Characterization of the nitrogen stable isotope composition (<italic>δ</italic><sup>15</sup>N) of ship-emitted NO<sub><italic>x</italic></sub>
Abstract δ 15 x) is a powerful indicator of source apportionment of atmospheric NOx; however, δ 15 x values emitted from ships have not been reported, affecting the accuracy of source partitioning of atmospheric NOx in coastal zones with a lot of vessel activity. In addition, δ 15 x values from ship emissions could also be important for source apportionment of atmospheric nitrogen deposition in remote ocean regions. This study systemically analysed the δ 15 x variability and main influencing factors of ship emissions. The results showed that δ 15 x values from ships, which were calculated by weighting the emission values from the main engine and auxiliary engine of the vessel, ranged from - ± - ± δ 15 x values increased monotonically with the ongoing tightening of emission regulations, presenting a significantly negative logarithmic relationship with NOx concentrations (p < 0.01). The selective catalytic reduction (SCR) system was the most important factor affecting changes in δ 15 x values, followed by the ship category, fuel types, and operation states of ships. Based on the relationship between δ 15 x values and emission regulations observed in this investigation, a mass-weighted model to compute accurate assessments over time was developed, and the temporal variation in δ 15 x values from ship emissions in the international merchant fleet was evaluated. These simulated δ 15 x values can be used to select suitable δ 15 x values for a more accurate assessment, including the contribution of ship-emitted exhaust to atmospheric NOx and its influence on atmospheric nitrate (NO3 -) air quality and nitrogen deposition studies.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
-
Online-Ressource
- Sprache
-
Englisch
- Erschienen in
-
Characterization of the nitrogen stable isotope composition (
δ 15N) of ship-emitted NOx ; volume:23 ; number:19 ; year:2023 ; pages:12851-12865 ; extent:15
Atmospheric chemistry and physics ; 23, Heft 19 (2023), 12851-12865 (gesamt 15)
- Urheber
-
Sun, Zeyu
Zong, Zheng
Tan, Yang
Tian, Chongguo
Liu, Zeyu
Zhang, Fan
Sun, Rong
Chen, Yingjun
Li, Jun
Zhang, Gan
- DOI
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10.5194/acp-23-12851-2023
- URN
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urn:nbn:de:101:1-2023101904281541820087
- Rechteinformation
-
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
- 14.08.2025, 10:44 MESZ
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Beteiligte
- Sun, Zeyu
- Zong, Zheng
- Tan, Yang
- Tian, Chongguo
- Liu, Zeyu
- Zhang, Fan
- Sun, Rong
- Chen, Yingjun
- Li, Jun
- Zhang, Gan
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