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Nitrous oxide emissions to the atmosphere from an artificially oxygenated lake
Author(s) -
Mengis Martin,
Gächter René,
Wehrli Bernhard
Publication year - 1996
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1996.41.3.0548
Subject(s) - hypolimnion , nitrous oxide , atmosphere (unit) , eutrophication , environmental science , environmental chemistry , stratification (seeds) , aeration , sediment , benthic zone , epilimnion , hydrology (agriculture) , oceanography , chemistry , geology , nutrient , meteorology , seed dormancy , physics , germination , botany , organic chemistry , geotechnical engineering , dormancy , biology , paleontology
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. N 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 2 O emission to the atmosphere (24 µ mol m −2 d −1 ) were observed after the onset of winter overturn, when hypolimnetic water enriched in N 2 O came in contact with the atmosphere. During summer stratification N 2 O emissions to the atmosphere decreased to ∼4 µ mol m −2 d −1 . The winter fluxes are close to the highest reported N 2 O emissions from marine systems.