A map series of the Southern East Pacific Rise and its flanks, 15° S to 19° S     

Daniel S. Scheirer  Ken C. Macdonald  Donald W. Forsyth  Stephen P. Miller  Dawn J. Wright  Marie-Hélène Cormier  Charles M. Weiland 《Marine Geophysical Researches》1996,18(1):1-12

Four large-scale bathymetric maps of the Southern East Pacific Rise and its flanks between 15° S and 19° S display many of the unique features of this superfast spreading environment including abundant seamounts (the Rano Rahi Field), axial discontinuities, discontinuity migration, and abyssal hill variation. Along with a summary of the regional geology, these maps will provide a valuable reference for other sea-going programs on-and off-axis in this area, including the Mantle ELectromagnetic and Tomography (MELT) experiment.  相似文献   

Far-field control of long-term changes in Northumberland (NW North Sea) coastal zooplankton     

Frid  Christopher L. J.; Huliselan  Niette V. 《ICES Journal of Marine Science》1996,53(6):972-977

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东白令海三种经济鲽类捕捞群体结构与生长特性比较     

苏振明 《中国海洋大学学报(自然科学版)》1992,(4)

对东白令海水域双线鲽(Lepidopsetta bilineata)、太平洋拟庸鲽(Hippoglosso-ides elassodon)和阿拉斯加鲽(Pleuronectes quadrituberculata)等三种经济鲽类的捕捞群体结构和生长特性进行比较。得出结论是:(1)捕捞群体结构复杂;(2)渐近体长和渐近体重较大、寿命长、K值小;(3)雌鱼比雄鱼个体大、生长快、寿命长;(4)三种鲽类的捕捞群体结构和生长特性有明显差异。  相似文献   

Several significant hydrographic characteristics and their formation mechanism in the South China Sea during the spring and summer of 1998   总被引：1，自引：1，他引：1  

Xu Jianping  Chai Fei  Liu Zenghong  Zhu Bokang 《海洋学报(英文版)》2003,22(4):491-502

INTRODUCTIONTheSCSisthelargestmarginseainthewestoftheNorthPacificOcean .Theprevailingwindinwinterisnortheast,whileinsummeritissouthwest .Itisstilluncertainthathowthecirculationandtemperature -salinityfieldassociatewiththemonsoonforcingandaccompanywithseveralkindsofvariationsbeforeorafterthesummermonsoonburst .DuringSECMEXin 1 998,twointensiveobservationperiods (IOP)havebeencarriedoutntheSCS (Fig 1 ) :IOP1 ,from 1 0Aprilto 5May ;IOP2 ,from 1 2JunetoJuly 6 ,inordertounderstandthe…  相似文献   

杭州湾乍浦断面潮流分布特征   总被引：4，自引：0，他引：4  

羊天柱  张俊彪  施伟勇 《海洋学研究》2002,20(4):1-7

根据2000年9月在杭州湾乍浦断面设置的8个潮流同步观测站的资料,对该断面潮流分布特征进行了分析和探讨,结果表明:该断面大潮涨急时呈现两个大流速核;断面南部的流速要比北部的大,涨潮流速大于落潮流速。这对了解杭州湾水文特征有着一定意义,同时为杭州湾跨海大桥的设计建设提供参考。  相似文献   

福清湾北部及其以东近岸海域沉积环境和沉积特征     

郑承忠 《台湾海峡》1997,16(4):386-392

本文对福清湾北部及其以东近岸海域的地质地貌，潮流和波浪等沉积环境因素，以及对沉积物和悬浮泥沙的粒度，矿物特征进行研究，认为福清湾为溺谷型的半封闭潮汐汊道海湾存在着较大的潮差和潮流流速，沉积物沿潮流方向呈东粗西细和岸边细、向海变粗的潮流分异特征，潮流控制着沉积物的布局，而属于潮控的浅海沉积环境。  相似文献   

东海陆架外缘隆起带地质构造特征   总被引：1，自引：0，他引：1  

李桂群  李学伦 《中国海洋大学学报(自然科学版)》1995,(2)

根据地质、地球物理及钻探资料，结合周边区域地质资料，论证东海外缘隆起带前中中新世基底岩系组成及地质构造特征。  相似文献   

中国鳚亚目鱼类地理分布和区系特征     

刘静  田明诚  赵元莙 《海洋科学集刊》2006,47(47):158-168

鳚亚目鱼类是鲈形目中较大的一个亚目，现知全世界有127属，700余种(Nelson，1994)。目前还不断有新种发现，多数为海洋鱼类，世界性分布。 鳚亚目鱼类大多体型较小，对它们的研究也少。随着科学技术的发展和研究方法的不断完善，人们对这一类群的认识也愈来愈深入，其种类、区系与动物地理学等方面的特点正逐渐为研究者所揭示。其中有些种类由于在海洋生态学、环境生物学和渔业生产上具有重要意义而吸引着许多鱼类学家和生态学家的注意和对其进行研究(Kotrschal，1992；Springer，1993；Stepien，1993)。 印度-西太平洋是鳚亚目鱼类种类最多的海区之一，中国及周边国家和地区在此领域已有一定的研究基础。日本学者Masuda等(1984)总结了日本沿岸鳚亚目鱼类有86属212种，菲律宾已知有36属80余种(Herre，1953)。中国是世界上海岸线最长的国家之一，适合于鳚亚目鱼类栖息的生境相当广泛，种类也相当丰富。作者根据目前已掌握的标本和文献资料，经初步分析得出中国海区现有鳚亚目鱼类33属78种。  相似文献   

The Continuous Plankton Recorder: concepts and history, from Plankton Indicator to undulating recorders   总被引：1，自引：0，他引：1  

P. C. Reid  J. M. Colebrook  J. B. L. Matthews  J. Aiken  Continuous Plankton Recorder Team 《Progress in Oceanography》2003,58(2-4):117

Alister Hardy conceived the Continuous Plankton Recorder (CPR) survey in the 1920s as a means of mapping near-surface plankton in space and time, interpreting the changing fortunes of the fisheries and relating plankton changes to hydrometeorology and climatic change. The seed he planted has grown to become the most extensive long-term survey of marine organisms in the world and the breadth of his vision becomes ever more apparent. The survey has now run for over 70 years and its value increases with every passing decade. Operating from ‘ships of opportunity’ the machines used are robust, reliable and easy to handle. Wherever possible, all the sampling and analytical methods have not been changed to maintain the consistency of the time series. Computerisation and the development of new statistical approaches have increased our ability to handle the large quantities of information generated and enhance the sensitivity of the data analyses. This overview, based on almost 900 papers, recounts the various phases in the history of the survey. It starts with the Indicator Survey (1921–1934), the deployment of the first CPR on the Discovery Expedition (1924–1927) and the early CPR survey in the North Sea (1931–1939). The survey reopened in 1946 after the Second World War and expanded across the North Atlantic to North America from 1959. Taxonomic studies were initiated and an emphasis was placed on patterns of distribution, which were seen to reflect the varying oceanographic conditions. The years 1968–1976 saw further expansion with operations even in the American Great Lakes, publication of a Plankton Atlas and initial evidence for a downward trend in plankton biomass. At about this time electronic instrumentation was attached to CPRs to make additional measurements and work was started on the development of a new generation of undulating Continuous Plankton and Environmental Recorders (CPERs). In 1976 the survey moved to Plymouth. Scientific priorities in the UK changed in the subsequent decade and funding became more difficult to secure even though some of the CPR papers being published at the time are now regarded as classics in plankton ecology. In 1988 the UK Natural Environment Research Council (NERC) decided to close the survey. An international rescue operation led to the creation of the Sir Alister Hardy Foundation for Ocean Science (SAHFOS) in 1990, which has continued with consortium funding from a number of countries, and from 1999 again included NERC. The scientific rationale of the survey has gained credibility as concern over climate change and other anthropogenic effects has grown and as the key role that plankton plays as an indicator of large-scale environmental conditions becomes ever more apparent. Recently, the survey became an integral component of the Global Ocean Observation System (GOOS) and expanded into the North Pacific. It plays a complementary role in many large international and multidisciplinary projects and is providing inspiration, advice and support to daughter surveys elsewhere in the world. At the start of a new millennium, Hardy’s vision from the 1920s is a powerful driving force not just in international biological oceanography, but in global environmental science.  相似文献   

南黄海表层沉积物中氮的区域地球化学特征   总被引：5，自引：0，他引：5  

吕晓霞  宋金明 《海洋科学进展》2003,21(2):174-180

通过分级浸取分离的方法获得了南黄海表层沉积物不同形态的氮，首次探讨其分布的区域性特征：南黄海表层沉积物中各形态氮在不同测线上均呈现出波状分布。B测线的基本上呈现出中部海域高，两边海域低，而西部海域又略高于东部海域的趋势，D和E测线的基本上呈现出西高、东低的趋势，C测线的则呈现出西低、东高的趋势，F测线的变化趋势比较平缓，从整体上看，SOEF—N和TN的分布呈现出西部海区比东部海区低的趋势。受各测线上沉积物种类差异的影响，自北向南各形态氮的变化幅度逐渐减小，其中SOEF-N在各测线上的变化幅度最大，且自北向南降幅最大。受水动力及沉积物粒度的影响，不同形态氮在黄海槽内各站位沉积物中的含量较高。沉积物中各形态氮在不同测线上的分布还表明，陆源输入对南黄海沉积物中氮测线分布有较小的影响，海洋自生氮对南黄海表层沉积物中氮的形态、含量与分布具有重要影响。  相似文献