Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049
The Arctic sea-ice extent reached a record minimum in September 2012. Sea-ice decline increases the absorption of solar energy in the Arctic Ocean, affecting primary production and the plankton community. How this will modulate the sinking of particulate organic carbon (POC) from the ocean surface r...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.858790 https://doi.pangaea.de/10.1594/PANGAEA.858790 |
id |
ftdatacite:10.1594/pangaea.858790 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.858790 2023-05-15T14:50:14+02:00 Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 Roca-Martí, Montserrat Puigcorbé, Viena Stimac, Ingrid Rutgers van der Loeff, Michiel M Masqué, Pere 2016 application/zip https://dx.doi.org/10.1594/pangaea.858790 https://doi.pangaea.de/10.1594/PANGAEA.858790 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1002/2016jc011816 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY article Supplementary Collection of Datasets Collection 2016 ftdatacite https://doi.org/10.1594/pangaea.858790 https://doi.org/10.1002/2016jc011816 2022-02-09T13:17:41Z The Arctic sea-ice extent reached a record minimum in September 2012. Sea-ice decline increases the absorption of solar energy in the Arctic Ocean, affecting primary production and the plankton community. How this will modulate the sinking of particulate organic carbon (POC) from the ocean surface remains a key question. We use the 234Th/238U and 210Po/210Pb radionuclide pairs to estimate the magnitude of the POC export fluxes in the upper ocean of the central Arctic in summer 2012, covering time scales from weeks to months. The 234Th/238U proxy reveals that POC fluxes at the base of the euphotic zone were very low (2 ± 2 mmol C/m**2/d) in late summer. Relationships obtained between the 234Th export fluxes and the phytoplankton community suggest that prasinophytes contributed significantly to the downward fluxes, likely via incorporation into sea-ice algal aggregates and zooplankton-derived material. The magnitude of the depletion of 210Po in the upper water column over the entire study area indicates that particle export fluxes were higher before July/August than later in the season. 210Po fluxes and 210Po-derived POC fluxes correlated positively with sea-ice concentration, showing that particle sinking was greater under heavy sea-ice conditions than under partially ice-covered regions. Although the POC fluxes were low, a large fraction of primary production (>30%) was exported at the base of the euphotic zone in most of the study area during summer 2012, indicating a high export efficiency of the biological pump in the central Arctic. This article is protected by copyright. All rights reserved. Article in Journal/Newspaper Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton DataCite Metadata Store (German National Library of Science and Technology) Arctic Arctic Ocean Roca ENVELOPE(-44.817,-44.817,-60.733,-60.733) The Ark ENVELOPE(-24.789,-24.789,-80.691,-80.691) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
The Arctic sea-ice extent reached a record minimum in September 2012. Sea-ice decline increases the absorption of solar energy in the Arctic Ocean, affecting primary production and the plankton community. How this will modulate the sinking of particulate organic carbon (POC) from the ocean surface remains a key question. We use the 234Th/238U and 210Po/210Pb radionuclide pairs to estimate the magnitude of the POC export fluxes in the upper ocean of the central Arctic in summer 2012, covering time scales from weeks to months. The 234Th/238U proxy reveals that POC fluxes at the base of the euphotic zone were very low (2 ± 2 mmol C/m**2/d) in late summer. Relationships obtained between the 234Th export fluxes and the phytoplankton community suggest that prasinophytes contributed significantly to the downward fluxes, likely via incorporation into sea-ice algal aggregates and zooplankton-derived material. The magnitude of the depletion of 210Po in the upper water column over the entire study area indicates that particle export fluxes were higher before July/August than later in the season. 210Po fluxes and 210Po-derived POC fluxes correlated positively with sea-ice concentration, showing that particle sinking was greater under heavy sea-ice conditions than under partially ice-covered regions. Although the POC fluxes were low, a large fraction of primary production (>30%) was exported at the base of the euphotic zone in most of the study area during summer 2012, indicating a high export efficiency of the biological pump in the central Arctic. This article is protected by copyright. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Roca-Martí, Montserrat Puigcorbé, Viena Stimac, Ingrid Rutgers van der Loeff, Michiel M Masqué, Pere |
spellingShingle |
Roca-Martí, Montserrat Puigcorbé, Viena Stimac, Ingrid Rutgers van der Loeff, Michiel M Masqué, Pere Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
author_facet |
Roca-Martí, Montserrat Puigcorbé, Viena Stimac, Ingrid Rutgers van der Loeff, Michiel M Masqué, Pere |
author_sort |
Roca-Martí, Montserrat |
title |
Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
title_short |
Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
title_full |
Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
title_fullStr |
Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
title_full_unstemmed |
Th-234 and Po-210 as POC flux proxies during the ARK-XXVII/3 expedition (August-October 2012), supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Rutgers van der Loeff, Michiel M; Katlein, Christian; Fernández-Méndez, Mar; Peeken, Ilka; Masqué, Pere (2016): Carbon export fluxes and export efficiency in the central Arctic during the record sea-ice minimum in 2012: A joint 234Th/238U and 210Po/210Pb study. Journal of Geophysical Research: Oceans, 121(7), 5030-5049 |
title_sort |
th-234 and po-210 as poc flux proxies during the ark-xxvii/3 expedition (august-october 2012), supplement to: roca-martí, montserrat; puigcorbé, viena; rutgers van der loeff, michiel m; katlein, christian; fernández-méndez, mar; peeken, ilka; masqué, pere (2016): carbon export fluxes and export efficiency in the central arctic during the record sea-ice minimum in 2012: a joint 234th/238u and 210po/210pb study. journal of geophysical research: oceans, 121(7), 5030-5049 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2016 |
url |
https://dx.doi.org/10.1594/pangaea.858790 https://doi.pangaea.de/10.1594/PANGAEA.858790 |
long_lat |
ENVELOPE(-44.817,-44.817,-60.733,-60.733) ENVELOPE(-24.789,-24.789,-80.691,-80.691) |
geographic |
Arctic Arctic Ocean Roca The Ark |
geographic_facet |
Arctic Arctic Ocean Roca The Ark |
genre |
Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton |
genre_facet |
Arctic Arctic Ocean Phytoplankton Sea ice Zooplankton |
op_relation |
https://dx.doi.org/10.1002/2016jc011816 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.858790 https://doi.org/10.1002/2016jc011816 |
_version_ |
1766321276213788672 |