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: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5954475/ http://www.ncbi.nlm.nih.gov/pubmed/29760119 https://doi.org/10.1098/rsta.2017.0177 |
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ftpubmed:oai:pubmedcentral.nih.gov:5954475 2023-05-15T13:51:43+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, Nicolas 2018-06-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5954475/ http://www.ncbi.nlm.nih.gov/pubmed/29760119 https://doi.org/10.1098/rsta.2017.0177 en eng The Royal Society Publishing http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5954475/ http://www.ncbi.nlm.nih.gov/pubmed/29760119 http://dx.doi.org/10.1098/rsta.2017.0177 © 2018 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Articles Text 2018 ftpubmed https://doi.org/10.1098/rsta.2017.0177 2019-06-30T00:47:19Z 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 (15)NO(3)(–) uptake), O(2) : argon-based NCP and sinking particle export (based on the (238)U : (234)Th 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(O(2)) did not differ significantly. New P and NCP(O(2)) 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. This article is part of the theme issue ‘The marine system of the west Antarctic Peninsula: status and strategy for progress in a region of rapid change’. Text Antarc* Antarctic Antarctic Peninsula Sea ice PubMed Central (PMC) Antarctic Antarctic Peninsula Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376 2122 20170177 |
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Articles Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicolas 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 |
topic_facet |
Articles |
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 (15)NO(3)(–) uptake), O(2) : argon-based NCP and sinking particle export (based on the (238)U : (234)Th 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(O(2)) did not differ significantly. New P and NCP(O(2)) 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. This article is part of the theme issue ‘The marine system of the west Antarctic Peninsula: status and strategy for progress in a region of rapid change’. |
format |
Text |
author |
Ducklow, Hugh W. Stukel, Michael R. Eveleth, Rachel Doney, Scott C. Jickells, Tim Schofield, Oscar Baker, Alex R. Brindle, John Chance, Rosie Cassar, Nicolas |
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, Nicolas |
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 |
publisher |
The Royal Society Publishing |
publishDate |
2018 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5954475/ http://www.ncbi.nlm.nih.gov/pubmed/29760119 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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5954475/ http://www.ncbi.nlm.nih.gov/pubmed/29760119 http://dx.doi.org/10.1098/rsta.2017.0177 |
op_rights |
© 2018 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
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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1766255736212422656 |