MAX-DOAS observations of ship emissions in the North Sea.

Autor: Mahajan AS; Indian Institute of Tropical Meteorology, Pune, India; IMT Nord Europe, Institut Mines-Télécom, University of Lille, Centre for Energy and Environment, F-59000 Lille, France. Electronic address: anoop@tropmet.res.in., Tinel L; IMT Nord Europe, Institut Mines-Télécom, University of Lille, Centre for Energy and Environment, F-59000 Lille, France., Riffault V; IMT Nord Europe, Institut Mines-Télécom, University of Lille, Centre for Energy and Environment, F-59000 Lille, France., Guilbaud S; ATMO Hauts-de-France, 59800 Lille, France., D'Anna B; Université d'Aix-Marseille, CNRS, Laboratoire Chimie Environnement, Marseille 13331, France., Cuevas C; Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Blas Cabrera, CSIC, Madrid, Spain., Saiz-Lopez A; Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Blas Cabrera, CSIC, Madrid, Spain.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2024 Sep; Vol. 206, pp. 116761. Date of Electronic Publication: 2024 Jul 30.
DOI: 10.1016/j.marpolbul.2024.116761
Abstrakt: Shipping emissions were measured in Dunkirk, France. Elevated aerosol extinction coefficients (AEC), nitrogen dioxide (NO 2 ) and sulphur dioxide (SO 2 ) were observed up to 500 m from surface. Formaldehyde (HCHO) did not show an increase every time, which suggests that oxidation of emitted volatile organic compounds (VOCs) took longer than the transport to the observation path and dilution of direct emissions had occurred. Background NO 2, HCHO, and SO 2 levels were higher when the wind came over land or the surrounding industrial area, indicating that land-based sources contribute significantly; however, clear spikes in NO 2 and SO 2 were observed whenever ship plumes were sampled. Observations show that the ship emission contribution to pollution is significant, but land-based sources still dominate. The SO 2 /NO 2 ratio was low throughout the campaign, although varying according to the ship type, confirming that the new fuel content regulations are being followed by most ships in this region.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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