TY - JOUR
T1 - Local incomplete combustion emissions define the PM2.5 oxidative potential in Northern India
AU - Bhattu, Deepika
AU - Tripathi, Sachchida Nand
AU - Bhowmik, Himadri Sekhar
AU - Moschos, Vaios
AU - Lee, Chuan Ping
AU - Rauber, Martin
AU - Salazar, Gary
AU - Abbaszade, Gülcin
AU - Cui, Tianqu
AU - Slowik, Jay G.
AU - Vats, Pawan
AU - Mishra, Suneeti
AU - Lalchandani, Vipul
AU - Satish, Rangu
AU - Rai, Pragati
AU - Casotto, Roberto
AU - Tobler, Anna
AU - Kumar, Varun
AU - Hao, Yufang
AU - Qi, Lu
AU - Khare, Peeyush
AU - Manousakas, Manousos Ioannis
AU - Wang, Qiyuan
AU - Han, Yuemei
AU - Tian, Jie
AU - Darfeuil, Sophie
AU - Minguillon, Mari Cruz
AU - Hueglin, Christoph
AU - Conil, Sébastien
AU - Rastogi, Neeraj
AU - Srivastava, Atul Kumar
AU - Ganguly, Dilip
AU - Bjelic, Sasa
AU - Canonaco, Francesco
AU - Schnelle-Kreis, Jürgen
AU - Dominutti, Pamela A.
AU - Jaffrezo, Jean Luc
AU - Szidat, Sönke
AU - Chen, Yang
AU - Cao, Junji
AU - Baltensperger, Urs
AU - Uzu, Gaëlle
AU - Daellenbach, Kaspar R.
AU - El Haddad, Imad
AU - Prévôt, André S.H.
N1 - Publisher Copyright:
© The Author(s) 2024.
PY - 2024/12
Y1 - 2024/12
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85191331044
U2 - 10.1038/s41467-024-47785-5
DO - 10.1038/s41467-024-47785-5
M3 - 文章
C2 - 38664406
AN - SCOPUS:85191331044
SN - 2041-1723
VL - 15
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 3517
ER -