| Global oceanic production of nitrous oxide. | |
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MedLine Citation:
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PMID: 22451110 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We use transient time distributions calculated from tracer data together with in situ measurements of nitrous oxide (N(2)O) to estimate the concentration of biologically produced N(2)O and N(2)O production rates in the ocean on a global scale. Our approach to estimate the N(2)O production rates integrates the effects of potentially varying production and decomposition mechanisms along the transport path of a water mass. We estimate that the oceanic N(2)O production is dominated by nitrification with a contribution of only approximately 7 per cent by denitrification. This indicates that previously used approaches have overestimated the contribution by denitrification. Shelf areas may account for only a negligible fraction of the global production; however, estuarine sources and coastal upwelling of N(2)O are not taken into account in our study. The largest amount of subsurface N(2)O is produced in the upper 500 m of the water column. The estimated global annual subsurface N(2)O production ranges from 3.1 ± 0.9 to 3.4 ± 0.9 Tg N yr(-1). This is in agreement with estimates of the global N(2)O emissions to the atmosphere and indicates that a N(2)O source in the mixed layer is unlikely. The potential future development of the oceanic N(2)O source in view of the ongoing changes of the ocean environment (deoxygenation, warming, eutrophication and acidification) is discussed. |
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Authors:
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Alina Freing; Douglas W R Wallace; Hermann W Bange |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Philosophical transactions of the Royal Society of London. Series B, Biological sciences Volume: 367 ISSN: 1471-2970 ISO Abbreviation: Philos. Trans. R. Soc. Lond., B, Biol. Sci. Publication Date: 2012 May |
Date Detail:
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Created Date: 2012-03-27 Completed Date: 2012-10-16 Revised Date: 2013-05-20 |
Medline Journal Info:
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Nlm Unique ID: 7503623 Medline TA: Philos Trans R Soc Lond B Biol Sci Country: England |
Other Details:
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Languages: eng Pagination: 1245-55 Citation Subset: IM |
Affiliation:
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GEOMAR/Helmholtz Centre for Ocean Research Kiel, Kiel, Germany. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Nitrification Nitrous Oxide / analysis, metabolism* Oceans and Seas Water Microbiology* |
| Chemical | |
Reg. No./Substance:
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10024-97-2/Nitrous Oxide |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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