Title: Quantifying the impact of anthropogenic nitrogen deposition on oceanic nitrous oxide
Authors: SUNTHARALINGAM ParvadhaBUITENHUIS ErikLE QUERE CorinneDENTENER FranciscusNEVISON CynthiaBUTLER JamesBANGE HermannFORSTER Grant
Citation: GEOPHYSICAL RESEARCH LETTERS vol. 39 no. L07605 p. 1-6
Publisher: AMER GEOPHYSICAL UNION
Publication Year: 2012
JRC N°: JRC66386
ISSN: 0094-8276
URI: http://www.agu.org/pubs/crossref/2012/2011GL050778.shtml
http://publications.jrc.ec.europa.eu/repository/handle/JRC66386
DOI: 10.1029/2011GL050778
Type: Articles in Journals
Abstract: Anthropogenically induced increases in nitrogen deposition to the ocean can stimulate marine productivity and oceanic emission of nitrous oxide. We present the first global ocean model 12 assessment of the impact on marine N2O of increases in nitrogen deposition from the pre-industrial era to the present. We find significant regional increases in marine N2O production downwind of continental outflow, in coastal and inland seas (15-30%), and nitrogen limited regions of the North Atlantic and North Pacific (5-20%). The largest changes occur in the northern Indian Ocean (up to 16 50%) resulting from a combination of high deposition fluxes and enhanced N2O production 1pathways in local hypoxic zones. Oceanic regions relatively unaffected by anthropogenic nitrogen 18 deposition indicate much smaller changes (< 2%). The estimated change in oceanic N2O source on a global scale is modest (0.08 – 0.34 Tg N yr-1, ~3-4% of the total ocean source), and consistent 20 with the estimated impact on global export production (~4%).
JRC Institute:Institute for Environment and Sustainability

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