Chemical interactions between ship-originated air pollutants and ocean-emitted halogens
Li, Qinyi (Instituto de Química Física "Rocasolano")
Badia, Alba (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Fernandez, Rafael Pedro (Instituto de Química Física "Rocasolano")
Mahajan, Anoop S. (Indian Institute of Tropical Meteorology. Centre for Climate Change Research (India))
López-Noreña, Ana Isabel (Universidad Tecnológica Nacional. Grupo de Estudios Atmosféricos y Ambientales (Argentina))
Zhang, Yan (Fudan University. Department of Environmental Science and Engineering. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (China))
Wang, Shanshan (Fudan University. Department of Environmental Science and Engineering. Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (China))
Puliafito, Enrique (Universidad Tecnológica Nacional. Grupo de Estudios Atmosféricos y Ambientales (Argentina))
Cuevas Rodríguez, Carlos Alberto (Instituto de Química Física "Rocasolano")
Saiz-Lopez, Alfonso (Instituto de Química Física "Rocasolano")

Date:	2021
Abstract:	Ocean-going ships supply products from one region to another and contribute to the world's economy. Ship exhaust contains many air pollutants and results in significant changes in marine atmospheric composition. The role of reactive halogen species (RHS) in the troposphere has received increasing recognition and oceans are the largest contributors to their atmospheric burden. However, the impact of shipping emissions on RHS and that of RHS on ship-originated air pollutants have not been studied in detail. Here, an updated Weather Research Forecasting coupled with Chemistry model is utilized to explore the chemical interactions between ship emissions and oceanic RHS over the East Asia seas in summer. The emissions and resulting chemical transformations from shipping activities increase the level of NO and NO at the surface, increase O in the South China Sea, but decrease O in the East China Sea. Such changes in pollutants result in remarkable changes in the levels of RHS (>200% increase of chlorine; ∼30% and ∼5% decrease of bromine and iodine, respectively) as well as in their partitioning. The abundant RHS, in turn, reshape the loadings of air pollutants (∼20% decrease of NO and NO; ∼15% decrease of O) and those of the oxidants (>10% reduction of OH and HO; ∼40% decrease of NO) with marked patterns along the ship tracks. We, therefore, suggest that these important chemical interactions of ship-originated emissions with RHS should be considered in the environmental policy assessments of the role of shipping emissions in air quality and climate.
Grants:	European Commission 726349
Note:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Air pollutants ; Oxidation ; Reactive halogen species ; Ship emission
Published in:	Journal of Geophysical Research. Atmospheres, Vol. 126, Issue 4 (February 2021) , art. e2020JD034175, ISSN 2169-8996

DOI: 10.1029/2020JD034175
PMID: 33816042

17 p, 5.8 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles