Dissolved aluminium in the Southern Ocean
Dissolved aluminium (Al) occurs in a wide range of concentrations in the world oceans. The concentrations of Al in the Southern Ocean are among the lowest ever observed. An all-titanium CTD sampling system makes it possible to study complete deep ocean sections of Al and other trace elements with th...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://hdl.handle.net/11370/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://research.rug.nl/en/publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://doi.org/10.1016/j.dsr2.2011.03.001 |
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ftunigroningenpu:oai:pure.rug.nl:publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 2024-06-23T07:50:55+00:00 Dissolved aluminium in the Southern Ocean Middag, R. van Slooten, C. de Baar, H. J. W. Laan, P. 2011-12-15 https://hdl.handle.net/11370/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://research.rug.nl/en/publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://doi.org/10.1016/j.dsr2.2011.03.001 eng eng https://research.rug.nl/en/publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 info:eu-repo/semantics/closedAccess Middag , R , van Slooten , C , de Baar , H J W & Laan , P 2011 , ' Dissolved aluminium in the Southern Ocean ' , Deep-Sea research part ii-Topical studies in oceanography , vol. 58 , no. 25-26 , pp. 2647-2660 . https://doi.org/10.1016/j.dsr2.2011.03.001 Trace metals GEOTRACES Southern ocean Dissolved aluminium Aluminium cycle FLOW-INJECTION ANALYSIS CENTRAL NORTH PACIFIC ATLANTIC SECTOR BIOGENIC SILICA IOC STATIONS ARCTIC-OCEAN DEEP-WATER SEA AL SEAWATER article 2011 ftunigroningenpu https://doi.org/10.1016/j.dsr2.2011.03.001 2024-05-27T16:05:39Z Dissolved aluminium (Al) occurs in a wide range of concentrations in the world oceans. The concentrations of Al in the Southern Ocean are among the lowest ever observed. An all-titanium CTD sampling system makes it possible to study complete deep ocean sections of Al and other trace elements with the same high vertical resolution of 24 depths as normal for traditional CTD/Rosette sampling. Overall, 470 new data points of Al are reported for 22 full depth stations and 24 surface sampling positions along one transect. This transect consisted of 18 stations on the zero meridian proper from 51 degrees 57'S until 69 degrees 24'S, and 4 stations somewhat to the northeast towards Cape Town from 42 degrees 20'S, 09 degrees E to 50 degrees 17'S, 01 degrees 27'E. The actual concentrations of Al in the Southern Ocean were lower than previously reported. The concentration of Al in the upper 25 m was relatively elevated with an average concentration of 0.71 nM (n=22; S.D.=0.43 nM), most likely due to atmospheric input by a suggested combination of direct atmospheric (wet and dry) input and indirect atmospheric input via melting sea ice. Below the surface waters there was a distinct Al minimum with an average concentration of 0.33 nM (n=22: S.D.=0.13 nM) at an average depth of 120 m. In the deep southern-most Weddell Basin the concentration of Al increased with depth to similar to 0.8 nM at 4000 m, and a higher concentration of similar to 1.5 nM in the similar to 4500-5200 m deep Weddell Sea Bottom Water. Over the Bouvet triple junction region, where three deep ocean ridges meet, the concentration of Al increased to similar to 1.4 nM at about 2000 m depth over the ridge crest. In the deep basin north of the Bouvet region the concentration of Al increased to higher deep values of 4-6 nM due to influence of North Atlantic Deep Water. In general the intermediate and deep distribution of Al results from the mixing of water masses with different origins, the formation of deep water and additional input from sedimentary sources at ... Article in Journal/Newspaper Arctic Arctic Ocean North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea University of Groningen research database Arctic Arctic Ocean Bouvet ENVELOPE(3.358,3.358,-54.422,-54.422) Pacific Southern Ocean Weddell Weddell Basin ENVELOPE(32.019,32.019,-55.568,-55.568) Weddell Sea Deep Sea Research Part II: Topical Studies in Oceanography 58 25-26 2647 2660 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
Trace metals GEOTRACES Southern ocean Dissolved aluminium Aluminium cycle FLOW-INJECTION ANALYSIS CENTRAL NORTH PACIFIC ATLANTIC SECTOR BIOGENIC SILICA IOC STATIONS ARCTIC-OCEAN DEEP-WATER SEA AL SEAWATER |
spellingShingle |
Trace metals GEOTRACES Southern ocean Dissolved aluminium Aluminium cycle FLOW-INJECTION ANALYSIS CENTRAL NORTH PACIFIC ATLANTIC SECTOR BIOGENIC SILICA IOC STATIONS ARCTIC-OCEAN DEEP-WATER SEA AL SEAWATER Middag, R. van Slooten, C. de Baar, H. J. W. Laan, P. Dissolved aluminium in the Southern Ocean |
topic_facet |
Trace metals GEOTRACES Southern ocean Dissolved aluminium Aluminium cycle FLOW-INJECTION ANALYSIS CENTRAL NORTH PACIFIC ATLANTIC SECTOR BIOGENIC SILICA IOC STATIONS ARCTIC-OCEAN DEEP-WATER SEA AL SEAWATER |
description |
Dissolved aluminium (Al) occurs in a wide range of concentrations in the world oceans. The concentrations of Al in the Southern Ocean are among the lowest ever observed. An all-titanium CTD sampling system makes it possible to study complete deep ocean sections of Al and other trace elements with the same high vertical resolution of 24 depths as normal for traditional CTD/Rosette sampling. Overall, 470 new data points of Al are reported for 22 full depth stations and 24 surface sampling positions along one transect. This transect consisted of 18 stations on the zero meridian proper from 51 degrees 57'S until 69 degrees 24'S, and 4 stations somewhat to the northeast towards Cape Town from 42 degrees 20'S, 09 degrees E to 50 degrees 17'S, 01 degrees 27'E. The actual concentrations of Al in the Southern Ocean were lower than previously reported. The concentration of Al in the upper 25 m was relatively elevated with an average concentration of 0.71 nM (n=22; S.D.=0.43 nM), most likely due to atmospheric input by a suggested combination of direct atmospheric (wet and dry) input and indirect atmospheric input via melting sea ice. Below the surface waters there was a distinct Al minimum with an average concentration of 0.33 nM (n=22: S.D.=0.13 nM) at an average depth of 120 m. In the deep southern-most Weddell Basin the concentration of Al increased with depth to similar to 0.8 nM at 4000 m, and a higher concentration of similar to 1.5 nM in the similar to 4500-5200 m deep Weddell Sea Bottom Water. Over the Bouvet triple junction region, where three deep ocean ridges meet, the concentration of Al increased to similar to 1.4 nM at about 2000 m depth over the ridge crest. In the deep basin north of the Bouvet region the concentration of Al increased to higher deep values of 4-6 nM due to influence of North Atlantic Deep Water. In general the intermediate and deep distribution of Al results from the mixing of water masses with different origins, the formation of deep water and additional input from sedimentary sources at ... |
format |
Article in Journal/Newspaper |
author |
Middag, R. van Slooten, C. de Baar, H. J. W. Laan, P. |
author_facet |
Middag, R. van Slooten, C. de Baar, H. J. W. Laan, P. |
author_sort |
Middag, R. |
title |
Dissolved aluminium in the Southern Ocean |
title_short |
Dissolved aluminium in the Southern Ocean |
title_full |
Dissolved aluminium in the Southern Ocean |
title_fullStr |
Dissolved aluminium in the Southern Ocean |
title_full_unstemmed |
Dissolved aluminium in the Southern Ocean |
title_sort |
dissolved aluminium in the southern ocean |
publishDate |
2011 |
url |
https://hdl.handle.net/11370/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://research.rug.nl/en/publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 https://doi.org/10.1016/j.dsr2.2011.03.001 |
long_lat |
ENVELOPE(3.358,3.358,-54.422,-54.422) ENVELOPE(32.019,32.019,-55.568,-55.568) |
geographic |
Arctic Arctic Ocean Bouvet Pacific Southern Ocean Weddell Weddell Basin Weddell Sea |
geographic_facet |
Arctic Arctic Ocean Bouvet Pacific Southern Ocean Weddell Weddell Basin Weddell Sea |
genre |
Arctic Arctic Ocean North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea |
genre_facet |
Arctic Arctic Ocean North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Weddell Sea |
op_source |
Middag , R , van Slooten , C , de Baar , H J W & Laan , P 2011 , ' Dissolved aluminium in the Southern Ocean ' , Deep-Sea research part ii-Topical studies in oceanography , vol. 58 , no. 25-26 , pp. 2647-2660 . https://doi.org/10.1016/j.dsr2.2011.03.001 |
op_relation |
https://research.rug.nl/en/publications/76bb9139-4d85-420f-99f4-9c5a578e1df7 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2011.03.001 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
58 |
container_issue |
25-26 |
container_start_page |
2647 |
op_container_end_page |
2660 |
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1802641871295479808 |