Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa
Fluxes of major bioelements associated with sinking particles were quantified in late summer 2018 as part of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) field campaign near Ocean Station Papa in the subarctic northeast Pacific. The thorium-234 method was used in conjunction with...
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ftuabarcelonapb:oai:ddd.uab.cat:299233 2024-09-30T14:44:33+00:00 Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa Roca MartÃ, Montserrat Benitez-Nelson, Claudia Umhau, Blaire P. Wyatt, Abigale M. Clevenger, Samantha J. Pike, Steven Horner, Tristan J. Estapa, Margaret L. Resplandy, Laure Buesseler, Ken 2021 application/pdf https://ddd.uab.cat/record/299233 eng eng Elementa (Washington DC) Vol. 9, Num. 1 (June 2021), art. 00166 https://ddd.uab.cat/record/299233 urn:10.1525/elementa.2020.00166 urn:oai:ddd.uab.cat:299233 urn:oai:egreta.uab.cat:publications/048ffeca-3621-4e55-bddd-a49f4e93e7a1 urn:pure_id:289728413 urn:scopus_id:85117409564 urn:articleid:23251026v9n1p166 open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. https://creativecommons.org/licenses/by/4.0/ Bioelements Biological pump EXPORTS Particulate fluxes Size-fractionated particles Transfer efficiency Article 2021 ftuabarcelonapb 2024-09-04T06:59:38Z Fluxes of major bioelements associated with sinking particles were quantified in late summer 2018 as part of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) field campaign near Ocean Station Papa in the subarctic northeast Pacific. The thorium-234 method was used in conjunction with size-fractionated (1-5, 5-51, and >51 mm) concentrations of particulate nitrogen (PN), total particulate phosphorus (TPP), biogenic silica (bSi), and particulate inorganic carbon (PIC) collected using large volume filtration via in situ pumps. We build upon recent work quantifying POC fluxes during EXPORTS. Similar remineralization length scales were observed for both POC and PN across all particle size classes from depths of 50-500 m. Unlike bSi and PIC, the soft tissue-associated POC, PN, and TPP fluxes strongly attenuated from 50 m to the base of the euphotic zone (approximately 120 m). Cruise-average thorium-234-derived fluxes (mmol m-2 d-1) at 120 m were 1.7 + 0.6 for POC, 0.22 + 0.07 for PN, 0.019 + 0.007 for TPP, 0.69 + 0.26 for bSi, and 0.055 + 0.022 for PIC. These bioelement fluxes were similar to previous observations at this site, with the exception of PIC, which was 1 to 2 orders of magnitude lower. Transfer efficiencies within the upper twilight zone (flux 220 m/flux 120 m) were highest for PIC (84%) and bSi (79%), followed by POC (61%), PN (58%), and TPP (49%). These differences indicate preferential remineralization of TPP relative to POC or PN and larger losses of soft tissue relative to biominerals in sinking particles below the euphotic zone. Comprehensive characterization of the particulate bioelement fluxes obtained here will support future efforts linking phytoplankton community composition and food-web dynamics to the composition, magnitude, and attenuation of material that sinks to deeper waters. Article in Journal/Newspaper Subarctic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Pacific |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Bioelements Biological pump EXPORTS Particulate fluxes Size-fractionated particles Transfer efficiency |
spellingShingle |
Bioelements Biological pump EXPORTS Particulate fluxes Size-fractionated particles Transfer efficiency Roca MartÃ, Montserrat Benitez-Nelson, Claudia Umhau, Blaire P. Wyatt, Abigale M. Clevenger, Samantha J. Pike, Steven Horner, Tristan J. Estapa, Margaret L. Resplandy, Laure Buesseler, Ken Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
topic_facet |
Bioelements Biological pump EXPORTS Particulate fluxes Size-fractionated particles Transfer efficiency |
description |
Fluxes of major bioelements associated with sinking particles were quantified in late summer 2018 as part of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) field campaign near Ocean Station Papa in the subarctic northeast Pacific. The thorium-234 method was used in conjunction with size-fractionated (1-5, 5-51, and >51 mm) concentrations of particulate nitrogen (PN), total particulate phosphorus (TPP), biogenic silica (bSi), and particulate inorganic carbon (PIC) collected using large volume filtration via in situ pumps. We build upon recent work quantifying POC fluxes during EXPORTS. Similar remineralization length scales were observed for both POC and PN across all particle size classes from depths of 50-500 m. Unlike bSi and PIC, the soft tissue-associated POC, PN, and TPP fluxes strongly attenuated from 50 m to the base of the euphotic zone (approximately 120 m). Cruise-average thorium-234-derived fluxes (mmol m-2 d-1) at 120 m were 1.7 + 0.6 for POC, 0.22 + 0.07 for PN, 0.019 + 0.007 for TPP, 0.69 + 0.26 for bSi, and 0.055 + 0.022 for PIC. These bioelement fluxes were similar to previous observations at this site, with the exception of PIC, which was 1 to 2 orders of magnitude lower. Transfer efficiencies within the upper twilight zone (flux 220 m/flux 120 m) were highest for PIC (84%) and bSi (79%), followed by POC (61%), PN (58%), and TPP (49%). These differences indicate preferential remineralization of TPP relative to POC or PN and larger losses of soft tissue relative to biominerals in sinking particles below the euphotic zone. Comprehensive characterization of the particulate bioelement fluxes obtained here will support future efforts linking phytoplankton community composition and food-web dynamics to the composition, magnitude, and attenuation of material that sinks to deeper waters. |
format |
Article in Journal/Newspaper |
author |
Roca MartÃ, Montserrat Benitez-Nelson, Claudia Umhau, Blaire P. Wyatt, Abigale M. Clevenger, Samantha J. Pike, Steven Horner, Tristan J. Estapa, Margaret L. Resplandy, Laure Buesseler, Ken |
author_facet |
Roca MartÃ, Montserrat Benitez-Nelson, Claudia Umhau, Blaire P. Wyatt, Abigale M. Clevenger, Samantha J. Pike, Steven Horner, Tristan J. Estapa, Margaret L. Resplandy, Laure Buesseler, Ken |
author_sort |
Roca MartÃ, Montserrat |
title |
Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
title_short |
Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
title_full |
Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
title_fullStr |
Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
title_full_unstemmed |
Concentrations, ratios, and sinking fluxes of major bioelements at Ocean Station Papa |
title_sort |
concentrations, ratios, and sinking fluxes of major bioelements at ocean station papa |
publishDate |
2021 |
url |
https://ddd.uab.cat/record/299233 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
Elementa (Washington DC) Vol. 9, Num. 1 (June 2021), art. 00166 https://ddd.uab.cat/record/299233 urn:10.1525/elementa.2020.00166 urn:oai:ddd.uab.cat:299233 urn:oai:egreta.uab.cat:publications/048ffeca-3621-4e55-bddd-a49f4e93e7a1 urn:pure_id:289728413 urn:scopus_id:85117409564 urn:articleid:23251026v9n1p166 |
op_rights |
open access Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. https://creativecommons.org/licenses/by/4.0/ |
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1811645760979075072 |