Sulfur, oxygen, and hydrogen isotope compositions of precipitation in Seoul, South Korea

Lim, Cheol-Il; Lee, Insung; Lee, Sang-Mook; Yu, Jae‐Young; Kaufman, Alan J.

doi:10.2343/geochemj.1.0173

Cited by 9 publications

(1 citation statement)

References 38 publications

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“…Multiple S-isotope ( 32 S, 33 S, 34 S, and 36 S) analysis has proven to be useful for a wide array of applications. − In general, the isotope ratios of any two isotopes can be scaled to each other based on the mass i.e., “mass-dependent fractionation (MDF)” model. , The S-isotopic compositions vary with sources and cycling pathways e.g., in geochemical, biological, and atmospheric processes. − However, the main sulfur emissions within a specific regional reservoir possess distinctive characteristics of sulfur isotopic values, making it feasible to conduct source tracing, e.g., refs − . The δ 34 S (see the Materials and Methods section) signatures of various sources of atmospheric sulfate are disparate (SI Figure S1) and, as such, can be used for determining the origin of atmospheric sulfate e.g., refs − . However, an inherent issue is the broad diversity in the regional S-isotopic signatures for the two likely drivers of anthropogenic SO 2 emissions i.e., coal combustion (e.g., thermal power plants) and oil combustion (e.g., vehicular emissions) (SI Table S1).…”

Section: Introductionmentioning

confidence: 99%

Retrospective Isotopic Analysis of Summertime Urban Atmospheric Sulfate in South Asia Using Improved Source Constraints

Dasari,

Widory

2024

ACS EST Air

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The emissions of sulfur dioxide (SO 2 ), a harmful atmospheric pollutant, are on the rise in South Asia. Sulfate, formed from the oxidation of SO 2 , often comprises 10%−67% of aerosol mass and has a profound impact on climate, air quality/human health, and the environment. The potential drivers of sulfatelinked urban air pollution in South Asian megacities�facing a choking air pollution crisis�remain poorly understood due to a lack of systematic observations. Here, we conducted stable S-isotope (δ 34 S) fingerprinting of sulfate aerosols in summertime megacity Delhi in South Asia to evaluate the potential drivers. With newly developed region-specific isotopic endmembers in this study, a statistical source apportionment of urban atmospheric sulfate was feasible. Results show that coal combustion (80 ± 12%) and oil combustion (14 ± 11%), followed by road dust (4 ± 3%) and biomass burning (2 ± 2%), were major contributors to atmospheric sulfate in summertime Delhi. Retrospective analysis showed a marked isotopic shift in stable sulfate isotopic composition in summertime megacity Delhi wherein the average δ 34 S value was 4 ± 1‰ in 2015 and 2 ± 1‰ in 2021, respectively. This was evidently linked to changes in the dominant fuel type as sulfate sourced from coal combustion (oil combustion) significantly increased ∼ 20% (decreased ∼ 20%) during this period. With no clear increase in the number of thermal power plants in and around Delhi, we speculate that the substantial increase in coal-derived sulfate could plausibly be linked to a rise in the informal industries such as brick production and food and agricultural product processing operations, whose SO 2 emissions remain challenging to estimate. While further observations from the region are warranted, the findings here suggest that the continued dependence on coal in developing nations of South Asia could be one of the reasons for rising SO 2 levels.

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Section: Introductionmentioning

confidence: 99%

Retrospective Isotopic Analysis of Summertime Urban Atmospheric Sulfate in South Asia Using Improved Source Constraints

Dasari,

Widory

2024

ACS EST Air

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Method development for on-line species-specific sulfur isotopic analysis by means of capillary electrophoresis/multicollector ICP-mass spectrometry

et al. 2020

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In this paper, we investigate the performance of optical packet switches. Optical packet switches are operated entirely in the optical domain (except for the header extraction). The optical buffering is realised by using fiber delay lines (FDL's). We analyse, using generating functions, an optical buffering structure, consisting of FDL's with increasing lengths. We use this analysis to investigate the packet loss rate (PLR) in two types of switches with output buffering.

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Interpreting complex geochemistry of groundwater in a coastal paddy field near a mine using isotopic signatures of sulfate and water

Kim

Kwon²,

et al. 2021

Environ Geochem Health

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Sulfur, oxygen, and hydrogen isotope compositions of precipitation in Seoul, South Korea

Cited by 9 publications

References 38 publications

Retrospective Isotopic Analysis of Summertime Urban Atmospheric Sulfate in South Asia Using Improved Source Constraints

Retrospective Isotopic Analysis of Summertime Urban Atmospheric Sulfate in South Asia Using Improved Source Constraints

Method development for on-line species-specific sulfur isotopic analysis by means of capillary electrophoresis/multicollector ICP-mass spectrometry

Interpreting complex geochemistry of groundwater in a coastal paddy field near a mine using isotopic signatures of sulfate and water

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