Sea Levels and Western Boundary Flow Near a Tectonic Zone in the Northern Pacific     

Shigehisa Nakamura 《Marine Geodesy》2001,24(1):27-33

This article concerns an interrelation between the sea levels and the western boundary flow near a tectonic boundary in a local zone in the Northwestern Pacific. In this zone, sea level variations at stations located on the coast facing the Pacific are studied to find the interrelation between variations of the Kurosio flow as an index of the distance of the flow axis off a specific coast. The result is discussed after data processing of the monthly means of the sea levels, and a notice is taken of variations caused by active crustal upheavals during a seismic event, a local earthquake.  相似文献   

Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska   总被引：1，自引：0，他引：1  

Lang  Geoffrey M.; Brodeur  Richard D.; Napp  Jeffrey M.; Schabetsberger  Robert 《ICES Journal of Marine Science》2000,57(2):265-271

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Progress in Seto Inland Sea Research     

Hidetaka Takeoka 《Journal of Oceanography》2002,58(1):93-107

The Seto Inland Sea is a representative coastal sea in Japan with a complicated geometry and thus a variety of marine environments. This sea is, at the same time, one of the most industrialized areas in Japan, and its marine environment has been significantly affected by the anthropogenic impacts over the last four decades. The wide range of marine environments in this sea and the serious environmental issues resulting from these impacts have attracted the attention of Japanese coastal oceanographers. It is believed that the nature and scope of these studies might be an example of the progress of Japanese coastal oceanography. The historical changes in the Seto Inland Sea environment in the last four decades are briefly summarized, and the progress in the studies of the Seto Inland Sea is reviewed with reference to historical changes. Some recent research topics and activities are also mentioned. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

New Determinations of the Ages of Tide in the North Atlantic Ocean     

E. Gil  C. de Toro 《Marine Geodesy》2005,28(3):231-249

Ages of tide provide relevant information about the spatial distribution of existing anomalies in the normal modes of the oceans, because a delay may be associated with bottom friction energy dissipation, closely located resonances, bathymetric gradients, or radiational effects. The determination of other parameters, such as the age of diurnal tide or age of parallax, also provide further knowledge about the ocean's hydrodynamical response to acting forces. Following the development of new ocean models and the availability of a greater amount of data, these parameters can be redetermined. We present the spatial distribution of these parameters in the Northeast Atlantic Ocean and the Mediterranean Sea, obtained from 507 stations. The results are discussed in terms of bathymetric models, coastal features, sea surface temperature, wind and other environmental factors.  相似文献   

Some oceanographic features of northeastern Atlantic waters west of Ireland     

McMahon  T.; Raine  R.; Titov  O.; Boychuk  S. 《ICES Journal of Marine Science》1995,52(2):221-232

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长江河口盐水入侵锋研究   总被引：14，自引：4，他引：14  

茅志昌 《海洋与湖沼》1995,26(6):643-649

根据１９５９－１９８８年部分年份长江口南港南槽、南港－北槽－北港和北支共２２个纵向测次资料，计算分析各入海通道向盐水入侵锋的伸退区域及其特征。利用密度佛氏数Ｆ＇ｘ的计算结果，提出确定盐度锋迁移范围和滞流点的判据。研究结果表明，盐度锋对河口量大浑浊带主要有两大贡献：锋区含盐有利于泥沙絮凝；锋面附近形成的重力环流，有利于泥沙富集，形成最大浑浊带。  相似文献   

Oceanic crust thickens approaching the Clipperton Fracture Zone     

G. A. Barth 《Marine Geophysical Researches》1994,16(1):51-64

A multi-channel seismic reflection image shows the reflection Moho dipping toward the Clipperton Fracture Zone in crust 1.4 my old. This seismic line crosses the fracture zone at its eastern intersection with the East Pacific Rise. The seismic observations are made in travel time, not depth. To establish constraints on crustal structure despite the absence of direct velocity determinations in this region, the possible effects of temperature, tectonism, and anomalous lithospheric structure have been considered. Conductive, advective, and frictional heating of the old crust proximal to the ridge-transform intersection can explain <20% of the observed travel-time increase. Heating has a negligible effect on crustal seismic velocity beyond ~10 km from the ridge tip. The transform tectonized zone extends only 6 km from the ridge tip. Serpentinization is unlikely to have thickened the seafloor-to-reflection Moho section in this case. It is concluded that, contrary to conventional wisdom, the 1.4 my old Cocos Plate crust thickens approaching the eastern Clipperton Ridge-Transform Intersection. Increase in thickness must be at least 0.9 km between 22 and 3 km from the fracture zone.  相似文献   

东海海洋锋分类的初步探讨     

汤毓祥 《海洋科学进展》1995,(2)

基于笔者近年来对海洋锋的研究（１９９０；１９９２；１９９５）［１，５～７］，本文初次探讨了东海海洋锋的分类问题。同时，对各类海洋锋的海洋学特征及其形成机理做了分析比较。并给出了各种海洋锋的垂直结构模式图。  相似文献   

基于SWOT分析的黄渤海海洋气象 现代化协同发展研究          下载免费PDF全文

运顺利  王炜  王钦良  刘丽丽  李宁 《海洋开发与管理》2018,35(2):86-90

文章在气象现代化建设和协同理论研究的背景下,基于对黄渤海海洋气象现代化的优势、劣势、机会和威胁的分析(SWOT分析),利用"新五力模型"研究黄渤海海洋气象现代化协同发展机制。研究表明,黄渤海海洋气象现代化的优势主要包括海洋气象观测系统、海洋气象预警预报信息发布和建立海洋气象中心,劣势主要包括海洋气象立体观测能力不足、精准海洋气象技术发展不足和海洋气象工作协同发展不足,机会主要包括"一带一路"建设、新技术发展和新型气象灾害预警系统建设,威胁主要包括主要影响天气系统、重要致灾因子和潜在的社会竞争;应充分有效利用吸引力、凝聚力、辐射力、排斥力和亲和力5种作用力的不同功能和组合创新,促进黄渤海海洋气象现代化协同发展。  相似文献   

结合有人和无人驾驶船观测以及长期定点观测计算寒潮过境引起的海水输运     

WEEKS Eddie  ROBINSON Mark E  李春雁 《海洋学报(英文版)》2018,37(11):1-7

高分辨率的数据对于理解近海的复杂过程以及制定有效的管理措施日益重要，特别是考虑到恶劣气象的长期效应。这种长期效应的积累可以与潮汐的长期效应一样重要。本文讨论的即是一个大气锋面过境的过程对于Vermilion Bay水输运的影响。我们的研究采用了有人船和自制的无人船作为载具来测量流速剖面。这种自制无人船造价低廉、简单实用、可控性好，可以做比有人船更精确的测量。我们采用安装在这些观测载具上的多普勒流速剖面仪在一个潮周期内反复对流速的横向和垂向断面的水通量做高分辨率的精准测量，然后与一个定点的多普勒流速剖面仪的流速做相关分析得出相关系数。利用所求相关系数把水通量的计算扩展到总共717天的定点观测时间段，以此讨论在这个期间最强的一次大气寒潮过境时产生的水输运并阐述此类过程的重要性。  相似文献