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Silicon flux and distribution of biogenic silica in deep-sea sediments in the western NJorth Pacific Ocean
VVe investigated biogenic silica, several biological components, and silicate in pore-water in the abyssal sediment to determine silicon flux of western North Pacific during several cruises. The surficial sediment biogenic silica content was high at high latitudes with the boundary running along the...
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| Published in: | Deep-sea research. Part I, Oceanographic research papers Oceanographic research papers, 2010-02, Vol.57 (2), p.163 |
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| creator | Shibamoto, Yoko Harada, Koh |
| description | VVe investigated biogenic silica, several biological components, and silicate in pore-water in the abyssal sediment to determine silicon flux of western North Pacific during several cruises. The surficial sediment biogenic silica content was high at high latitudes with the boundary running along the Kuroshio Extension, and maximum values (exceeding 20%) were found in the Oyashio region. In the subtropical region to the south, most stations showed less than 5% biogenic silica content. This distribution pattern reflected primary production and ocean currents in the surface layer very well. Pore-water samples were collected from 4 stations along the east coast of Japan. The highest asymptotic silidc add concentration 670 ...1/4mol L...) in pore water was observed at the junction of Kuroshio and Oyashio, followed by samples from the Oyasbio region. It is at the southern station that the lowest value 450 ...1/4mol L...) was observed, and the primary production is low under the influence of Kuroshio there. The diffusive flux followed the same geographic trend as the asymptotic silicic acid concentrations did, ranging 77-389 mmol m... yr... Multiple sampling of pore-water was conducted throughout the year at one station at high latitude. The average annual biogenic silica rain flux observed using sediment traps was 373 mmol m... yr... the diffusive flux and burial flux at the sediment-water interface were 305 and 9 mmol m... yr... respectively. We concluded that most of the settling silica particles dissolved and diffused at the sediment-water interface and approximately 3% only were preserved in this area. In addition, the obvious time lag observed between the peak rain flux and the maximum diffusive flux suggested that primary production in the surface layer has a great influence on the sedimentation environment of abyssal western North Pacific. These transitions of Si flux at the sediment-water interface were considerably greater in northwestern North Pacific than in southwestern North Pacific. In addition, a station in the Philippine Sea indicated high biogenic silica content because of Ethmodiscus ooze, which are scattered randomly on the sea floor in the subtropical region. (ProQuest: ... denotes formulae/symbols omitted.) |
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The surficial sediment biogenic silica content was high at high latitudes with the boundary running along the Kuroshio Extension, and maximum values (exceeding 20%) were found in the Oyashio region. In the subtropical region to the south, most stations showed less than 5% biogenic silica content. This distribution pattern reflected primary production and ocean currents in the surface layer very well. Pore-water samples were collected from 4 stations along the east coast of Japan. The highest asymptotic silidc add concentration 670 ...1/4mol L...) in pore water was observed at the junction of Kuroshio and Oyashio, followed by samples from the Oyasbio region. It is at the southern station that the lowest value 450 ...1/4mol L...) was observed, and the primary production is low under the influence of Kuroshio there. The diffusive flux followed the same geographic trend as the asymptotic silicic acid concentrations did, ranging 77-389 mmol m... yr... Multiple sampling of pore-water was conducted throughout the year at one station at high latitude. The average annual biogenic silica rain flux observed using sediment traps was 373 mmol m... yr... the diffusive flux and burial flux at the sediment-water interface were 305 and 9 mmol m... yr... respectively. We concluded that most of the settling silica particles dissolved and diffused at the sediment-water interface and approximately 3% only were preserved in this area. In addition, the obvious time lag observed between the peak rain flux and the maximum diffusive flux suggested that primary production in the surface layer has a great influence on the sedimentation environment of abyssal western North Pacific. These transitions of Si flux at the sediment-water interface were considerably greater in northwestern North Pacific than in southwestern North Pacific. In addition, a station in the Philippine Sea indicated high biogenic silica content because of Ethmodiscus ooze, which are scattered randomly on the sea floor in the subtropical region. (ProQuest: ... denotes formulae/symbols omitted.)</description><identifier>ISSN: 0967-0637</identifier><language>eng</language><publisher>Oxford: Pergamon Press Inc</publisher><subject>Diffusion ; Ocean currents ; Oceanography ; Sedimentation & deposition ; Silica</subject><ispartof>Deep-sea research. Part I, Oceanographic research papers, 2010-02, Vol.57 (2), p.163</ispartof><rights>Copyright Pergamon Press Inc. 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The surficial sediment biogenic silica content was high at high latitudes with the boundary running along the Kuroshio Extension, and maximum values (exceeding 20%) were found in the Oyashio region. In the subtropical region to the south, most stations showed less than 5% biogenic silica content. This distribution pattern reflected primary production and ocean currents in the surface layer very well. Pore-water samples were collected from 4 stations along the east coast of Japan. The highest asymptotic silidc add concentration 670 ...1/4mol L...) in pore water was observed at the junction of Kuroshio and Oyashio, followed by samples from the Oyasbio region. It is at the southern station that the lowest value 450 ...1/4mol L...) was observed, and the primary production is low under the influence of Kuroshio there. The diffusive flux followed the same geographic trend as the asymptotic silicic acid concentrations did, ranging 77-389 mmol m... yr... Multiple sampling of pore-water was conducted throughout the year at one station at high latitude. The average annual biogenic silica rain flux observed using sediment traps was 373 mmol m... yr... the diffusive flux and burial flux at the sediment-water interface were 305 and 9 mmol m... yr... respectively. We concluded that most of the settling silica particles dissolved and diffused at the sediment-water interface and approximately 3% only were preserved in this area. In addition, the obvious time lag observed between the peak rain flux and the maximum diffusive flux suggested that primary production in the surface layer has a great influence on the sedimentation environment of abyssal western North Pacific. These transitions of Si flux at the sediment-water interface were considerably greater in northwestern North Pacific than in southwestern North Pacific. In addition, a station in the Philippine Sea indicated high biogenic silica content because of Ethmodiscus ooze, which are scattered randomly on the sea floor in the subtropical region. 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Part I, Oceanographic research papers</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shibamoto, Yoko</au><au>Harada, Koh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Silicon flux and distribution of biogenic silica in deep-sea sediments in the western NJorth Pacific Ocean</atitle><jtitle>Deep-sea research. Part I, Oceanographic research papers</jtitle><date>2010-02-01</date><risdate>2010</risdate><volume>57</volume><issue>2</issue><spage>163</spage><pages>163-</pages><issn>0967-0637</issn><abstract>VVe investigated biogenic silica, several biological components, and silicate in pore-water in the abyssal sediment to determine silicon flux of western North Pacific during several cruises. The surficial sediment biogenic silica content was high at high latitudes with the boundary running along the Kuroshio Extension, and maximum values (exceeding 20%) were found in the Oyashio region. In the subtropical region to the south, most stations showed less than 5% biogenic silica content. This distribution pattern reflected primary production and ocean currents in the surface layer very well. Pore-water samples were collected from 4 stations along the east coast of Japan. The highest asymptotic silidc add concentration 670 ...1/4mol L...) in pore water was observed at the junction of Kuroshio and Oyashio, followed by samples from the Oyasbio region. It is at the southern station that the lowest value 450 ...1/4mol L...) was observed, and the primary production is low under the influence of Kuroshio there. The diffusive flux followed the same geographic trend as the asymptotic silicic acid concentrations did, ranging 77-389 mmol m... yr... Multiple sampling of pore-water was conducted throughout the year at one station at high latitude. The average annual biogenic silica rain flux observed using sediment traps was 373 mmol m... yr... the diffusive flux and burial flux at the sediment-water interface were 305 and 9 mmol m... yr... respectively. We concluded that most of the settling silica particles dissolved and diffused at the sediment-water interface and approximately 3% only were preserved in this area. In addition, the obvious time lag observed between the peak rain flux and the maximum diffusive flux suggested that primary production in the surface layer has a great influence on the sedimentation environment of abyssal western North Pacific. These transitions of Si flux at the sediment-water interface were considerably greater in northwestern North Pacific than in southwestern North Pacific. In addition, a station in the Philippine Sea indicated high biogenic silica content because of Ethmodiscus ooze, which are scattered randomly on the sea floor in the subtropical region. (ProQuest: ... denotes formulae/symbols omitted.)</abstract><cop>Oxford</cop><pub>Pergamon Press Inc</pub></addata></record> |
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| identifier | ISSN: 0967-0637 |
| ispartof | Deep-sea research. Part I, Oceanographic research papers, 2010-02, Vol.57 (2), p.163 |
| issn | 0967-0637 |
| language | eng |
| recordid | cdi_proquest_journals_196739169 |
| source | ScienceDirect Freedom Collection 2022-2024 |
| subjects | Diffusion Ocean currents Oceanography Sedimentation & deposition Silica |
| title | Silicon flux and distribution of biogenic silica in deep-sea sediments in the western NJorth Pacific Ocean |
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