The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array
Author Posting. © The Oceanography Society, 2018. This article is posted here by permission of The Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 31, no. 1 (2018): 42–49, doi:10.5670/oceanog.2018.108. The biological pump plays a ke...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/10229 2023-05-15T17:30:09+02:00 The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array Palevsky, Hilary I. Nicholson, David P. 2018-02-09 https://hdl.handle.net/1912/10229 en_US eng The Oceanography Society https://doi.org/10.5670/oceanog.2018.108 Oceanography 31, no. 1 (2018): 42–49 https://hdl.handle.net/1912/10229 doi:10.5670/oceanog.2018.108 Oceanography 31, no. 1 (2018): 42–49 doi:10.5670/oceanog.2018.108 Article 2018 ftwhoas https://doi.org/10.5670/oceanog.2018.108 2022-05-28T23:00:21Z Author Posting. © The Oceanography Society, 2018. This article is posted here by permission of The Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 31, no. 1 (2018): 42–49, doi:10.5670/oceanog.2018.108. The biological pump plays a key role in the global carbon cycle by transporting photosynthetically fixed organic carbon into the deep ocean, where it can be sequestered from the atmosphere over annual or longer time scales if exported below the winter ventilation depth. In the subpolar North Atlantic, carbon sequestration via the biological pump is influenced by two competing forces: a spring diatom bloom that features large, fast-sinking biogenic particles, and deep winter mixing that requires particles to sink much further than in other ocean regions to escape winter ventilation. We synthesize biogeochemical sensor data from the first two years of operations at the Ocean Observatories Initiative Irminger Sea Array of moorings and gliders (September 2014–July 2016), providing the first simultaneous year-round observations of biological carbon cycling processes in both the surface ocean and the seasonal thermocline in this critical but previously undersampled region. These data show significant mixed layer net autotrophy during the spring bloom and significant respiration in the seasonal thermocline during the stratified season (~5.9 mol C m–2 remineralized between 200 m and 1,000 m). This respired carbon is subsequently ventilated during winter convective mixing (>1,000 m), a significant reduction in potential carbon sequestration. This highlights the importance of year-round observations to accurately constrain the biological pump in the subpolar North Atlantic, as well as other high-latitude regions that experience deep winter mixing. Hilary Palevsky acknowledges support from the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Weston Howland Jr. Postdoctoral Scholarship. Article in Journal/Newspaper North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Oceanography 31 1 42 49 |
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Open Polar |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
description |
Author Posting. © The Oceanography Society, 2018. This article is posted here by permission of The Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 31, no. 1 (2018): 42–49, doi:10.5670/oceanog.2018.108. The biological pump plays a key role in the global carbon cycle by transporting photosynthetically fixed organic carbon into the deep ocean, where it can be sequestered from the atmosphere over annual or longer time scales if exported below the winter ventilation depth. In the subpolar North Atlantic, carbon sequestration via the biological pump is influenced by two competing forces: a spring diatom bloom that features large, fast-sinking biogenic particles, and deep winter mixing that requires particles to sink much further than in other ocean regions to escape winter ventilation. We synthesize biogeochemical sensor data from the first two years of operations at the Ocean Observatories Initiative Irminger Sea Array of moorings and gliders (September 2014–July 2016), providing the first simultaneous year-round observations of biological carbon cycling processes in both the surface ocean and the seasonal thermocline in this critical but previously undersampled region. These data show significant mixed layer net autotrophy during the spring bloom and significant respiration in the seasonal thermocline during the stratified season (~5.9 mol C m–2 remineralized between 200 m and 1,000 m). This respired carbon is subsequently ventilated during winter convective mixing (>1,000 m), a significant reduction in potential carbon sequestration. This highlights the importance of year-round observations to accurately constrain the biological pump in the subpolar North Atlantic, as well as other high-latitude regions that experience deep winter mixing. Hilary Palevsky acknowledges support from the Postdoctoral Scholar Program at the Woods Hole Oceanographic Institution, with funding provided by the Weston Howland Jr. Postdoctoral Scholarship. |
format |
Article in Journal/Newspaper |
author |
Palevsky, Hilary I. Nicholson, David P. |
spellingShingle |
Palevsky, Hilary I. Nicholson, David P. The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
author_facet |
Palevsky, Hilary I. Nicholson, David P. |
author_sort |
Palevsky, Hilary I. |
title |
The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
title_short |
The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
title_full |
The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
title_fullStr |
The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
title_full_unstemmed |
The North Atlantic biological pump : insights from the Ocean Observatories Initiative Irminger Sea Array |
title_sort |
north atlantic biological pump : insights from the ocean observatories initiative irminger sea array |
publisher |
The Oceanography Society |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/10229 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Oceanography 31, no. 1 (2018): 42–49 doi:10.5670/oceanog.2018.108 |
op_relation |
https://doi.org/10.5670/oceanog.2018.108 Oceanography 31, no. 1 (2018): 42–49 https://hdl.handle.net/1912/10229 doi:10.5670/oceanog.2018.108 |
op_doi |
https://doi.org/10.5670/oceanog.2018.108 |
container_title |
Oceanography |
container_volume |
31 |
container_issue |
1 |
container_start_page |
42 |
op_container_end_page |
49 |
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1766125961692053504 |