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| Titel |
Potential of future space instruments to detect NO2 from ship emissions over European waters |
| VerfasserIn |
Huan Yu, Michel Van Roozendael, Andreas Richter, Gerard Hesselmans, Isabelle De Smedt, Hein Zelle |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250106171
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| Publikation (Nr.) |
 EGU/EGU2015-5824.pdf |
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| Zusammenfassung |
| The importance of ship emissions for the marine boundary layer has long been recognized.
One of the key species emitted is NOx, the sum of NO and NO2. In recent years, satellite
observations have been used to identify the signature of tropospheric NO2Âfrom shipping
emissions and to investigate their temporal variability and trends. However, current satellite
NO2 data products are limited by signal to noise ratio, spatial and temporal resolution, cloud
and/or aerosol contamination, and the difficulty to separate shipping NO2 from other sources
of emissions, especially over Europe. Improvements on the first three of these points can be
expected from future satellite instruments, in particular the Sentinel-5 Precursor (S-5P) and
the Sentinel-4 (S4) missions that are planned to be launched during the current
decade.
This study aims at quantitatively investigating the capability of future sensors to detect
NO2 from ship emissions over European waters. We focus more particularly on the East
Mediterranean Sea, the Bay of Biscay and the North Sea areas, which are relatively polluted
regions with significant contributions from dense ship traffic. A regional chemical transport
model (CHIMERE) combined with a high-resolution emission inventory is used to generate
NO2 profile data with high spatial (10x10km2) and temporal (hourly) resolution. Based on
these NO2 data sets, pseudo-observations are generated for future sensors, as well as for
OMI as a reference. These pseudo-observations are then compared to existing data
records of OMI, and used to assess the potential of future sensors for identifying
shipping emissions. The results show shipping NO2 is possible to be detected by daily
observations when integrating along ship tracks, even under unfavorable conditions. |
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