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Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90819-6

Mary Swallow

引用次数: 0

Equatorial undercurrents 赤道暗流

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90830-5

James R. Luyten , J.C. Swallow

引用次数: 0

Clay mineralogy and sedimentation in the western Indian ocean 西印度洋的粘土矿物学与沉积

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90825-1

Venkatarathnam Kolla , Lawrence Henderson , Pierre E. Biscaye

{"title":"Clay mineralogy and sedimentation in the western Indian ocean","authors":"Venkatarathnam Kolla , Lawrence Henderson , Pierre E. Biscaye","doi":"10.1016/0011-7471(76)90825-1","DOIUrl":"https://doi.org/10.1016/0011-7471(76)90825-1","url":null,"abstract":"<div><p>The clay mineralogy of 235 surface sediment samples from the western Indian Ocean reveals many sedimentary sources and processes: (1) some areas, mainly in the central Indian Ocean, where very little sediment transport is involved, have smectite-rich clays derived from the alteration of <em>in situ</em> submarine basalts. (2) In many other areas, the mineralogy is significantly influenced by several modes of long-distance sediment transport, and the continental climate or the southern ocean volcanism. These areas consist of: (a) smectite-rich sediments in the Crozet and Madagascar basins and in the eastern Arabian Sea; (b) illite-rich sediments in the Indus Cone, the Agulhas Basin, and the ocean adjacent to Africa west of the Agulhas Plateau; (c) illite-palygorskite-rich sediments in the Carlsberg Ridge, Owen Ridge and in the westernmost Arabian Sea; (d) illite-kaolinite-rich sediments in the Mozambique Basin and in the regions between Madagascar and Africa; (e) kaolinite-rich sediments adjacent to central Africa and Madagascar. (3) A third category of areas has mixed type sediments with no specific mineral in characteristically high amounts. Mixing of sediments derived from the alteration of <em>in situ</em> submarine basalts and/or from other areas rich in different minerals resulted in this group.</p><p>The mineral distributions suggest that the Antarctic Bottom Water circulation is responsible for the sediment dispersal in the Crozet, Madagascar, Agulhas and Mozambique basins. Although the aeolian process could be effective throughout the Arabian Sea, it is dominant only in the western Arabian Sea.</p></div>","PeriodicalId":11253,"journal":{"name":"Deep Sea Research and Oceanographic Abstracts","volume":"23 10","pages":"Pages 949-961"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0011-7471(76)90825-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137316260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Objective analysis of meso-scale ocean circulation features 中尺度海洋环流特征的客观分析

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90822-6

H.J. Freeland , W.J. Gould

引用次数: 58

Biological accomodation in the deep-sea benthos: comparative evidence on the importance of predation and productivity 深海底栖生物的生物适应性:捕食和生产力重要性的比较证据

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90827-5

Michael A. Rex

{"title":"Biological accomodation in the deep-sea benthos: comparative evidence on the importance of predation and productivity","authors":"Michael A. Rex","doi":"10.1016/0011-7471(76)90827-5","DOIUrl":"10.1016/0011-7471(76)90827-5","url":null,"abstract":"<div><p>Measures of the diversity and relative abundance of gastropod predators are positively and significantly correlated with overall gastropod diversity in 15 epibenthic sled samples collected from 478 to 4862 m along the Gay Head-Bermuda transect. Predator diversity is lowest on the abyssal plain, highest on the lower continental slope and abyssal rise, and relatively low on the upper continental slope. The variation of gastropod predator diversity with depth is similar to those of their most probable prey, the polychaetes and protobranch bivalves. Predator diversity and overall diversity were also related to variation in faunal density with depth. Density decreases exponentially with depth and reflects the average rate of production reaching the deep-sea benthos. Relationships among diversity, predation, and production are consistent with the theory that predators exert a diversifying influence on communities and that the degree to which they are able to do this depends on the rate and stability of production. The results suggest that both predation and productivity are important to biological accomodation in deep-sea communities and that their relative contributions to maintaining diversity vary considerably with depth.</p></div>","PeriodicalId":11253,"journal":{"name":"Deep Sea Research and Oceanographic Abstracts","volume":"23 10","pages":"Pages 975-987"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0011-7471(76)90827-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76217819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 87

Recueil des travaux du centre oceanologique de bretagne, 布列塔尼海洋中心的工作汇编，

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90833-0

G.E.R. Deacon

引用次数: 0

A simple system for recovering zooplanktonic faecal pellets in quantity 一种简单的浮游动物粪便颗粒定量回收系统

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90829-9

Jacques La Rosa

引用次数: 19

Preliminary communication 初步的沟通

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90831-7

引用次数: 0

The formation and destruction of fine-structure by double-diffusive processes 双扩散过程中精细结构的形成与破坏

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-10-01 DOI: 10.1016/0011-7471(76)90820-2

P.F. Linden

{"title":"The formation and destruction of fine-structure by double-diffusive processes","authors":"P.F. Linden","doi":"10.1016/0011-7471(76)90820-2","DOIUrl":"10.1016/0011-7471(76)90820-2","url":null,"abstract":"<div><p>The formation of layered structure by the imposition of an unstable buoyancy flux on a region containing opposing, uniform gradients of two components is examined. <span>Turner</span> (<em>Journal of Fluid Mechanics</em>, <strong>33</strong>, 183–200, 1968) investigated the formation of layers when a stable salinity gradient is heated from below. The present work is an extension of his, allowing for the presence of a destabilizing temperature gradient in the interior of the fluid. Experiments were carried out using two solutes (sugar and salt) as the components contributing to the density field. It is found theoretically, and confirmed by experiment, that the scale of the layers depends on the ratio of the two density gradients in the interior <em>G</em>ϱ. The layers were observed to form sequentially with increasing distance from the boundary across which the buoyancy flux was applied. The relative contributions of the energy provided by the boundary flux and that stored in the destabilizing component during the formation of the first layer are found to depend on <em>G</em>ϱ but not on the magnitude of the boundary flux. When <em>Gϱ</em>=0, and there is no destabilizing density gradient, all the energy comes from the imposed flux. As <em>Gϱ</em>→1, the energy from the destabilizing component becomes more important, providing all the energy in the limit. Some observations of destruction of fine-structure are reported. Two kinds were observed. One type was characterized by the vertical migration of an interface to an adjacent one thereby destroying the layer in between. The other kind was identified by a breakdown of an interface <em>in situ</em>, apparently resulting from an equalization of the density of the two layers on either side. Finally some brief comparisons with oceanic fine-structure are made.</p></div>","PeriodicalId":11253,"journal":{"name":"Deep Sea Research and Oceanographic Abstracts","volume":"23 10","pages":"Pages 895-900, IN1-IN4, 901-908"},"PeriodicalIF":0.0,"publicationDate":"1976-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0011-7471(76)90820-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73211801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

An oceanic frontal jet near the Norfolk Ridge northwest of New Zealand 新西兰西北部诺福克山脊附近的海洋锋面急流

Deep Sea Research and Oceanographic Abstracts Pub Date : 1976-09-01 DOI: 10.1016/0011-7471(76)90849-4

B.R Stanton

引用次数: 20