Details
| Original language | English |
|---|---|
| Pages (from-to) | 759-764 |
| Number of pages | 6 |
| Journal | Soil Science Society of America Journal |
| Volume | 77 |
| Issue number | 3 |
| Publication status | Published - May 2013 |
Abstract
For the calculation of gas fluxes through soils, the soil gas diffusion coefficient Ds needs to be known. Ds can be derived from diffusion chamber experiments or from field experiments measuring diffusive gas fluxes across larger spatial scales. Within these methods, the gas concentration depletion or enrichment in an accumulation chamber is used to derive D s based on Fick's law. However, since this approach does not account for retardation of soluble gases in the soil water phase, the applicability is restricted to rather inert gases. The method also does not account for convective fluxes due to sampling. To overcome these limitations and to enable the applicability of an earlier presented two-side in situ method, Ds needs to be estimated inversely from the transient diffusion experiments. In this paper, a convenient computer tool is presented that allows the estimation of Ds from diffusion chamber experiments and two in situ methods.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Soil Science Society of America Journal, Vol. 77, No. 3, 05.2013, p. 759-764.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A simple tool for the inverse estimation of soil gas diffusion coefficients
AU - Schwen, Andreas
AU - Böttcher, Jürgen
N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.
PY - 2013/5
Y1 - 2013/5
N2 - For the calculation of gas fluxes through soils, the soil gas diffusion coefficient Ds needs to be known. Ds can be derived from diffusion chamber experiments or from field experiments measuring diffusive gas fluxes across larger spatial scales. Within these methods, the gas concentration depletion or enrichment in an accumulation chamber is used to derive D s based on Fick's law. However, since this approach does not account for retardation of soluble gases in the soil water phase, the applicability is restricted to rather inert gases. The method also does not account for convective fluxes due to sampling. To overcome these limitations and to enable the applicability of an earlier presented two-side in situ method, Ds needs to be estimated inversely from the transient diffusion experiments. In this paper, a convenient computer tool is presented that allows the estimation of Ds from diffusion chamber experiments and two in situ methods.
AB - For the calculation of gas fluxes through soils, the soil gas diffusion coefficient Ds needs to be known. Ds can be derived from diffusion chamber experiments or from field experiments measuring diffusive gas fluxes across larger spatial scales. Within these methods, the gas concentration depletion or enrichment in an accumulation chamber is used to derive D s based on Fick's law. However, since this approach does not account for retardation of soluble gases in the soil water phase, the applicability is restricted to rather inert gases. The method also does not account for convective fluxes due to sampling. To overcome these limitations and to enable the applicability of an earlier presented two-side in situ method, Ds needs to be estimated inversely from the transient diffusion experiments. In this paper, a convenient computer tool is presented that allows the estimation of Ds from diffusion chamber experiments and two in situ methods.
UR - http://www.scopus.com/inward/record.url?scp=84880165499&partnerID=8YFLogxK
U2 - 10.2136/sssaj2012.0347n
DO - 10.2136/sssaj2012.0347n
M3 - Article
AN - SCOPUS:84880165499
VL - 77
SP - 759
EP - 764
JO - Soil Science Society of America Journal
JF - Soil Science Society of America Journal
SN - 0361-5995
IS - 3
ER -