Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014
New production (New P, the rate of net primary production (NPP) supported by exogenously supplied limiting nutrients) and net community production (NCP, gross primary production not consumed by community respiration) are closely related but mechanistically distinct processes. They set the carbon bal...
Published in: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/67119/ https://ueaeprints.uea.ac.uk/id/eprint/67119/1/Ducklow_et_al_final_NCP_Ms.pdf https://doi.org/10.1098/rsta.2017.0177 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:67119 2023-06-06T11:45:51+02:00 Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicholas 2018-06-28 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/67119/ https://ueaeprints.uea.ac.uk/id/eprint/67119/1/Ducklow_et_al_final_NCP_Ms.pdf https://doi.org/10.1098/rsta.2017.0177 en eng https://ueaeprints.uea.ac.uk/id/eprint/67119/1/Ducklow_et_al_final_NCP_Ms.pdf Ducklow, Hugh W., Stukel, Michael R., Eveleth, Rachel, Doney, Scott C., Jickells, Tim, Schofield, Oscar, Baker, Alex R., Brindle, John, Chance, Rosie and Cassar, Nicholas (2018) Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014. Philosophical Transactions of the Royal Society A, 376 (2122). ISSN 1471-2962 doi:10.1098/rsta.2017.0177 Article PeerReviewed 2018 ftuniveastangl https://doi.org/10.1098/rsta.2017.0177 2023-04-13T22:32:04Z New production (New P, the rate of net primary production (NPP) supported by exogenously supplied limiting nutrients) and net community production (NCP, gross primary production not consumed by community respiration) are closely related but mechanistically distinct processes. They set the carbon balance in the upper ocean and define an upper limit for export from the system. The relationships, relative magnitudes and variability of New P (from 15NO3– uptake), O2 : argon-based NCP and sinking particle export (based on the 238U : 234Th disequilibrium) are increasingly well documented but still not clearly understood. This is especially true in remote regions such as polar marginal ice zones. Here we present a 3-year dataset of simultaneous measurements made at approximately 50 stations along the Western Antarctic Peninsula (WAP) continental shelf in midsummer (January) 2012–2014. Net seasonal-scale changes in water column inventories (0–150 m) of nitrate and iodide were also estimated at the same stations. The average daily rates based on inventory changes exceeded the shorter-term rate measurements. A major uncertainty in the relative magnitude of the inventory estimates is specifying the start of the growing season following sea-ice retreat. New P and NCP(O2) did not differ significantly. New P and NCP(O2) were significantly greater than sinking particle export from thorium-234. We suggest this is a persistent and systematic imbalance and that other processes such as vertical mixing and advection of suspended particles are important export pathways. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice University of East Anglia: UEA Digital Repository Antarctic Antarctic Peninsula Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376 2122 20170177 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
New production (New P, the rate of net primary production (NPP) supported by exogenously supplied limiting nutrients) and net community production (NCP, gross primary production not consumed by community respiration) are closely related but mechanistically distinct processes. They set the carbon balance in the upper ocean and define an upper limit for export from the system. The relationships, relative magnitudes and variability of New P (from 15NO3– uptake), O2 : argon-based NCP and sinking particle export (based on the 238U : 234Th disequilibrium) are increasingly well documented but still not clearly understood. This is especially true in remote regions such as polar marginal ice zones. Here we present a 3-year dataset of simultaneous measurements made at approximately 50 stations along the Western Antarctic Peninsula (WAP) continental shelf in midsummer (January) 2012–2014. Net seasonal-scale changes in water column inventories (0–150 m) of nitrate and iodide were also estimated at the same stations. The average daily rates based on inventory changes exceeded the shorter-term rate measurements. A major uncertainty in the relative magnitude of the inventory estimates is specifying the start of the growing season following sea-ice retreat. New P and NCP(O2) did not differ significantly. New P and NCP(O2) were significantly greater than sinking particle export from thorium-234. We suggest this is a persistent and systematic imbalance and that other processes such as vertical mixing and advection of suspended particles are important export pathways. |
format |
Article in Journal/Newspaper |
author |
Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicholas |
spellingShingle |
Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicholas Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
author_facet |
Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicholas |
author_sort |
Ducklow, Hugh W. |
title |
Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
title_short |
Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
title_full |
Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
title_fullStr |
Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
title_full_unstemmed |
Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014 |
title_sort |
spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the western antarctic peninsula 2012–2014 |
publishDate |
2018 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/67119/ https://ueaeprints.uea.ac.uk/id/eprint/67119/1/Ducklow_et_al_final_NCP_Ms.pdf https://doi.org/10.1098/rsta.2017.0177 |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/67119/1/Ducklow_et_al_final_NCP_Ms.pdf Ducklow, Hugh W., Stukel, Michael R., Eveleth, Rachel, Doney, Scott C., Jickells, Tim, Schofield, Oscar, Baker, Alex R., Brindle, John, Chance, Rosie and Cassar, Nicholas (2018) Spring–summer net community production, new production, particle export and related water column biogeochemical processes in the marginal sea ice zone of the Western Antarctic Peninsula 2012–2014. Philosophical Transactions of the Royal Society A, 376 (2122). ISSN 1471-2962 doi:10.1098/rsta.2017.0177 |
op_doi |
https://doi.org/10.1098/rsta.2017.0177 |
container_title |
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
container_volume |
376 |
container_issue |
2122 |
container_start_page |
20170177 |
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1767951053190332416 |