Nitrous oxide in the North Atlantic Ocean
International audience In order to get a comprehensive picture of the distribution of nitrous oxide (N 2 O) in the North Atlantic Ocean, measurements of dissolved nitrous oxide were made during three cruises in the tropical, subtropical and cold-temperate North Atlantic Ocean in October/November 200...
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ftinsu:oai:HAL:hal-00297585v1 2023-11-12T04:21:36+01:00 Nitrous oxide in the North Atlantic Ocean Walter, S. Bange, H. W. Breitenbach, U. Wallace, D. W. R. Forschungsbereich Marine Biogeochemie Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) 2006-12-01 https://hal.science/hal-00297585 https://hal.science/hal-00297585/document https://hal.science/hal-00297585/file/bg-3-607-2006.pdf en eng HAL CCSD European Geosciences Union hal-00297585 https://hal.science/hal-00297585 https://hal.science/hal-00297585/document https://hal.science/hal-00297585/file/bg-3-607-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297585 Biogeosciences, 2006, 3 (4), pp.607-619 [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2006 ftinsu 2023-10-25T16:28:36Z International audience In order to get a comprehensive picture of the distribution of nitrous oxide (N 2 O) in the North Atlantic Ocean, measurements of dissolved nitrous oxide were made during three cruises in the tropical, subtropical and cold-temperate North Atlantic Ocean in October/November 2002, March/April 2004, and May 2002, respectively. To account for the history of atmospheric N 2 O, we suggest a new depth-dependent calculation of excess N 2 O (?N 2 O). N 2 O depth profiles showed supersaturation throughout the water column with a distinct increasing trend from the cold-temperate to the tropical region. Lowest nitrous oxide concentrations, near equilibrium and with an average of 11.0±1.7 nmol L ?1 , were found in the cold-temperate North Atlantic where the profiles showed no clear maxima. Highest values up to 37.3 nmol L ?1 occurred in the tropical North Atlantic with clear maxima at approximately 400 m. A positive correlation of nitrous oxide with nitrate, as well as excess nitrous oxide with the apparent oxygen utilization (AOU), was only observed in the subtropical and tropical regions. Therefore, we conclude that the formation of nitrous oxide via nitrification occurs in the tropical region rather than in the cold-temperate region of the North Atlantic Ocean Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Walter, S. Bange, H. W. Breitenbach, U. Wallace, D. W. R. Nitrous oxide in the North Atlantic Ocean |
topic_facet |
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience In order to get a comprehensive picture of the distribution of nitrous oxide (N 2 O) in the North Atlantic Ocean, measurements of dissolved nitrous oxide were made during three cruises in the tropical, subtropical and cold-temperate North Atlantic Ocean in October/November 2002, March/April 2004, and May 2002, respectively. To account for the history of atmospheric N 2 O, we suggest a new depth-dependent calculation of excess N 2 O (?N 2 O). N 2 O depth profiles showed supersaturation throughout the water column with a distinct increasing trend from the cold-temperate to the tropical region. Lowest nitrous oxide concentrations, near equilibrium and with an average of 11.0±1.7 nmol L ?1 , were found in the cold-temperate North Atlantic where the profiles showed no clear maxima. Highest values up to 37.3 nmol L ?1 occurred in the tropical North Atlantic with clear maxima at approximately 400 m. A positive correlation of nitrous oxide with nitrate, as well as excess nitrous oxide with the apparent oxygen utilization (AOU), was only observed in the subtropical and tropical regions. Therefore, we conclude that the formation of nitrous oxide via nitrification occurs in the tropical region rather than in the cold-temperate region of the North Atlantic Ocean |
author2 |
Forschungsbereich Marine Biogeochemie Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR) |
format |
Article in Journal/Newspaper |
author |
Walter, S. Bange, H. W. Breitenbach, U. Wallace, D. W. R. |
author_facet |
Walter, S. Bange, H. W. Breitenbach, U. Wallace, D. W. R. |
author_sort |
Walter, S. |
title |
Nitrous oxide in the North Atlantic Ocean |
title_short |
Nitrous oxide in the North Atlantic Ocean |
title_full |
Nitrous oxide in the North Atlantic Ocean |
title_fullStr |
Nitrous oxide in the North Atlantic Ocean |
title_full_unstemmed |
Nitrous oxide in the North Atlantic Ocean |
title_sort |
nitrous oxide in the north atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00297585 https://hal.science/hal-00297585/document https://hal.science/hal-00297585/file/bg-3-607-2006.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-00297585 Biogeosciences, 2006, 3 (4), pp.607-619 |
op_relation |
hal-00297585 https://hal.science/hal-00297585 https://hal.science/hal-00297585/document https://hal.science/hal-00297585/file/bg-3-607-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782336935121911808 |