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Application of static and dynamic enclosures in determining DMS and OCS fluxes in Sphagnum peatlandsA static enclosure method was applied to determine the exchange of dimethyl sulfide (DMS) and OCS between the surface of Sphagnum peatlands and the atmosphere. Measurements were performed concurrently with dynamic enclosure measurements with S-free air used as sweep gas. DMS emission rates determined by both methods were comparable between 5 and 500 nmol/m(sup -2)h(sup -1). The dynamic method provided positive OCS flux rates (emission) for measurements performed at sites containing Sphagnum. Conversely, data from the static method indicated that OCS was consumed from the atmosphere. Measurements using both techniques at a site devoid of vegetation showed that peat is a source of both DMS and OCS. Results suggested that OCS is produced in surface peat but it is taken up from the atmosphere by Sphagnum mosses. However, the net effect of both processes is that OCS uptake exceeds emission. The dynamic enclosure technique is adequate to measure rates of emissions of S gases which are produced in peatlands but not consumed, as long as attention is paid to the rate of sweep flow.
Document ID
19940007988
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Demello, William Zamboni
(New Hampshire Univ. Durham, NH, United States)
Hines, Mark E.
(New Hampshire Univ. Durham, NH, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Terminal Decomposition and Gaseous Sulfur Release from Tidal Wetlands
Subject Category
Environment Pollution
Accession Number
94N12460
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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