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| Titel |
Monitoring shipping emissions in the German Bight using MAX-DOAS measurements |
| VerfasserIn |
André Seyler, Folkard Wittrock, Lisa Kattner, Barbara Mathieu-Üffing, Enno Peters, Andreas Richter, Stefan Schmolke, John P. Burrows |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149708
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| Publikation (Nr.) |
 EGU/EGU2017-14085.pdf |
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| Zusammenfassung |
| Shipping is generally the most energy efficient transportation mode, but, at the same time, it
accounts for four fifths of the worldwide total merchandise trade volume. As a result,
shipping contributes a significant part to the emissions from the transportation sector. The
majority of shipping emissions occurs within 400 km of land, impacting on air pollution in
coastal areas and harbor towns. The North Sea has one of the highest ship densities in the
world and the vast majority of ships heading for the port of Hamburg sail through the German
Bight and into the river Elbe.
A three-year time series of ground-based MAX-DOAS measurements of NO2 and SO2 on
the island Neuwerk in the German Bight has been analyzed for contributions from shipping
emissions. Measurements of individual ship plumes as well as of background pollution are
possible from this location, which is 6-7 kilometers away from the main shipping lane
towards the harbor of Hamburg. More than 2000 individual ship plumes have been identified
in the data and analyzed for the emission ratio of SO2 to NO2, yielding an average ratio of 0.3
for the years 2013/2014. Contributions of ships and land-based sources to air pollution levels
in the German Bight have been estimated, showing that despite the vicinity to the
shipping lane, the contribution of shipping sources to air pollution is only about
40%.
Since January 2015, much lower fuel sulfur content limits of 0.1% (before: 1.0%) apply
in the North and Baltic Sea Emission Control Area (ECA). Comparing MAX-DOAS
measurements from 2015/2016 (new regulation) to 2013/2014 (old regulation), a large
reduction in SO2/NO2 ratios in shipping emissions and a significant reduction (by a factor of
eight) in ambient coastal SO2 levels have been observed.
In addition to that, selected shipping emission measurements from other measurement
sites and campaigns are presented.
This study is part of the project MeSMarT (Measurements of Shipping emissions in the
Marine Troposphere), a cooperation between the University of Bremen and the Federal
Maritime and Hydrographic Agency (Bundesamt für Seeschifffahrt und Hydrographie, BSH),
supported by the Helmholtz Zentrum Geesthacht (HZG). |
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