Details

Autor(en) / Beteiligte

• Mengis, Martin
• Gachter, Rene
• Wehrli, Bernhard

Titel

Nitrous Oxide Emissions to the Atmosphere from an Artificially Oxygenated Lake

Ist Teil von

• Limnology and oceanography, 1996-05, Vol.41 (3), p.548-553

Ort / Verlag

Waco, TX: American Society of Limnology and Oceanography

Erscheinungsjahr

1996

Link zum Volltext

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Nitrous oxide (N-2 O) production at the sediment surface of eutrophic Lake Baldegg was quantified with three independent methods: pore-water samplers, benthic chambers, and mass balances of the aerated-oxygenated hypolimnion. N2Oproduction at the sediment surface was the most important source in this lake and led to an accumulation in the hypolimnion during summer stratification. Highest rates of N2Oemission to the atmosphere (24 μ mol m-2 d-1) were observed after the onset of winter overturn, when hypolimnetic water enriched in N2Ocame in contact with the atmosphere. During summer stratification N2Oemissions to the atmosphere decreased to ∼ 4 μ mol m-2 d-1. The winter fluxes are close to the highest reported N2Oemissions from marine systems.