Details
| Original language | English |
|---|---|
| Pages (from-to) | 2161-2171 |
| Number of pages | 11 |
| Journal | Journal of environmental quality |
| Volume | 38 |
| Issue number | 6 |
| Publication status | Published - 1 Nov 2009 |
Abstract
Ground water is considered to be an important source for indirect N 2O emissions. We investigated indirect N2O emissions from a shallow aquifer in Germany over a 1-yr period. Because N2O accumulated in considerable amounts in the surface ground water (mean, 52.86 μg N2O-N L-1) and corresponding fluxes were high (up to 34 μg N2O-N m-2 h-1), it was hypothesized that significant indirect N2O emissions would occur via the vertical and the lateral emission pathway. Vertical N2O emissions were investigated by measuring N2O concentrations and calculating fluxes from the surface ground water to the unsaturated zone and at the soil surface. Lateral N2O fluxes were investigated by measuring ground water N 2O and NO3 - concentrations at five multilevel wells and at a waterworks well. Negligible amounts of N2O were emitted vertically into the unsaturated zone; most of it was convectively transported into the deeper autotrophic denitrification zone. Only a ground water level fall and rise triggered the emission of N2O (up to 3 μg N2O-N m-2 h-1) into the unsaturated zone. Ground water-derived N2O was probably reduced during the upward diffusion, and soil surface emissions were governed by topsoil processes. Along the lateral pathway, N2O and NO3 - concentrations decreased with increasing depth in the aquifer. Discharging ground water was almost free of N2O and NO3 -, and indirect N2O emissions were small.
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Engineering
- Environmental Science(all)
- Water Science and Technology
- Environmental Science(all)
- Waste Management and Disposal
- Environmental Science(all)
- Pollution
- Environmental Science(all)
- Management, Monitoring, Policy and Law
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In: Journal of environmental quality, Vol. 38, No. 6, 01.11.2009, p. 2161-2171.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Estimation of indirect nitrous oxide emissions from a shallow aquifer in northern Germany
AU - Von Der Heide, Carolin
AU - Böttcher, Jürgen
AU - Deurer, Markus
AU - Duijnisveld, Wilhelmus H.M.
AU - Weymann, Daniel
AU - Well, Reinhard
PY - 2009/11/1
Y1 - 2009/11/1
N2 - Ground water is considered to be an important source for indirect N 2O emissions. We investigated indirect N2O emissions from a shallow aquifer in Germany over a 1-yr period. Because N2O accumulated in considerable amounts in the surface ground water (mean, 52.86 μg N2O-N L-1) and corresponding fluxes were high (up to 34 μg N2O-N m-2 h-1), it was hypothesized that significant indirect N2O emissions would occur via the vertical and the lateral emission pathway. Vertical N2O emissions were investigated by measuring N2O concentrations and calculating fluxes from the surface ground water to the unsaturated zone and at the soil surface. Lateral N2O fluxes were investigated by measuring ground water N 2O and NO3 - concentrations at five multilevel wells and at a waterworks well. Negligible amounts of N2O were emitted vertically into the unsaturated zone; most of it was convectively transported into the deeper autotrophic denitrification zone. Only a ground water level fall and rise triggered the emission of N2O (up to 3 μg N2O-N m-2 h-1) into the unsaturated zone. Ground water-derived N2O was probably reduced during the upward diffusion, and soil surface emissions were governed by topsoil processes. Along the lateral pathway, N2O and NO3 - concentrations decreased with increasing depth in the aquifer. Discharging ground water was almost free of N2O and NO3 -, and indirect N2O emissions were small.
AB - Ground water is considered to be an important source for indirect N 2O emissions. We investigated indirect N2O emissions from a shallow aquifer in Germany over a 1-yr period. Because N2O accumulated in considerable amounts in the surface ground water (mean, 52.86 μg N2O-N L-1) and corresponding fluxes were high (up to 34 μg N2O-N m-2 h-1), it was hypothesized that significant indirect N2O emissions would occur via the vertical and the lateral emission pathway. Vertical N2O emissions were investigated by measuring N2O concentrations and calculating fluxes from the surface ground water to the unsaturated zone and at the soil surface. Lateral N2O fluxes were investigated by measuring ground water N 2O and NO3 - concentrations at five multilevel wells and at a waterworks well. Negligible amounts of N2O were emitted vertically into the unsaturated zone; most of it was convectively transported into the deeper autotrophic denitrification zone. Only a ground water level fall and rise triggered the emission of N2O (up to 3 μg N2O-N m-2 h-1) into the unsaturated zone. Ground water-derived N2O was probably reduced during the upward diffusion, and soil surface emissions were governed by topsoil processes. Along the lateral pathway, N2O and NO3 - concentrations decreased with increasing depth in the aquifer. Discharging ground water was almost free of N2O and NO3 -, and indirect N2O emissions were small.
UR - http://www.scopus.com/inward/record.url?scp=70350741531&partnerID=8YFLogxK
U2 - 10.2134/jeq2008.0320
DO - 10.2134/jeq2008.0320
M3 - Article
C2 - 19875771
AN - SCOPUS:70350741531
VL - 38
SP - 2161
EP - 2171
JO - Journal of environmental quality
JF - Journal of environmental quality
SN - 0047-2425
IS - 6
ER -