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| Titel |
Soil atmosphere exchange of carbonyl sulfide (COS) regulated by diffusivity depending on water-filled pore space |
| VerfasserIn |
H. Diest, J. Kesselmeier |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 5, no. 2 ; Nr. 5, no. 2 (2008-04-01), S.475-483 |
| Datensatznummer |
250002379
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| Publikation (Nr.) |
 copernicus.org/bg-5-475-2008.pdf |
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| Zusammenfassung |
| The exchange of carbonyl sulfide (COS) between soil and the atmosphere was
investigated for three arable soils from Germany, China and Finland and one
forest soil from Siberia for parameterization in the relation to ambient
carbonyl sulfide (COS) concentration, soil water content (WC) and air
temperature. All investigated soils acted as sinks for COS. A clear and
distinct uptake optimum was found for the German, Chinese, Finnish and
Siberian soils at 11.5%, 9%, 11.5%, and 9% soil WC,
respectively, indicating that the soil WC acts as an important biological
and physical parameter for characterizing the exchange of COS between soils
and the atmosphere. Different optima of deposition velocities (Vd) as
observed for the Chinese, Finnish and Siberian boreal soil types in relation
to their soil WC, aligned at 19% in relation to the water-filled pore
space (WFPS), indicating the dominating role of gas diffusion. This
interpretation was supported by the linear correlation between Vd and
bulk density. We suggest that the uptake of COS depends on the diffusivity
dominated by WFPS, a parameter depending on soil WC, soil structure and
porosity of the soil. |
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