Comment on acp-2022-813 Article Swipe
Shuhui Zhu
,
Min Zhou
,
Liping Qiao
,
Dan Dan Huang
,
Qiongqiong Wang
,
Shan Wang
,
Yaqin Gao
,
Shengao Jing
,
Qian Wang
,
Hongli Wang
,
Changhong Chen
,
Cheng Huang
,
Jian Zhen Yu
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.5194/acp-2022-813-rc2
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.5194/acp-2022-813-rc2
Abstract. Organic aerosol (OA) is a significant part of urban fine particulate matter (PM2.5) and a lack of detailed knowledge of their sources has increasingly hindered the improvement of air quality in China in recent years as significant reductions have been achieved in inorganic ion constituents. In this study, a wide range of organic molecular markers in PM2.5 were monitored with a bihourly time resolution using a Thermal desorption Aerosol Gas chromatograph system (TAG) in urban Shanghai in winter 2019. The molecular marker data have provided a unique source tracking ability in characterizing the evolution of organic aerosols during nine wintertime episodic events. Episodes primarily influenced by local air masses were characterized with higher proportions and mass increments of secondary OA. Rapid elevation in both absolute mass concentration and relative proportion was observed for primary and secondary OA markers indicative of vehicle emissions (e.g., alkanes, hopanes, and 2,3-dihydroxy-4-oxopentanoic acid), as well as cooking activities (e.g., saturated and unsaturated fatty acids, and C9 acids). In comparison, episodes under significant influences of transported air mass were typically associated with a predominant PM2.5 contribution from secondary inorganic aerosols and enhanced OA contribution from biomass burning activities. The latter was evident from the tracer data (e.g., levoglucosan, aromatic polycarboxylic acids, and nitro-aromatic compounds). Secondary OA markers associated with later generation products of hydrocarbon oxidation process, such as C3–5 dicarboxylic acids, were the most deficient during local episodes while notably enhanced during the episodes under influence of transported air masses, reflecting different extent and pathways of atmospheric aging processing. The ability of distinguishing the variations of OA evolution during different types of episodes demonstrates the value of online organic molecular measurements to episodic analysis. The results indicate that control of local urban sources such as vehicular and cooking emissions would lessen severity of local episodes while regional control of precursors for secondary inorganic aerosols and biomass burning activities would reduce PM2.5 episodes under synoptic conditions conducive for regional transport.
Related Topics
Concepts
Metadata
- Type
- peer-review
- Language
- en
- Landing Page
- https://doi.org/10.5194/acp-2022-813-rc2
- https://acp.copernicus.org/preprints/acp-2022-813/acp-2022-813.pdf
- OA Status
- gold
- References
- 66
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4362512954
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
-
https://openalex.org/W4362512954Canonical identifier for this work in OpenAlex
- DOI
-
https://doi.org/10.5194/acp-2022-813-rc2Digital Object Identifier
- Title
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Comment on acp-2022-813Work title
- Type
-
peer-reviewOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2023Year of publication
- Publication date
-
2023-04-03Full publication date if available
- Authors
-
Shuhui Zhu, Min Zhou, Liping Qiao, Dan Dan Huang, Qiongqiong Wang, Shan Wang, Yaqin Gao, Shengao Jing, Qian Wang, Hongli Wang, Changhong Chen, Cheng Huang, Jian Zhen YuList of authors in order
- Landing page
-
https://doi.org/10.5194/acp-2022-813-rc2Publisher landing page
- PDF URL
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https://acp.copernicus.org/preprints/acp-2022-813/acp-2022-813.pdfDirect link to full text PDF
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://acp.copernicus.org/preprints/acp-2022-813/acp-2022-813.pdfDirect OA link when available
- Concepts
-
Levoglucosan, Chemistry, Aerosol, Environmental chemistry, Particulates, Biomass burning, Organic chemistryTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- References (count)
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66Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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