Fluvial and hydrothermal input of manganese into the Arctic Ocean
A total of 773 samples were analysed for dissolved manganese (Mn) in the Arctic Ocean aboard R. V. Polarstern during expedition ARK XXII/2 from 28 July until 07 October 2007 from Tromso (Norway) to Bremerhaven. Concentrations of Mn were elevated in the surface layer with concentrations of up to 6 nM...
Published in: | Geochimica et Cosmochimica Acta |
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Language: | English |
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2011
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Online Access: | https://hdl.handle.net/11370/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://research.rug.nl/en/publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://doi.org/10.1016/j.gca.2011.02.011 |
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ftunigroningenpu:oai:pure.rug.nl:publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 2024-06-23T07:48:30+00:00 Fluvial and hydrothermal input of manganese into the Arctic Ocean Middag, R. de Baar, H. J. W. Laan, P. Klunder, M. B. 2011-05-01 https://hdl.handle.net/11370/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://research.rug.nl/en/publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://doi.org/10.1016/j.gca.2011.02.011 eng eng https://research.rug.nl/en/publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 info:eu-repo/semantics/closedAccess Middag , R , de Baar , H J W , Laan , P & Klunder , M B 2011 , ' Fluvial and hydrothermal input of manganese into the Arctic Ocean ' , Geochimica et Cosmochimica Acta , vol. 75 , no. 9 , pp. 2393-2408 . https://doi.org/10.1016/j.gca.2011.02.011 CONTINENTAL-MARGIN SEDIMENTS TRACE-METALS OXYGEN MINIMUM ATLANTIC-OCEAN PACIFIC-OCEAN BLACK-SEA IRON WATER DEEP ICE article 2011 ftunigroningenpu https://doi.org/10.1016/j.gca.2011.02.011 2024-06-03T16:26:37Z A total of 773 samples were analysed for dissolved manganese (Mn) in the Arctic Ocean aboard R. V. Polarstern during expedition ARK XXII/2 from 28 July until 07 October 2007 from Tromso (Norway) to Bremerhaven. Concentrations of Mn were elevated in the surface layer with concentrations of up to 6 nM over the deep Basins and over 20 nM in the Laptev Sea. The general distribution of Mn through the water column is consistent with previous studies, but there are differences in the absolute concentrations that are most likely related to differences in sample area, sampling and filtration. The elevated concentrations of Mn in the surface layer are related to fresh water input. This was visible in the strong negative correlations observed between dissolved Mn and salinity. The correlation between Mn and salinity and the correlation between Mn and the quasi conservative trace water mass tracer PO(4)*, showed fluvial and melt water input and the Pacific and Atlantic origin of the surface waters. A large portion of the Mn delivered by the Arctic rivers is removed in the shelf seas and does not pass into the central basins. Most likely a benthic flux is at the origin of the elevated concentrations of Mn near the sediments in the Barents and Kara Seas. These elevated concentrations of Mn apparently affected the deep basins as well, as maxima in the concentrations of Mn were observed that corresponded with lowered transmission over the continental slope. A maximum in the concentration of Mn in the deep basin corresponded with anomalies in light transmission, potential temperature and dissolved iron, confirming the hydrothermal origin. The hydrothermal plume was observed throughout the Nansen Basin and over the deep Gakkel Ridge around 2500 m depth and a smaller plume was observed around 3200 m. The concentration of Mn at the Mn maximum around 2500 m depth decreased exponentially, consistent with a first order scavenging model. The concentrations of Mn were extremely low in the deep Makarov Basin (similar to 0.05 nM) and ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean laptev Laptev Sea makarov basin Nansen Nansen Basin Tromso Tromso University of Groningen research database Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) Laptev Sea Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Norway Pacific Tromso ENVELOPE(16.546,16.546,68.801,68.801) Geochimica et Cosmochimica Acta 75 9 2393 2408 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
CONTINENTAL-MARGIN SEDIMENTS TRACE-METALS OXYGEN MINIMUM ATLANTIC-OCEAN PACIFIC-OCEAN BLACK-SEA IRON WATER DEEP ICE |
spellingShingle |
CONTINENTAL-MARGIN SEDIMENTS TRACE-METALS OXYGEN MINIMUM ATLANTIC-OCEAN PACIFIC-OCEAN BLACK-SEA IRON WATER DEEP ICE Middag, R. de Baar, H. J. W. Laan, P. Klunder, M. B. Fluvial and hydrothermal input of manganese into the Arctic Ocean |
topic_facet |
CONTINENTAL-MARGIN SEDIMENTS TRACE-METALS OXYGEN MINIMUM ATLANTIC-OCEAN PACIFIC-OCEAN BLACK-SEA IRON WATER DEEP ICE |
description |
A total of 773 samples were analysed for dissolved manganese (Mn) in the Arctic Ocean aboard R. V. Polarstern during expedition ARK XXII/2 from 28 July until 07 October 2007 from Tromso (Norway) to Bremerhaven. Concentrations of Mn were elevated in the surface layer with concentrations of up to 6 nM over the deep Basins and over 20 nM in the Laptev Sea. The general distribution of Mn through the water column is consistent with previous studies, but there are differences in the absolute concentrations that are most likely related to differences in sample area, sampling and filtration. The elevated concentrations of Mn in the surface layer are related to fresh water input. This was visible in the strong negative correlations observed between dissolved Mn and salinity. The correlation between Mn and salinity and the correlation between Mn and the quasi conservative trace water mass tracer PO(4)*, showed fluvial and melt water input and the Pacific and Atlantic origin of the surface waters. A large portion of the Mn delivered by the Arctic rivers is removed in the shelf seas and does not pass into the central basins. Most likely a benthic flux is at the origin of the elevated concentrations of Mn near the sediments in the Barents and Kara Seas. These elevated concentrations of Mn apparently affected the deep basins as well, as maxima in the concentrations of Mn were observed that corresponded with lowered transmission over the continental slope. A maximum in the concentration of Mn in the deep basin corresponded with anomalies in light transmission, potential temperature and dissolved iron, confirming the hydrothermal origin. The hydrothermal plume was observed throughout the Nansen Basin and over the deep Gakkel Ridge around 2500 m depth and a smaller plume was observed around 3200 m. The concentration of Mn at the Mn maximum around 2500 m depth decreased exponentially, consistent with a first order scavenging model. The concentrations of Mn were extremely low in the deep Makarov Basin (similar to 0.05 nM) and ... |
format |
Article in Journal/Newspaper |
author |
Middag, R. de Baar, H. J. W. Laan, P. Klunder, M. B. |
author_facet |
Middag, R. de Baar, H. J. W. Laan, P. Klunder, M. B. |
author_sort |
Middag, R. |
title |
Fluvial and hydrothermal input of manganese into the Arctic Ocean |
title_short |
Fluvial and hydrothermal input of manganese into the Arctic Ocean |
title_full |
Fluvial and hydrothermal input of manganese into the Arctic Ocean |
title_fullStr |
Fluvial and hydrothermal input of manganese into the Arctic Ocean |
title_full_unstemmed |
Fluvial and hydrothermal input of manganese into the Arctic Ocean |
title_sort |
fluvial and hydrothermal input of manganese into the arctic ocean |
publishDate |
2011 |
url |
https://hdl.handle.net/11370/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://research.rug.nl/en/publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 https://doi.org/10.1016/j.gca.2011.02.011 |
long_lat |
ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(170.000,170.000,87.000,87.000) ENVELOPE(16.546,16.546,68.801,68.801) |
geographic |
Arctic Arctic Ocean Gakkel Ridge Laptev Sea Makarov Basin Norway Pacific Tromso |
geographic_facet |
Arctic Arctic Ocean Gakkel Ridge Laptev Sea Makarov Basin Norway Pacific Tromso |
genre |
Arctic Arctic Arctic Ocean laptev Laptev Sea makarov basin Nansen Nansen Basin Tromso Tromso |
genre_facet |
Arctic Arctic Arctic Ocean laptev Laptev Sea makarov basin Nansen Nansen Basin Tromso Tromso |
op_source |
Middag , R , de Baar , H J W , Laan , P & Klunder , M B 2011 , ' Fluvial and hydrothermal input of manganese into the Arctic Ocean ' , Geochimica et Cosmochimica Acta , vol. 75 , no. 9 , pp. 2393-2408 . https://doi.org/10.1016/j.gca.2011.02.011 |
op_relation |
https://research.rug.nl/en/publications/6f1ba3ac-20dc-4b70-ad9c-76ac17e60c12 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.gca.2011.02.011 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
75 |
container_issue |
9 |
container_start_page |
2393 |
op_container_end_page |
2408 |
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1802638898289967104 |