Preprints
https://doi.org/10.5194/egusphere-2023-169
https://doi.org/10.5194/egusphere-2023-169
24 Feb 2023
 | 24 Feb 2023
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

Measurement report: A one-year study to estimate maritime contributions to PM10 in a coastal area in Northern France

Frédéric Ledoux, Cloé Roche, Gilles Delmaire, Gilles Roussel, Olivier Favez, Marc Fadel, and Dominique Courcot

Abstract. This work is focused on filling the lack of knowledge associated with natural and anthropogenic marine emissions on PM10 concentrations in Northern France. For this purpose, a one-year measurement and sampling campaign for PM10 has been performed at a French coastal site situated in front of the Straits of Dover. The characterization of PM10 samples was performed considering major and trace elements, water-soluble ions, organic carbon (OC), elemental carbon (EC), and organic markers of biomass burning and primary biogenic emissions. Furthermore, the source apportionment of PM10 was achieved using the constrained weighted-non-negative matrix factorization (CW-NMF) model. The annual average PM10 was 24.3 µg/m3 with six species contributing to 69 % of its mass (NO3-, OC, SO42-, Cl-, Na+, and NH4+). The source apportionment of PM10 led to the identification of 10 sources. Fresh and aged sea-salts contributed to 37 % of PM10, while secondary nitrate and sulfate contributed 41 %, biomass burning 10 %, and Heavy Fuel Oil (HFO) combustion from shipping emissions contributed 5 %, on yearly averages. Additionally, monthly evolution of the sources’ contribution evidenced different behaviors with high contributions of secondary nitrate and biomass burning during winter. In the summer season, 10 times higher concentrations for HFO combustion (July compared to January) and the predominance of aged sea-salts versus fresh sea-salts were observed. Constant weighted trajectories showed that the sources contributing to more than 80 % of PM10 at Cape Gris-Nez are of regional and/or long-range origins with the North Sea and the English Channel as hotspots for natural and anthropogenic marine emissions and Belgium, the Netherlands, and the West of Germany as hotspots for secondary inorganic aerosols.

Frédéric Ledoux et al.

Status: open (until 27 Apr 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-169', Anonymous Referee #1, 19 Mar 2023 reply
    • AC1: 'Reply on RC1', Marc Fadel, 28 Mar 2023 reply

Frédéric Ledoux et al.

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Data for "Measurement report: A one-year study to estimate maritime contributions to PM10 in a coastal area in Northern France." Frédéric Ledoux, Cloé Roche, Gilles Delmaire, Gilles Roussel, Olivier Favez, Marc Fadel, and Dominique Courcot https://doi.org/10.5281/zenodo.7664528

Frédéric Ledoux et al.

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Short summary
The objective of this work is to quantify the emissions resulting from the marine compartment in Northern France whether from natural or human-made sources. Therefore, a one-year PM10 sampling campaign was conducted at a coastal French site. Results showed that sea-salts contributed 37 %, while secondary nitrate and sulfate contributed 41 %, biomass burning 10 %, and HFO combustion from shipping emissions 5 %. Sources contributing to more than 80 % of PM10 are of regional and/or long-range origins.