Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water
In the deep water of the eastern North Atlantic below 2000 m. the variations with depth of salinity, temperature, density, oxygen, phosphorus compounds and nitrate are quite small. By contrast the silicate content is doubled in a descent from 2000 to 4000 m. The distinctive behaviour of silicate is...
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Cambridge University Press (CUP)
1952
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Online Access: | http://dx.doi.org/10.1017/s0025315400012947 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012947 |
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crcambridgeupr:10.1017/s0025315400012947 2024-03-03T08:46:49+00:00 Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water Cooper, L. H. N. 1952 http://dx.doi.org/10.1017/s0025315400012947 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012947 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 30, issue 3, page 511-526 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 1952 crcambridgeupr https://doi.org/10.1017/s0025315400012947 2024-02-08T08:24:10Z In the deep water of the eastern North Atlantic below 2000 m. the variations with depth of salinity, temperature, density, oxygen, phosphorus compounds and nitrate are quite small. By contrast the silicate content is doubled in a descent from 2000 to 4000 m. The distinctive behaviour of silicate is revealed by diagrams (Fig. I) relating it to salinity, temperature, density and total phosphorus at station 2659 worked by R.R.S. Discovery II on 12 May 1950 (Armstrong, 1951; Cooper 1952, Table IV). The temperature-salinity diagram (Cooper, 1952, fig. 15, to 1500 m. only) suggests that between 1200 and 2000 m. we have to deal with simple mixing of the mean Gulf of Gibraltar and North Atlantic Deep waters. If silicate concentration were subject only to mixing processes the curves in Fig. I between these depths would be straight lines. They are not—consequently it would seem that solution of either particulate silica or of aluminosilicates may be occurring. As yet, clear interpretation is not possible. At least five hypotheses may be erected to explain, in whole or in. part, the observed distribution: (i) solution of bottom deposits; (ii) solution of ‘clay’ and of silica in suspension; (iii) concentration by vertical partition; (iv) tundra drainage; (v) sinking of surface water. These are examined in turn. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Tundra Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 30 3 511 526 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Cooper, L. H. N. Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
topic_facet |
Aquatic Science |
description |
In the deep water of the eastern North Atlantic below 2000 m. the variations with depth of salinity, temperature, density, oxygen, phosphorus compounds and nitrate are quite small. By contrast the silicate content is doubled in a descent from 2000 to 4000 m. The distinctive behaviour of silicate is revealed by diagrams (Fig. I) relating it to salinity, temperature, density and total phosphorus at station 2659 worked by R.R.S. Discovery II on 12 May 1950 (Armstrong, 1951; Cooper 1952, Table IV). The temperature-salinity diagram (Cooper, 1952, fig. 15, to 1500 m. only) suggests that between 1200 and 2000 m. we have to deal with simple mixing of the mean Gulf of Gibraltar and North Atlantic Deep waters. If silicate concentration were subject only to mixing processes the curves in Fig. I between these depths would be straight lines. They are not—consequently it would seem that solution of either particulate silica or of aluminosilicates may be occurring. As yet, clear interpretation is not possible. At least five hypotheses may be erected to explain, in whole or in. part, the observed distribution: (i) solution of bottom deposits; (ii) solution of ‘clay’ and of silica in suspension; (iii) concentration by vertical partition; (iv) tundra drainage; (v) sinking of surface water. These are examined in turn. |
format |
Article in Journal/Newspaper |
author |
Cooper, L. H. N. |
author_facet |
Cooper, L. H. N. |
author_sort |
Cooper, L. H. N. |
title |
Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
title_short |
Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
title_full |
Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
title_fullStr |
Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
title_full_unstemmed |
Factors affecting the distribution of silicate in the North Atlantic Ocean and the formation of North Atlantic deep water |
title_sort |
factors affecting the distribution of silicate in the north atlantic ocean and the formation of north atlantic deep water |
publisher |
Cambridge University Press (CUP) |
publishDate |
1952 |
url |
http://dx.doi.org/10.1017/s0025315400012947 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315400012947 |
genre |
North Atlantic Deep Water North Atlantic Tundra |
genre_facet |
North Atlantic Deep Water North Atlantic Tundra |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 30, issue 3, page 511-526 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315400012947 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
30 |
container_issue |
3 |
container_start_page |
511 |
op_container_end_page |
526 |
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1792502882406236160 |