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dc.contributor.author
Martinez-Rey, J.
dc.contributor.author
Bopp, Laurent
dc.contributor.author
Gehlen, Marion
dc.contributor.author
Tagliabue, Alessandro
dc.contributor.author
Gruber, Nicolas
dc.date.accessioned
2022-06-21T11:21:51Z
dc.date.available
2018-10-05T07:07:53Z
dc.date.available
2018-10-05T07:11:08Z
dc.date.available
2022-06-21T11:21:51Z
dc.date.issued
2014-12-04
dc.identifier.issn
1810-6277
dc.identifier.issn
1810-6285
dc.identifier.other
10.5194/bgd-11-16703-2014
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/293692
dc.identifier.doi
10.3929/ethz-b-000293692
dc.description.abstract
The ocean is a substantial source of nitrous oxide (N2O) to the atmosphere, but little is known on how this flux might change in the future. Here, we investigate the potential evolution of marine N2O emissions in the 21st century in response to anthropogenic climate change using the global ocean biogeochemical model NEMO-PISCES. We implemented two different parameterizations of N2O production, which differ primarily at low oxygen (O2) conditions. When forced with output from a climate model simulation run under the business-as-usual high CO2 concentration scenario (RCP8.5), our simulations suggest a decrease of 4 to 12 % in N2O emissions from 2005 to 2100, i.e., a reduction from 4.03/3.71 to 3.54/3.56 Tg N yr−1 depending on the parameterization. The emissions decrease strongly in the western basins of the Pacific and Atlantic oceans, while they tend to increase above the Oxygen Minimum Zones (OMZs), i.e., in the Eastern Tropical Pacific and in the northern Indian Ocean. The reduction in N2O emissions is caused on the one hand by weakened nitrification as a consequence of reduced primary and export production, and on the other hand by stronger vertical stratification, which reduces the transport of N2O from the ocean interior to the ocean surface. The higher emissions over the OMZ are linked to an expansion of these zones under global warming, which leads to increased N2O production associated primarily with denitrification. From the perspective of a global climate system, the averaged feedback strength associated with the projected decrease in oceanic N2O emissions amounts to around -0.009 W m−2K−1, which is comparable to the potential increase from terrestrial N2O sources. However, the assesment for a compensation between the terrestrial and marine feedbacks calls for an improved representation of N2O production terms in fully coupled next generation of Earth System Models.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Copernicus
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Oceanic N2O emissions in the 21st century
en_US
dc.type
Working Paper
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
Biogeosciences Discussions
ethz.journal.volume
11
en_US
ethz.journal.abbreviated
Biogeosci. discuss.
ethz.pages.start
16703
en_US
ethz.pages.end
16742
en_US
ethz.publication.place
Göttingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02721 - Inst. f. Biogeochemie u. Schadstoffdyn. / Inst. Biogeochem. and Pollutant Dynamics::03731 - Gruber, Nicolas / Gruber, Nicolas
ethz.relation.isPreviousVersionOf
10.3929/ethz-b-000103082
ethz.date.deposited
2017-06-11T15:09:47Z
ethz.source
ECIT
ethz.identifier.importid
imp593654141e13041255
ethz.identifier.importid
imp593652c24aedd34670
ethz.ecitpid
pub:173964
ethz.ecitpid
pub:149928
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-10-05T07:08:44Z
ethz.rosetta.lastUpdated
2018-10-05T07:11:49Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/164468
dc.identifier.olduri
http://hdl.handle.net/20.500.11850/95581
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Oceanic%20N2O%20emissions%20in%20the%2021st%20century&rft.jtitle=Biogeosciences%20Discussions&rft.date=2014-12-04&rft.volume=11&rft.spage=16703&rft.epage=16742&rft.issn=1810-6277&1810-6285&rft.au=Martinez-Rey,%20J.&Bopp,%20Laurent&Gehlen,%20Marion&Tagliabue,%20Alessandro&Gruber,%20Nicolas&rft.genre=preprint&rft_id=info:doi/10.5194/bgd-11-16703-2014&
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