Nitrous oxide emissions to the atmosphere from an artificially oxygenated lake

Journal Article · Wed May 01 04:00:00 EDT 1996 · Limnology and Oceanography

DOI:https://doi.org/10.4319/lo.1996.41.3.0548· OSTI ID:447715

Mengis, M; Gaechter, R; Wehrli, B ^[1]

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1. Limnological Research Center, Kastanienbaum (Sweden)

Nitrous oxide (N{sub 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. N{sub 2}O production 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 N{sub 2}O emission to the atmosphere (24 {mu}mol m{sup {minus}2} d{sup {minus}1}) were observed after the onset of winter overturn, when hypolimnetic water enriched in N{sub 2}O came in contact with the atmosphere. During summer stratification N{sub 2}O emissions to the atmosphere decreased to {approximately}4 {mu}mol m{sup {minus}2} d {sup {minus}1}. The winter fluxes are close to the highest reported N{sub 2}O emissions from marine systems. 23 refs., 4 figs., 2 tabs.

• OSTI ID: 447715
• Journal Information: Limnology and Oceanography, Journal Name: Limnology and Oceanography Journal Issue: 3 Vol. 41; ISSN LIOCAH; ISSN 0024-3590
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CLIMATIC CHANGE
EMISSION
ESTUARIES
NITROUS OXIDE
POLLUTION SOURCES
SEASONAL VARIATIONS
STRATIFICATION
SURFACE WATERS