| Autor: |
Deepika Bhattu, Sachchida Nand Tripathi, Himadri Sekhar Bhowmik, Vaios Moschos, Chuan Ping Lee, Martin Rauber, Gary Salazar, Gülcin Abbaszade, Tianqu Cui, Jay G. Slowik, Pawan Vats, Suneeti Mishra, Vipul Lalchandani, Rangu Satish, Pragati Rai, Roberto Casotto, Anna Tobler, Varun Kumar, Yufang Hao, Lu Qi, Peeyush Khare, Manousos Ioannis Manousakas, Qiyuan Wang, Yuemei Han, Jie Tian, Sophie Darfeuil, Mari Cruz Minguillon, Christoph Hueglin, Sébastien Conil, Neeraj Rastogi, Atul Kumar Srivastava, Dilip Ganguly, Sasa Bjelic, Francesco Canonaco, Jürgen Schnelle-Kreis, Pamela A. Dominutti, Jean-Luc Jaffrezo, Sönke Szidat, Yang Chen, Junji Cao, Urs Baltensperger, Gaëlle Uzu, Kaspar R. Daellenbach, Imad El Haddad, André S. H. Prévôt |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Nature Communications, Vol 15, Iss 1, Pp 1-13 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2041-1723 |
| DOI: |
10.1038/s41467-024-47785-5 |
| Popis: |
Abstract 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. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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