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
Unidad de excelencia MarÃa de Maeztu MdM-2015-0552 Altres ajuts: M.R.-M. and V.P. were supported by Spanish PhD fellowships (AP2010-2510 and AP2009-4733, respectively). The Arctic sea-ice extent reached a record minimum in September 2012. Sea-ice decline increases the absorption of solar energy in...
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ftuabarcelonapb:oai:ddd.uab.cat:187608 2024-09-15T17:54:08+00:00 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 Roca MartÃ, Montserrat Puigcorbé, Viena Rutgers van der Loeff, Michiel M. Katlein, Christian Fernández Méndez, Mar Peeken, Ilka Masqué Barri, Pere 2016 application/pdf https://ddd.uab.cat/record/187608 eng eng Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1356 Ministerio de Ciencia e Innovación CTM2011-2845-2 Ministerio de Educación, Cultura y Deporte AP2010-2510 Ministerio de Educación, Cultura y Deporte AP2009-4733 Journal of geophysical research: oceans Vol. 121 issue 7 (July 2016), p. 5030-5049 https://ddd.uab.cat/record/187608 urn:10.1002/2016JC011816 urn:oai:ddd.uab.cat:187608 urn:articleid:21699291v121n7p5030 urn:scopus_id:84983509079 urn:wos_id:000383468500036 urn:altmetric_id:8785088 urn:oai:egreta.uab.cat:publications/6f2d55b3-7f68-4619-90d9-144df7dd1deb open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Article 2016 ftuabarcelonapb 2024-08-06T14:30:49Z Unidad de excelencia MarÃa de Maeztu MdM-2015-0552 Altres ajuts: M.R.-M. and V.P. were supported by Spanish PhD fellowships (AP2010-2510 and AP2009-4733, respectively). 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−1) 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. Article in Journal/Newspaper Arctic Ocean Phytoplankton Sea ice Zooplankton Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Journal of Geophysical Research: Oceans 121 7 5030 5049 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
description |
Unidad de excelencia MarÃa de Maeztu MdM-2015-0552 Altres ajuts: M.R.-M. and V.P. were supported by Spanish PhD fellowships (AP2010-2510 and AP2009-4733, respectively). 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−1) 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. |
format |
Article in Journal/Newspaper |
author |
Roca MartÃ, Montserrat Puigcorbé, Viena Rutgers van der Loeff, Michiel M. Katlein, Christian Fernández Méndez, Mar Peeken, Ilka Masqué Barri, Pere |
spellingShingle |
Roca MartÃ, Montserrat Puigcorbé, Viena Rutgers van der Loeff, Michiel M. Katlein, Christian Fernández Méndez, Mar Peeken, Ilka Masqué Barri, Pere 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 |
author_facet |
Roca MartÃ, Montserrat Puigcorbé, Viena Rutgers van der Loeff, Michiel M. Katlein, Christian Fernández Méndez, Mar Peeken, Ilka Masqué Barri, Pere |
author_sort |
Roca MartÃ, Montserrat |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publishDate |
2016 |
url |
https://ddd.uab.cat/record/187608 |
genre |
Arctic Ocean Phytoplankton Sea ice Zooplankton |
genre_facet |
Arctic Ocean Phytoplankton Sea ice Zooplankton |
op_relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1356 Ministerio de Ciencia e Innovación CTM2011-2845-2 Ministerio de Educación, Cultura y Deporte AP2010-2510 Ministerio de Educación, Cultura y Deporte AP2009-4733 Journal of geophysical research: oceans Vol. 121 issue 7 (July 2016), p. 5030-5049 https://ddd.uab.cat/record/187608 urn:10.1002/2016JC011816 urn:oai:ddd.uab.cat:187608 urn:articleid:21699291v121n7p5030 urn:scopus_id:84983509079 urn:wos_id:000383468500036 urn:altmetric_id:8785088 urn:oai:egreta.uab.cat:publications/6f2d55b3-7f68-4619-90d9-144df7dd1deb |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
121 |
container_issue |
7 |
container_start_page |
5030 |
op_container_end_page |
5049 |
_version_ |
1810430351755968512 |