Detection of ship plumes from residual fuel operation in emission control areas using single-particle mass spectrometry
Open Access
- 7 June 2021
- journal article
- research article
- Published by Copernicus GmbH in Atmospheric Chemistry and Physics
- Vol. 14 (6), 4171-4185
- https://doi.org/10.5194/amt-14-4171-2021
Abstract
Ships are among the main contributors to global air pollution, with substantial impacts on climate and public health. To improve air quality in densely populated coastal areas and to protect sensitive ecosystems, sulfur emission control areas (SECAs) were established in many regions of the world. Ships in SECAs operate with low-sulfur fuels, typically distillate fractions such as marine gas oil (MGO). Alternatively, exhaust gas-cleaning devices (“scrubbers”) can be implemented to remove SO2 from the exhaust, thus allowing the use of cheap high-sulfur residual fuels. Compliance monitoring is established in harbors but is difficult in open water because of high costs and technical limitations. Here we present the first experiments to detect individual ship plumes from distances of several kilometers by single-particle mass spectrometry (SPMS). In contrast to most monitoring approaches that evaluate the gaseous emissions, such as manned or unmanned surveillance flights, sniffer technologies and remote sensing, we analyze the metal content of individual particles which is conserved during atmospheric transport. We optimized SPMS technology for the evaluation of residual fuel emissions and demonstrate their detection in a SECA. Our experiments show that ships with installed scrubbers can emit PM emissions with health-relevant metals in quantities high enough to be detected from more than 10 km distance, emphasizing the importance of novel exhaust-cleaning technologies and cleaner fuels. Because of the unique and stable signatures, the method is not affected by urban background. With this study, we establish a route towards a novel monitoring protocol for ship emissions. Therefore, we present and discuss mass spectral signatures that indicate the particle age and thus the distance to the source. By matching ship transponder data, measured wind data and air mass back trajectories, we show how real-time SPMS data can be evaluated to assign distant ship passages.Keywords
Funding Information
- Deutsche Forschungsgemeinschaft (ZI 764/6-1)
- Bundesministerium für Wirtschaft und Energie (ZF4402101 ZG7)
- Helmholtz-Gemeinschaft (International Lab Aerohealth, Virtual Institute of Complex Molecular Systems in Environmental Health (HICE))
This publication has 83 references indexed in Scilit:
- Parameterizing the vertical downward dispersion of ship exhaust gas in the near fieldAtmospheric Chemistry and Physics, 2021
- Ship plumes in the Baltic Sea Sulfur Emission Control Area: chemical characterization and contribution to coastal aerosol concentrationsAtmospheric Chemistry and Physics, 2020
- Methods for identifying aged ship plumes and estimating contribution to aerosol exposure downwind of shipping lanesAtmospheric Chemistry and Physics, 2019
- Sources and mixing state of summertime background aerosol in the north-western Mediterranean basinAtmospheric Chemistry and Physics, 2017
- Costs and benefits of low-sulphur fuel standard for Baltic Sea shippingJournal of Environmental Management, 2016
- Field test of available methods to measure remotely SOx and NOx emissions from shipsAtmospheric Chemistry and Physics, 2014
- Airborne emission measurements of SO2 , NOx and particles from individual ships using a sniffer techniqueAtmospheric Chemistry and Physics, 2014
- Ship emissions of SO2 and NO2: DOAS measurements from airborne platformsAtmospheric Chemistry and Physics, 2012
- Characterization of the Single Particle Mixing State of Individual Ship Plume Events Measured at the Port of Los AngelesEnvironmental Science & Technology, 2010
- Impact of Emissions from the Los Angeles Port Region on San Diego Air Quality during Regional Transport EventsEnvironmental Science & Technology, 2009