Atmospheric measurements at Mt. Tai – Part II: HONO budget and radical (RO<sub><italic>x</italic></sub>&thinsp;+&thinsp;NO<sub>3</sub>) chemistry in the lower boundary layer

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Abstract + - 1 2 uptake on the ground surface dominated (∼ ∼ Δ/Δ NOx ratio of 0.7 % for direct emissions from vehicle exhaust was inferred, and a new method to quantify its contribution to the observations was proposed and discussed. Aerosol-derived sources, including the NO2 uptake on the aerosol surface and the particulate nitrate photolysis, did not lead to significant HONO formation, with their contributions lower than NO + 3 photolysis to OH initiation. Moreover, we found that OH dominated the atmospheric oxidizing capacity in the daytime, while modeled NO3 appeared to be significant at night. Peaks of modeled NO3 time series and average diurnal variation reached 22 and 9 pptv, respectively. NO3 -induced reactions contribute 18 % of nitrate formation potential (P 3)) and 11 % of the isoprene (C5 H8) oxidation throughout the whole day. At night, NO3 chemistry led to 51 % and 44 % of P 3) or the C5 H8 oxidation, respectively, implying that NO3 chemistry could significantly affect nighttime secondary organic and inorganic aerosol formation in this high-O3 region. Considering the severe O3 pollution in the NCP and the very limited NO3 measurements, we suggest that besides direct measurements of HOx and primary HOx precursors (O3, HONO, alkenes, etc.), NO3 measurements should be conducted to understand the atmospheric oxidizing capacity and air pollution formation in this and similar regions.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Atmospheric measurements at Mt. Tai – Part II: HONO budget and radical (ROx + NO3) chemistry in the lower boundary layer ; volume:22 ; number:2 ; year:2022 ; pages:1035-1057 ; extent:23
Atmospheric chemistry and physics ; 22, Heft 2 (2022), 1035-1057 (gesamt 23)

Creator
Xue, Chaoyang
Ye, Can
Kleffmann, Jörg
Zhang, Wenjin
He, Xiaowei
Liu, Pengfei
Zhang, Chenglong
Zhao, Xiaoxi
Liu, Chengtang
Ma, Zhuobiao
Liu, Junfeng
Wang, Jinhe
Lu, Keding
Catoire, Valéry
Mellouki, Abdelwahid
Mu, Yujing

DOI
10.5194/acp-22-1035-2022
URN
urn:nbn:de:101:1-2022012704265333881965
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:23 AM CEST

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Associated

  • Xue, Chaoyang
  • Ye, Can
  • Kleffmann, Jörg
  • Zhang, Wenjin
  • He, Xiaowei
  • Liu, Pengfei
  • Zhang, Chenglong
  • Zhao, Xiaoxi
  • Liu, Chengtang
  • Ma, Zhuobiao
  • Liu, Junfeng
  • Wang, Jinhe
  • Lu, Keding
  • Catoire, Valéry
  • Mellouki, Abdelwahid
  • Mu, Yujing

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