North Atlantic production of nitrous oxide in the context of changing atmospheric levels
We use transit time distributions calculated from tracer data together with in situ measurements of N(2)O to estimate the concentration of biologically produced N(2)O ([N(2)O](xs)) and N(2)O production rates in the central North Atlantic Ocean. Our approach to estimation of N(2)O production rates in...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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AGU (American Geophysical Union)
2009
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Online Access: | https://oceanrep.geomar.de/id/eprint/6436/ https://oceanrep.geomar.de/id/eprint/6436/1/2009GB003472.pdf https://doi.org/10.1029/2009GB003472 |
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ftoceanrep:oai:oceanrep.geomar.de:6436 2023-05-15T17:29:29+02:00 North Atlantic production of nitrous oxide in the context of changing atmospheric levels Freing, Alina Wallace, Douglas W.R. Tanhua, Toste Walter, Sylvia Bange, Hermann W. 2009 text https://oceanrep.geomar.de/id/eprint/6436/ https://oceanrep.geomar.de/id/eprint/6436/1/2009GB003472.pdf https://doi.org/10.1029/2009GB003472 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/6436/1/2009GB003472.pdf Freing, A., Wallace, D. W. R., Tanhua, T. , Walter, S. and Bange, H. W. (2009) North Atlantic production of nitrous oxide in the context of changing atmospheric levels. Open Access Global Biogeochemical Cycles, 23 . GB4015. DOI 10.1029/2009GB003472 <https://doi.org/10.1029/2009GB003472>. doi:10.1029/2009GB003472 info:eu-repo/semantics/openAccess Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1029/2009GB003472 2023-04-07T14:53:01Z We use transit time distributions calculated from tracer data together with in situ measurements of N(2)O to estimate the concentration of biologically produced N(2)O ([N(2)O](xs)) and N(2)O production rates in the central North Atlantic Ocean. Our approach to estimation of N(2)O production rates integrates the effects of potentially varying production and decomposition mechanisms along the transport path of a water mass. We find that previously used approaches overestimate the oceanic equilibrium N(2)O concentrations by 8-13% and thus underestimate the strength of N(2)O sources in large parts of the water column. Thus the quantitative characteristics of the [N(2)O](xs)/AOU relationship used as an indicator of nitrification are distorted. We developed a new parameterization of N(2)O production during nitrification depending linearly on AOU and exponentially on temperature and depth, which can be applied to calculate N(2)O production due to nitrification in the entire ocean including oxygen minimum zones. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Global Biogeochemical Cycles 23 4 n/a n/a |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
We use transit time distributions calculated from tracer data together with in situ measurements of N(2)O to estimate the concentration of biologically produced N(2)O ([N(2)O](xs)) and N(2)O production rates in the central North Atlantic Ocean. Our approach to estimation of N(2)O production rates integrates the effects of potentially varying production and decomposition mechanisms along the transport path of a water mass. We find that previously used approaches overestimate the oceanic equilibrium N(2)O concentrations by 8-13% and thus underestimate the strength of N(2)O sources in large parts of the water column. Thus the quantitative characteristics of the [N(2)O](xs)/AOU relationship used as an indicator of nitrification are distorted. We developed a new parameterization of N(2)O production during nitrification depending linearly on AOU and exponentially on temperature and depth, which can be applied to calculate N(2)O production due to nitrification in the entire ocean including oxygen minimum zones. |
format |
Article in Journal/Newspaper |
author |
Freing, Alina Wallace, Douglas W.R. Tanhua, Toste Walter, Sylvia Bange, Hermann W. |
spellingShingle |
Freing, Alina Wallace, Douglas W.R. Tanhua, Toste Walter, Sylvia Bange, Hermann W. North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
author_facet |
Freing, Alina Wallace, Douglas W.R. Tanhua, Toste Walter, Sylvia Bange, Hermann W. |
author_sort |
Freing, Alina |
title |
North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
title_short |
North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
title_full |
North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
title_fullStr |
North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
title_full_unstemmed |
North Atlantic production of nitrous oxide in the context of changing atmospheric levels |
title_sort |
north atlantic production of nitrous oxide in the context of changing atmospheric levels |
publisher |
AGU (American Geophysical Union) |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/6436/ https://oceanrep.geomar.de/id/eprint/6436/1/2009GB003472.pdf https://doi.org/10.1029/2009GB003472 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/6436/1/2009GB003472.pdf Freing, A., Wallace, D. W. R., Tanhua, T. , Walter, S. and Bange, H. W. (2009) North Atlantic production of nitrous oxide in the context of changing atmospheric levels. Open Access Global Biogeochemical Cycles, 23 . GB4015. DOI 10.1029/2009GB003472 <https://doi.org/10.1029/2009GB003472>. doi:10.1029/2009GB003472 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2009GB003472 |
container_title |
Global Biogeochemical Cycles |
container_volume |
23 |
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4 |
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n/a |
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_version_ |
1766123610066386944 |