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Title:
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Biogenic and reduced atmospheric sulphur compounds in theNetherlands
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Author(s):
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Published by:
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Publication date:
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ECN
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1995
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ECN report number:
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Document type:
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ECN-C--95-014
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ECN publication
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Number of pages:
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Full text:
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35
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Download PDF
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Abstract:
Organo sulphur compounds were measured at a site close to the North Seain the Netherlands during the summer of 1992 and 1993. The concentration of
dimethyl sulfide (DMS) and DMS reaction products in the air is less than 200
ngS/m3, but sometimes higher concentrations were found. Only small amounts
of DMS are formed in the Wadden Sea, leading to extra concentrations up to 30
ngS/m3. Most of the DMS observed in the Netherlands probably originates from
the northern part of the North Sea. The concentration of H2S is about 200
ngS/m3 with a range from 20 to 1600 ngS/m3. It is not clear whether all
H2S is of a biogenic origin. The H2S concentration has to be added to the
oxidized S-balance because of its fast oxidation rate. The contribution of
SO2 and sulphates formed from DMS, DMS reaction products and H2S to the
deposition of oxidized sulphur in the Netherlands is between 2 and 4%; only a
part of the H2S is expected to be of anthropogenic origin. The error in the
measurements and the deposition estimates is still considerable. COS and CS2
have been observed in high concentrations (754 respectively 384 ngS/m3), but
the contribution of these compounds to the S-deposition in the Netherlands
(via conversion to SO2 or SO4) can be neglected, because of the long
atmospheric lifetime caused by a negligible deposition velocity and a slow
oxidation to SO2. 8 figs., 3 tabs., 1 appendix, 22 refs.
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