Particle sources and downward fluxes in the eastern Fram strait under the influence of the west Spitsbergen current
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.dsr.2015.06.002 . Licensed CC BY-NC-ND 4.0. The carbon cycle of the Arctic Ocean is tightly regulated by land–atmosphere–cryosphere–ocean interactions. Characterizing these environmental exchanges and feedbacks is...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2015
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/14164 https://doi.org/10.1016/j.dsr.2015.06.002 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/14164 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Particle fluxes Organic Carbon Ice rafted detritus West Spitsbergen current Fram Strait |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Particle fluxes Organic Carbon Ice rafted detritus West Spitsbergen current Fram Strait Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat, Antoni Canals, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jurgen Grimalt, Joan O. Pusceddu, Antonio Danovaro, Roberto Particle sources and downward fluxes in the eastern Fram strait under the influence of the west Spitsbergen current |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Particle fluxes Organic Carbon Ice rafted detritus West Spitsbergen current Fram Strait |
description |
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.dsr.2015.06.002 . Licensed CC BY-NC-ND 4.0. 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 local planktonic production was a secondary source for the downward OC, since most of the OC was advected laterally by the WSC. Overall, these observations demonstrated the sensitivity of the downward flux of particles to environmental conditions such as hydrodynamics, sea ice rafting, and pelagic primary production. Future alteration of the patterns of natural drivers due to climate change is thus expected to cause major shifts in the downward flux of particles, including carbon, to the deep sea ecosystems. |
format |
Article in Journal/Newspaper |
author |
Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat, Antoni Canals, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jurgen Grimalt, Joan O. Pusceddu, Antonio Danovaro, Roberto |
author_facet |
Sanchez-Vidal, Anna Veres, Oriol Langone, Leonardo Ferré, Benedicte Calafat, Antoni Canals, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jurgen Grimalt, Joan O. 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 |
publishDate |
2015 |
url |
https://hdl.handle.net/10037/14164 https://doi.org/10.1016/j.dsr.2015.06.002 |
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 Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen |
genre_facet |
Arctic Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen |
op_relation |
Deep Sea Research Part I: Oceanographic Research Papers info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Sanchez-Vidal A, Veres O, Langone L, Ferré B, Calafat A, Canals M, Durrieu de Madron, Heussner S, Mienert J, Grimalt JO, Pusceddu A, Danovaro R. Particle sources and downward fluxes in the eastern Fram strait under the influence of the west Spitsbergen current. Deep Sea Research Part I: Oceanographic Research Papers. 2015;103:49-63 FRIDAID 1248657 doi:10.1016/j.dsr.2015.06.002 0967-0637 1879-0119 https://hdl.handle.net/10037/14164 |
op_rights |
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_ |
1766301650488655872 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/14164 2023-05-15T14:27:45+02:00 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, Antoni Canals, Miquel Durrieu de Madron, Xavier Heussner, Serge Mienert, Jurgen Grimalt, Joan O. Pusceddu, Antonio Danovaro, Roberto 2015-06-10 https://hdl.handle.net/10037/14164 https://doi.org/10.1016/j.dsr.2015.06.002 eng eng Elsevier Deep Sea Research Part I: Oceanographic Research Papers info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Sanchez-Vidal A, Veres O, Langone L, Ferré B, Calafat A, Canals M, Durrieu de Madron, Heussner S, Mienert J, Grimalt JO, Pusceddu A, Danovaro R. Particle sources and downward fluxes in the eastern Fram strait under the influence of the west Spitsbergen current. Deep Sea Research Part I: Oceanographic Research Papers. 2015;103:49-63 FRIDAID 1248657 doi:10.1016/j.dsr.2015.06.002 0967-0637 1879-0119 https://hdl.handle.net/10037/14164 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 Particle fluxes Organic Carbon Ice rafted detritus West Spitsbergen current Fram Strait Journal article Tidsskriftartikkel Peer reviewed 2015 ftunivtroemsoe https://doi.org/10.1016/j.dsr.2015.06.002 2021-06-25T17:55:44Z Accepted manuscript version. Published version available at https://doi.org/10.1016/j.dsr.2015.06.002 . Licensed CC BY-NC-ND 4.0. 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 local planktonic production was a secondary source for the downward OC, since most of the OC was advected laterally by the WSC. Overall, these observations demonstrated the sensitivity of the downward flux of particles to environmental conditions such as hydrodynamics, sea ice rafting, and pelagic primary production. Future alteration of the patterns of natural drivers due to climate change is thus expected to cause major shifts in the downward flux of particles, including carbon, to the deep sea ecosystems. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice Storfjordrenna Spitsbergen University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Deep Sea Research Part I: Oceanographic Research Papers 103 49 63 |