Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream
Western boundary currents act as transport pathways for nutrient-rich waters from low to high latitudes (nutrient streams) and are responsible for maintaining midlatitude and high-latitude productivity in the North Atlantic and North Pacific. This study investigates the centennial oxygen ( O 2 ) and...
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ftdoajarticles:oai:doaj.org/article:029bf163cc1947b4bc410636070ddc8c 2023-05-15T17:28:32+02:00 Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream F. Tagklis T. Ito A. Bracco 2020-01-01T00:00:00Z https://doi.org/10.5194/bg-17-231-2020 https://doaj.org/article/029bf163cc1947b4bc410636070ddc8c EN eng Copernicus Publications https://www.biogeosciences.net/17/231/2020/bg-17-231-2020.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-17-231-2020 1726-4170 1726-4189 https://doaj.org/article/029bf163cc1947b4bc410636070ddc8c Biogeosciences, Vol 17, Pp 231-244 (2020) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.5194/bg-17-231-2020 2022-12-31T12:52:18Z Western boundary currents act as transport pathways for nutrient-rich waters from low to high latitudes (nutrient streams) and are responsible for maintaining midlatitude and high-latitude productivity in the North Atlantic and North Pacific. This study investigates the centennial oxygen ( O 2 ) and nutrient changes over the Northern Hemisphere in the context of the projected warming and general weakening of the Atlantic Meridional Overturning Circulation (AMOC) in a subset of Earth system models included in the CMIP5 catalogue. In all models examined, the Atlantic warms faster than the Pacific Ocean, resulting in a greater basin-scale solubility decrease. However, this thermodynamic tendency is compensated by changes in the biologically driven O 2 consumption which dominates the overall O 2 budget. These changes are linked to the slowdown of the nutrient stream in this basin, in response to the AMOC weakening. The North Atlantic resists the warming-induced deoxygenation due to the weakened biological carbon export and remineralization, leading to higher O 2 levels. Conversely, the projected nutrient stream and macronutrient inventory in the North Pacific remain nearly unchanged. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Pacific Biogeosciences 17 1 231 244 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 F. Tagklis T. Ito A. Bracco Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Western boundary currents act as transport pathways for nutrient-rich waters from low to high latitudes (nutrient streams) and are responsible for maintaining midlatitude and high-latitude productivity in the North Atlantic and North Pacific. This study investigates the centennial oxygen ( O 2 ) and nutrient changes over the Northern Hemisphere in the context of the projected warming and general weakening of the Atlantic Meridional Overturning Circulation (AMOC) in a subset of Earth system models included in the CMIP5 catalogue. In all models examined, the Atlantic warms faster than the Pacific Ocean, resulting in a greater basin-scale solubility decrease. However, this thermodynamic tendency is compensated by changes in the biologically driven O 2 consumption which dominates the overall O 2 budget. These changes are linked to the slowdown of the nutrient stream in this basin, in response to the AMOC weakening. The North Atlantic resists the warming-induced deoxygenation due to the weakened biological carbon export and remineralization, leading to higher O 2 levels. Conversely, the projected nutrient stream and macronutrient inventory in the North Pacific remain nearly unchanged. |
format |
Article in Journal/Newspaper |
author |
F. Tagklis T. Ito A. Bracco |
author_facet |
F. Tagklis T. Ito A. Bracco |
author_sort |
F. Tagklis |
title |
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
title_short |
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
title_full |
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
title_fullStr |
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
title_full_unstemmed |
Modulation of the North Atlantic deoxygenation by the slowdown of the nutrient stream |
title_sort |
modulation of the north atlantic deoxygenation by the slowdown of the nutrient stream |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/bg-17-231-2020 https://doaj.org/article/029bf163cc1947b4bc410636070ddc8c |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Biogeosciences, Vol 17, Pp 231-244 (2020) |
op_relation |
https://www.biogeosciences.net/17/231/2020/bg-17-231-2020.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-17-231-2020 1726-4170 1726-4189 https://doaj.org/article/029bf163cc1947b4bc410636070ddc8c |
op_doi |
https://doi.org/10.5194/bg-17-231-2020 |
container_title |
Biogeosciences |
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17 |
container_issue |
1 |
container_start_page |
231 |
op_container_end_page |
244 |
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1766121265899241472 |