Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current
The carbon cycle of the Arctic Ocean is tightly regulated by land-atmosphere-cryosphere-ocean interactions. Characterizing these environmental exchanges and feedbacks is critical to facilitate projections of the carbon cycle under changing climate conditions. The environmental drivers of sinking par...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier Ltd
2015
|
Subjects: | |
Online Access: | http://hdl.handle.net/2445/127765 |
id |
ftubarcepubl:oai:diposit.ub.edu:2445/127765 |
---|---|
record_format |
openpolar |
spelling |
ftubarcepubl:oai:diposit.ub.edu:2445/127765 2024-06-23T07:50:01+00:00 Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat Frau, Antoni Canals Artigas, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jürgen Grimalt Obrador, Joan Pusceddu, Antonio Danovaro, Roberto 2015-09 20 p. application/pdf http://hdl.handle.net/2445/127765 eng eng Elsevier Ltd Versió postprint del document publicat a: https://doi.org/10.1016/j.dsr.2015.06.002 Deep-Sea Research Part I-Oceanographic Research Papers, 2015, vol. 103, p. 49-63 https://doi.org/10.1016/j.dsr.2015.06.002 info:eu-repo/grantAgreement/EC/FP7/226354/EU//HERMIONE 0967-0637 http://hdl.handle.net/2445/127765 656982 cc-by-nc-nd (c) Elsevier Ltd, 2015 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) Geotècnia marina Marine geotechnics info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion 2015 ftubarcepubl https://doi.org/10.1016/j.dsr.2015.06.002 2024-06-04T23:49:10Z The carbon cycle of the Arctic Ocean is tightly regulated by land-atmosphere-cryosphere-ocean interactions. Characterizing these environmental exchanges and feedbacks is critical to facilitate projections of the carbon cycle under changing climate conditions. The environmental drivers of sinking particles including organic carbon (OC) to the deep-sea floor are investigated with four moorings including sediment traps and currentmeters at the Arctic gateway in the eastern Fram Strait, which is the area where warm anomalies are transported northwards to the Arctic. Particles fluxes were collected over one year (July 2010-July 2011) and have been analysed to obtain the content of the lithogenic fraction, calcium carbonate, OC and its stable isotopes, opal, and the grain size. Records of near bottom current speed and temperature along with satellite observations of sea ice extent and chlorophyll-a concentration have been used for evaluation of the environmental conditions. We found increased lithogenic fluxes (up to 9872 mg m−2 d−1) and coarsening grain size of settling particles in late winter-early spring. At the same time, intensifications of the northward flowing west Spitsbergen current (WSC) were recorded. The WSC was able to resuspend and transport northwards sediments that were deposited at the outlet of Storfjordrenna and on the upper slope west of Spitsbergen. The signal of recurrent winnowing of fine particles was also detected in the top layer of surface sediments. In addition, an increased arrival of sea ice transported ice rafted detritus (>414 detrital carbonate mineral grains larger than 1 mm per m2) from the southern Spitsbergen coast along with terrestrial organic matter was observed beyond 1000 m of water depth during winter months. Finally, the downward particle fluxes showed typical temporal variability of high latitudes, with high percentages of the biogenic compounds (opal, organic carbon and calcium carbonate) linked to the phytoplankton bloom in spring-summer. However, on an annual basis ... Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen Dipòsit Digital de la Universitat de Barcelona Arctic Arctic Ocean Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Deep Sea Research Part I: Oceanographic Research Papers 103 49 63 |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Geotècnia marina Marine geotechnics |
spellingShingle |
Geotècnia marina Marine geotechnics Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat Frau, Antoni Canals Artigas, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jürgen Grimalt Obrador, Joan Pusceddu, Antonio Danovaro, Roberto Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
topic_facet |
Geotècnia marina Marine geotechnics |
description |
The carbon cycle of the Arctic Ocean is tightly regulated by land-atmosphere-cryosphere-ocean interactions. Characterizing these environmental exchanges and feedbacks is critical to facilitate projections of the carbon cycle under changing climate conditions. The environmental drivers of sinking particles including organic carbon (OC) to the deep-sea floor are investigated with four moorings including sediment traps and currentmeters at the Arctic gateway in the eastern Fram Strait, which is the area where warm anomalies are transported northwards to the Arctic. Particles fluxes were collected over one year (July 2010-July 2011) and have been analysed to obtain the content of the lithogenic fraction, calcium carbonate, OC and its stable isotopes, opal, and the grain size. Records of near bottom current speed and temperature along with satellite observations of sea ice extent and chlorophyll-a concentration have been used for evaluation of the environmental conditions. We found increased lithogenic fluxes (up to 9872 mg m−2 d−1) and coarsening grain size of settling particles in late winter-early spring. At the same time, intensifications of the northward flowing west Spitsbergen current (WSC) were recorded. The WSC was able to resuspend and transport northwards sediments that were deposited at the outlet of Storfjordrenna and on the upper slope west of Spitsbergen. The signal of recurrent winnowing of fine particles was also detected in the top layer of surface sediments. In addition, an increased arrival of sea ice transported ice rafted detritus (>414 detrital carbonate mineral grains larger than 1 mm per m2) from the southern Spitsbergen coast along with terrestrial organic matter was observed beyond 1000 m of water depth during winter months. Finally, the downward particle fluxes showed typical temporal variability of high latitudes, with high percentages of the biogenic compounds (opal, organic carbon and calcium carbonate) linked to the phytoplankton bloom in spring-summer. However, on an annual basis ... |
format |
Article in Journal/Newspaper |
author |
Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat Frau, Antoni Canals Artigas, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jürgen Grimalt Obrador, Joan Pusceddu, Antonio Danovaro, Roberto |
author_facet |
Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat Frau, Antoni Canals Artigas, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jürgen Grimalt Obrador, Joan Pusceddu, Antonio Danovaro, Roberto |
author_sort |
Sanchez-Vidal, Anna |
title |
Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
title_short |
Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
title_full |
Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
title_fullStr |
Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
title_full_unstemmed |
Particle sources and downward fluxes in the Eastern Fram Strait under the influence of the West Spitsbergen Current |
title_sort |
particle sources and downward fluxes in the eastern fram strait under the influence of the west spitsbergen current |
publisher |
Elsevier Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/2445/127765 |
long_lat |
ENVELOPE(17.000,17.000,76.000,76.000) |
geographic |
Arctic Arctic Ocean Storfjordrenna |
geographic_facet |
Arctic Arctic Ocean Storfjordrenna |
genre |
Arctic Arctic Ocean Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen |
genre_facet |
Arctic Arctic Ocean Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen |
op_source |
Articles publicats en revistes (Dinàmica de la Terra i l'Oceà) |
op_relation |
Versió postprint del document publicat a: https://doi.org/10.1016/j.dsr.2015.06.002 Deep-Sea Research Part I-Oceanographic Research Papers, 2015, vol. 103, p. 49-63 https://doi.org/10.1016/j.dsr.2015.06.002 info:eu-repo/grantAgreement/EC/FP7/226354/EU//HERMIONE 0967-0637 http://hdl.handle.net/2445/127765 656982 |
op_rights |
cc-by-nc-nd (c) Elsevier Ltd, 2015 http://creativecommons.org/licenses/by-nc-nd/3.0/es info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2015.06.002 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
103 |
container_start_page |
49 |
op_container_end_page |
63 |
_version_ |
1802640764485763072 |