DOI: 10.57932/90ffebbe-94c3-4356-a073-78ec9e014b1d
title: Time series of high temporal resolution observations of atmospheric pollutants in a Mediterranean port in June 2021.

description: In June 2021, a comprehensive measurement campaign was conducted in the Mediterranean port of Marseille (France). The main objective of this campaign was to enhance knowledges about pollutant emissions from shipping.
High-temporal-resolution data were simultaneously collected from two monitoring sites implemented in the port vicinity to provide the chemical composition of ship emissions in both the gas and the particulate phases. The sites were selected to capture ship emissions specifically while minimizing influence from other sources.
The first station, labelled PEB, was located on a seawall, 150 m from the northern access seaway to the port, less than 700 m south-east of the cruise terminals, 1 200 m south of the container terminal and about 800 m north-west of ferry berths (43°20'6.89” N; 5°20'21.76” E; 5 msl). The second station, labelled MAJOR, was located along the “Joliette” berth, 250 m from the access lane to the port via the southern pass, less than 200 m to the north-east of the luxury cruise terminal and around 250 m south-east of ferry berths (43°18'0.51” N; 5°21'48.01” E; 5 msl).
The collected dataset includes high-temporal-resolution measurements from a wide range of analytical instruments deployed at both monitoring sites. The chemical composition of submicronic aerosols was characterized, focusing on non-refractory species such as sulphates, nitrates, ammonium, chlorides, and organic matter using a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). Additionally, metal composition was determined using an energy-dispersive X-ray fluorescence (EDXRF) spectrometer. Black carbon (BC) concentrations were measured with a multi-angle absorption photometer and an aethalometer. Particle number concentrations were recorded using condensation particle counters (CPC). The aerosol number size distribution was further explored (i) in the range 15-660 nm using Scanning Mobility Particle Sizers (SMPS) and (ii) in the range 250 nm to 3.2 µm using an optical particulate counter (OPC). The particle mass concentrations (PM1, PM2.5, PM10) were obtained from measurements taken by the OPC. The database also includes volatile organic compound (VOC) measurements, monitored using a proton-transfer-reaction mass spectrometer (PTR-ToF-MS) and a pair of TD-GC-FIDs (Thermal Desorber-Gas Chromatography-Flame Ionization Detector). The first instrument, a Perkin Elmer TD-GC-FID measurement chain, featured dual chromatographic columns and dual FID detections for hourly measurement of 60 non-methane hydrocarbon species (NMHC) containing 2 to 12 carbon atoms. The second instrument, an AirmoVPC C6-C16 (Chromatotec), was specifically configured with adapted adsorbent and chromatographic column for the hourly measurement of 40 NMHC containing 6 to 16 carbon atoms. Gas-phase species such as carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), and ammonia (NH3), were measured using cavity ring-down spectroscopy. Regulatory pollutants, including nitrogen oxides (NOx), sulphur dioxide (SO2), and ozone (O3), were monitored with standard high temporal resolution instruments.
The repository contains:
• Instruments_overview.pdf: provides an overview of the instruments deployed during the field campaign, including specifications such as detection limits, uncertainties, and quality control procedures.
• 6 datasets named PAREA_X: provides the time series of air pollutant concentrations measured at both stations. "PAREA" refers to the project name, and the variable name "X" indicates the averaging time for the dataset.
• README.txt : provides information about the columns in the datasets.