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Local incomplete combustion emissions define the PM 2.5 oxidative potential in Northern India

Nature communications, 2024-04, Vol.15 (1), p.3517 [Peer Reviewed Journal]

2024. The Author(s). ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-024-47785-5 ;PMID: 38664406

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Title:
Local incomplete combustion emissions define the PM 2.5 oxidative potential in Northern India
Author: Bhattu, Deepika ; Tripathi, Sachchida Nand ; Bhowmik, Himadri Sekhar ; Moschos, Vaios ; Lee, Chuan Ping ; Rauber, Martin ; Salazar, Gary ; Abbaszade, Gülcin ; Cui, Tianqu ; Slowik, Jay G ; Vats, Pawan ; Mishra, Suneeti ; Lalchandani, Vipul ; Satish, Rangu ; Rai, Pragati ; Casotto, Roberto ; Tobler, Anna ; Kumar, Varun ; Hao, Yufang ; Qi, Lu ; Khare, Peeyush ; Manousakas, Manousos Ioannis ; Wang, Qiyuan ; Han, Yuemei ; Tian, Jie ; Darfeuil, Sophie ; Minguillon, Mari Cruz ; Hueglin, Christoph ; Conil, Sébastien ; Rastogi, Neeraj ; Srivastava, Atul Kumar ; Ganguly, Dilip ; Bjelic, Sasa ; Canonaco, Francesco ; Schnelle-Kreis, Jürgen ; Dominutti, Pamela A ; Jaffrezo, Jean-Luc ; Szidat, Sönke ; Chen, Yang ; Cao, Junji ; Baltensperger, Urs ; Uzu, Gaëlle ; Daellenbach, Kaspar R ; El Haddad, Imad ; Prévôt, André S H
Subjects: Environmental Sciences
Is Part Of: Nature communications, 2024-04, Vol.15 (1), p.3517
Description: The oxidative potential (OP) of particulate matter (PM) is a major driver of PM-associated health effects. In India, the emission sources defining PM-OP, and their local/regional nature, are yet to be established. Here, to address this gap we determine the geographical origin, sources of PM, and its OP at five Indo-Gangetic Plain sites inside and outside Delhi. Our findings reveal that although uniformly high PM concentrations are recorded across the entire region, local emission sources and formation processes dominate PM pollution. Specifically, ammonium chloride, and organic aerosols (OA) from traffic exhaust, residential heating, and oxidation of unsaturated vapors from fossil fuels are the dominant PM sources inside Delhi. Ammonium sulfate and nitrate, and secondary OA from biomass burning vapors, are produced outside Delhi. Nevertheless, PM-OP is overwhelmingly driven by OA from incomplete combustion of biomass and fossil fuels, including traffic. These findings suggest that addressing local inefficient combustion processes can effectively mitigate PM health exposure in northern India.
Publisher: England: Nature Publishing Group
Language: English
Identifier: ISSN: 2041-1723
EISSN: 2041-1723
DOI: 10.1038/s41467-024-47785-5
PMID: 38664406
Source: AUTh Library subscriptions: ProQuest Central
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Local incomplete combustion emissions define the PM 2.5 oxidative potential in Northern India

2024. The Author(s). ;Distributed under a Creative Commons Attribution 4.0 International License ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-024-47785-5 ;PMID: 38664406

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