The dynamics of N2O near the groundwater table and the transfer of N2O into the unsaturated zone: A case study from a sandy aquifer in Germany

Deurer, M.; Heide, C. von der; Böttcher, Jürgen; Duijnisveld, Wilhelmus H. M.; Weymann, Daniel; Well, Reinhard

doi:10.1016/j.catena.2007.07.013

Cited by 68 publications

(89 citation statements)

References 43 publications

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“…Recharge can increase groundwater DO, DOC and NO 3 --N resulting in increased N 2 O-N production and could decrease further N 2 O-N reduction (Davidson, et al, 1993). Deurer et al (2008) …”

Section: Indirect N 2 O-n Emissionsmentioning

confidence: 99%

Denitrification and indirect N2O emissions in groundwater: Hydrologic and biogeochemical influences

Jahangir

Johnston

Barrett

et al. 2013

Journal of Contaminant Hydrology

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Identification of specific landscape areas with high and low groundwater denitrification potential is critical for improved management of agricultural nitrogen (N) export to ground and surface waters and indirect nitrous oxide (N 2 O) emissions. Denitrification products together with concurrent hydrogeochemical properties were analysed over two years at three depths at two low (L) and two high (H) permeability agricultural sites in Ireland. Mean N 2 O-N at H sites were significantly higher than L sites, and decreased with depth. Conversely, excess N 2 -N were significantly higher at L sites than H sites and did not vary with depth. Denitrifier functional genes were similar at all sites and depths. Data showed that highly favourable conditions prevailed for denitrification to occur -multiple electron donors, low redox potential (Eh <100 mV), low DO (<2 mg L -1 ), low permeability (k s <0.005 m d -1 ) and a shallow unsaturated zone (<2 m). Quantification of excess N 2 -N in groundwater helps to close N balances at the local, regional and global scales.

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“…Recharge can increase groundwater DO, DOC and NO 3 --N resulting in increased N 2 O-N production and could decrease further N 2 O-N reduction (Davidson, et al, 1993). Deurer et al (2008) …”

Section: Indirect N 2 O-n Emissionsmentioning

confidence: 99%

Denitrification and indirect N2O emissions in groundwater: Hydrologic and biogeochemical influences

Jahangir

Johnston

Barrett

et al. 2013

Journal of Contaminant Hydrology

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“…The trace gas nitrous oxide (N 2 O) is known to contribute to global warming (Mosier et al 1998) and catalyses the destruction of stratospheric ozone (Crutzen 1981). Its global atmospheric concentration has increased since pre-industrial times by about 18% (Intergovernmental Panel on Climate Change 2007) and continues to do so.…”

Section: Introductionmentioning

confidence: 99%

Recovery of groundwater N2O at the soil surface and its contribution to total N2O emissions

Weymann

Well

Heide

et al. 2009

Nutr Cycl Agroecosyst

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Production and accumulation of the major greenhouse gas nitrous oxide (N 2 O) in surface groundwater might contribute to N 2 O emissions to the atmosphere. We report on a 15 N tracer study conducted in the Fuhrberger Feld aquifer in northern Germany. A K 15 NO 3 tracer solution (60 atom%) was applied to the surface groundwater on an 8 m 2 measuring plot using 45 injection points in order to stimulate production of 15 N 2 O by denitrification and to detect its contribution to emissions at the soil surface. Samples from the surface groundwater, from the unsaturated zone and at the soil surface were collected in regular intervals over a 72-days period. Total N 2 O fluxes at the soil surface were low and in a range between -7.6 and 29. , indicating that indirect N 2 O emissions from the surface groundwater of the Fuhrberger Feld aquifer occurring via upward diffusion are hardly significant. Due to these observations we concluded that N 2 O dynamics at the soilatmosphere interface is predominantly governed by topsoil parameters. However, highest 15 N enrichments of N 2 O throughout the profile were obtained in the course of a rapid drawdown of the groundwater table.We assume that such fluctuations may enhance diffusive N 2 O fluxes from the surface groundwater to the atmosphere for a short time.

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“…The importance of upward diffusion in transporting groundwater N 2 O to the atmosphere remains uncertain. Several studies showed negligible contribution Weymann et al 2009) while others (Deurer et al 2008;Bö ttcher et al 2011) showed evidence of significant vertical diffusion of N 2 O into the unsaturated zone. Extensive studies have been conducted on diffusive N 2 O release but emission of groundwaterderived N 2 O through SGD has seldom been studied.…”

mentioning

confidence: 99%

Dynamics of groundwater‐derived nitrate and nitrous oxide in a tidal estuary from radon mass balance modeling

Wong

Grace

Cartwright

et al. 2013

Limnology & Oceanography

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The dynamics of N2O near the groundwater table and the transfer of N2O into the unsaturated zone: A case study from a sandy aquifer in Germany

Cited by 68 publications

References 43 publications

Denitrification and indirect N2O emissions in groundwater: Hydrologic and biogeochemical influences

Denitrification and indirect N2O emissions in groundwater: Hydrologic and biogeochemical influences

Recovery of groundwater N2O at the soil surface and its contribution to total N2O emissions

Dynamics of groundwater‐derived nitrate and nitrous oxide in a tidal estuary from radon mass balance modeling

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