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| Titel |
Halocarbon distributions and emissions in the western tropical Pacific during the SHIVA SONNE expedition in November 2011 |
| VerfasserIn |
B. Quack, E. Atlas, Q. Shi, H. Hepach, S. Raimund, J. Kinzel, E. Leedham, S. Fuhlbrügge, S. Wiegmann, W. Chea, F. Wittke, A. Robinson, N. Harris, K. Kreher, B. Sturges, A. Bracher, D. Wallace, K. Krüger |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250069588
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| Zusammenfassung |
| Marine brominated and iodinated halocarbons participate in catalytic ozone destruction and
aerosol formation in the troposphere and they also have a significant impact on stratospheric
ozone. While the tropical oceans are a known source of these very short lived substances
(VSLS), including e.g. bromoform (CHBr3) and methyliodide (CH3I), the tropical Western
Pacific waters are largely uncharacterized for these compounds. Coastal macro algae,
regionally enhanced phytoplankton abundance, photochemical reactions and local
anthropogenic sources are expected to contribute to strong marine emissions. As
high convective activity with fast efficient uplift takes place throughout the year,
the western Pacific is projected to be a hot spot for oceanic VSLS supply to the
stratosphere.
In this study, we present first results from the SHIVA Sonne expedition to the South
China Sea during November 2011. The research cruise was embedded within the
framework of the EU-project SHIVA (Stratospheric ozone: Halogen Impacts in a
Varying Atmosphere). During the cruise we investigated the large variability of
the VSLS concentrations in both ocean and atmosphere using several methods,
including in-situ atmospheric measurements, air canister sampling, purge and trap gas
chromatography with electron capture and mass spectrometric detection. We will
intercompare the results from various methods and present highlights from the expedition
including atmospheric and oceanic VSLS data, as well as first estimates of emissions. |
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