Oxidized nitrogen-containing organic compounds formation enhanced the light absorption of PM2.5 brown carbon

Wang, Diwei; Shen, Zhenxing; Bai, Gezi; Zhang, Leiming; Huang, Shasha; Zheng, Honghao; Li, Cailan; Sun, Jian; Xu, Hongmei; Cao, Junji

Oxidized nitrogen-containing organic compounds formation enhanced the light absorption of PM2.5 brown carbon

Simple item page

Full item details

dc.contributor.author: Wang, Diwei; Shen, Zhenxing; Bai, Gezi; Zhang, Leiming; Huang, Shasha; Zheng, Honghao; Li, Cailan; Sun, Jian; Xu, Hongmei; Cao, Junji
dc.date.accepted: 2025-01-27
dc.date.accessioned: 2025-05-29T17:20:03Z
dc.date.available: 2025-05-29T17:20:03Z
dc.date.issued: 2025-02-06
dc.date.submitted: 2024-11-13
dc.description.abstract - en: Brown carbon (BrC) is known to have a great impact on atmospheric radiative forcing, but its absorption characteristics at the molecular level is not well understood. This study investigated the seasonal variations of light absorption characteristics and molecular composition of BrC in Xi’an, China. Results showed that BrC exhibited higher light absorption capacity in cold (autumn and winter) than warm seasons (spring and summer). Nitrogen-containing organic compounds were identified as important BrC chromophores. Oxidized-N compounds originated from biomass burning emissions and NOx/NO3− mediated oxidation reactions were predominant in cold seasons, while reduced-N compounds mainly formed from NH3/NH4+ mediated reactions were abundant in warm seasons. These results contribute to a better understanding of formation mechanisms and light absorption characteristics of nitrogen-containing BrC chromophores in PM2.5.
dc.description.fosrcfull - en: An edited version of this paper was published by AGU. Published 2025 American Geophysical Union.
dc.description.fosrcfull-fosrctranslation - fr: Une version éditée de cet article a été publiée par l'AGU. Publié 2025 American Geophysical Union.
dc.identifier.issn: 2169-8996; 2169-897X
dc.identifier.uri: https://open-science.canada.ca/handle/123456789/3634
dc.language.iso: en
dc.publisher - en: American Geophysical Union
dc.relation.isreplacedby: https://doi.org/10.1029/2024JD042960
dc.rights - en: Other
dc.rights - fr: Autre
dc.rights.openaccesslevel - en: Green
dc.rights.openaccesslevel - fr: Vert
dc.rights.uri - en: #description-element
dc.rights.uri - fr: #description-element
dc.subject - en: Air pollution; Urban environment; Air quality; Atmospheric emissions
dc.subject - fr: Pollution atmosphérique; Milieu urbain; Qualité de l'air; Émissions atmosphériques
dc.subject.en - en: Air pollution; Urban environment; Air quality; Atmospheric emissions
dc.subject.fr - fr: Pollution atmosphérique; Milieu urbain; Qualité de l'air; Émissions atmosphériques
dc.title - en: Oxidized nitrogen-containing organic compounds formation enhanced the light absorption of PM2.5 brown carbon
dc.type - en: Accepted manuscript
dc.type - fr: Manuscrit accepté
local.article.journalissue: 3
local.article.journaltitle - en: Journal of Geophysical Research: Atmospheres
local.article.journalvolume: 130
local.pagination: 39 pages
local.peerreview - en: Yes
local.peerreview - fr: Oui