosphere through the formation of carbonate radicals (CO3∙-). This potentially active intermediate CO3∙- is routinely overlooked in atmospheric chemistry regarding its effect on sulfate formation. Present work demonstrates that SO2 uptake coefficient is enhanced by 17 times on mineral dust particles driven by CO3∙-. It can be produced through two routes over mineral dust surfaces: i) hydroxyl radical + CO32-; ii) holes (h+) + CO32-. Employing a suite of laboratory investigations of sulfate formation in the presence of carbonate radical on the model and authentic dust particles, field measurements of sulfate and (bi)carbonate ions within ambient PM, together with density functional theory (DFT) calculations for single electron transfer processes in terms of CO3∙--initiated S(IV) oxidation, a new role of carbonate radical in atmospheric chemistry is elucidated.

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Seasonal contribution of mineral dust and other major components to particulate matter at two remote sites in Central Asia

Cited by 28 publications

References 32 publications

Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

Chemical Investigation of Household Solid Fuel Use and Outdoor Air Pollution Contributions to Personal PM_2.5 Exposures

A Novel Pathway of Atmospheric Sulfate Formation Through Carbonate Radical

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Seasonal contribution of mineral dust and other major components to particulate matter at two remote sites in Central Asia

Cited by 28 publications

References 32 publications

Dust deposition and ambient PM&lt;sub&gt;10&lt;/sub&gt; concentration in northwest China: spatial and temporal variability

Dust deposition and ambient PM&lt;sub&gt;10&lt;/sub&gt; concentration in northwest China: spatial and temporal variability

Chemical Investigation of Household Solid Fuel Use and Outdoor Air Pollution Contributions to Personal PM2.5 Exposures

A Novel Pathway of Atmospheric Sulfate Formation Through Carbonate Radical

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Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

Dust deposition and ambient PM<sub>10</sub> concentration in northwest China: spatial and temporal variability

Chemical Investigation of Household Solid Fuel Use and Outdoor Air Pollution Contributions to Personal PM_2.5 Exposures