最新刊期
期 11 ， 1976
- 摘要：Hydrographic investigations in the East China Sea ( abbreviated as ECS hereafter) carried on by China, Japan and other coun ries in the last two decades are briefly reviewed, current structures and eddy charae eristics in ECS are elucidated, and viewpoints to the important problem concerning the current patterns in ECS are suggested.关键词：CURRENT STRUCTURES;EDDY CHARACTERISTICS
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发布时间：2023-04-28 - 摘要：A cyclonic mesoscale eddy located about 150 km southwest of Cheju Islanl, the scales of which are 100-200 km horizontally and 50 m vertically, is reexamined with current measurements. The year round and multiyear existence of the eddy has been identified with thermal structure and current measurements. Interannual flucturation of the eddy in summer is discussed in somewhat detail in terms of closed isotherms at various levels. The observed current data in 1972’s summer agree well with computed geostrophic flow, i.e. they both show the existence of the cyclonic eddy with cold and saline water in the central area. It is reasoned that the formation of the eddy is closely correlated to the interaction of the Yellow Sea Warm Current, Yellow Sea Coastal Current and the northward residual of Kuroshio, and the Changjiang Dilutel Water may also play an important role in summer.. It is important to note that position and dimension of a distinct circular-shaped region of c1ayey mud is surprisingly coincident with those of this eddy.关键词：CYCLONIC EDDY
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发布时间：2023-04-28 - 摘要：Based on the analysis of 30 storm surge processes (1952-1974) along the Fujian and Guangdong coastal area, it can be seen that there are differences among the typhoon surges owing to the various tracks of typhoon. The landfalling typhoon is the main track bringing about disasters. The typhoon, moving parallel to the coast or in the distance，generally may not produce heavy surge. A typhoon surge by no means rises or falls steadily in the entire process, some associated oscillations with various periods superimpose on the surge and drastically develops with the forced wave. An entire process of a typhoon surge may last 3-5 days, the larger the scale of typhoon and the lower its speed, the 1onger the duration of the surge. As concerns the landfalling typhoon, the occurrence time of peak surge of each station which lies on the right side of the moving direction of typhoon lags from the north to the south, like a wave traveling from the north to the south. According to the preliminary analysis, the main wave of the typhoon surge in the Strait has some character1stics of tidal wave, however, a serial inertiogravitational waves may be generated out off the Strait, particularlly under the topographic effect of the East China Sea, the typhoon morving northward along the coastline may lead to the generation of the ''edge wave”. Due to the interaction between surge and astronomical tide, the surge curves shows an evident tidal oscillation. Here, the relationship between the speed of typhoon and surges as well as the correlation diagram between the occurrence time of peak surge and speed of typhoon and distance are given. Finally, the effect of the meteorological factors of single station on the typhoon surges are discussed, the empirical forecasting equations are presented. In addition, the feasible range and practical results of the equations are analyzed.关键词：TYPHOON SURGES
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发布时间：2023-04-28 - 摘要：In the south-east of the Southern Yellow Sea., there is often a strong intrusion water with higher temperature and salinity originated from Tsushima Current. It is named at the present the Southern Yellow Sea Warm Current Water. Using the data from National Oceanographic Bureau of China and Fisheries Research and Development Agency of the Republic of Korea for years 1976-1979, the authors obtained the average December temperature-salinity of the body of the Southern Yellow Sea Warm Current Water, its seasonal changes, and its year by year variance. The results of its T-S Diagram analysis are presented.关键词：TEMPERATURE AND SALINITY;THE SOUTHERN YELLOW SEA WARM CURRENT WATER
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发布时间：2023-04-28 - 摘要：In summer a?high salinity Cold Wate Body, sometimes in the form of a cold water ring，appears at the upper water layer near the Southern Yellow Sea Warm Current Water.It measures about 90 km east-west and about 166 km south-north. In this paper the observational data for the years 1976-1979 obtained by China and Korea，and the “Oceanographical Charts of the Adjacent Seas of Ty?sen” for the years 1934-1938are used. Its monthly, yearly changes and its circulation are analysed and discussed. The result of the dynamic calculation shows that the Co1d Water Body is accompanied by a closed counterclockwise density circulation. At the end of the paper a suggestion on the cause for the formation of the Cold Water Body is presented. It may 1be a cut-off phenomenon of the cold water mass near the Southern Yellow Sea Warm Current Water.关键词：COLD WATER BODY;THE SOUTHERN YELLOW SEA WARM CURRENT WATER
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发布时间：2023-04-28 - 摘要：It is one of the current worldwide interest to explore new energy source from the ocean. More recently, emphasis has been placed on offshore high energy envirommental survey: The authors have made a preliminary study hased on site observation in the immediate proximity of the Chengshan Cape, Shandong. This paper attempts to discuss 1) the construction of current in the immediate proximity of the Chengshan Cape, and 2) the statistics of the measured current velocity. We have also found that a couple of cells seem to occur on the north side of the immediate proximity of the Chengshran Cape,and that “ear-shaped” region may be uncontinuous on the east side.
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发布时间：2023-04-28 - 摘要：Based on the GEK data obtained by JMA at six sections in twenty-eight years (1956-1983), seasonal and interannual variations of Kuroshio in the East China Sea are analyzed. The main results are as follows.关键词：VARIATIONS OF THE KUROSHIO
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发布时间：2023-04-28 - 摘要：In the present paper, vertical thermohaline structure and its relation to currents in the Southern Yellow Sea are addressed, based on the temperature and salinity observations with Neil Brown Mark-III CTD and the current measurments from the bouys deployed in November, 1983. The thermohaline structure，which were firstly found in 1983，can be classified into these categories: (1) step structure caused by double diffusion, (2) double halocline structure., (3) temperature-inversion structure. Both the secondary halocline layer ?and temperature inversion layer were located in the Yellow Sea Cold Water at about the same depth, which suggests the existance of the Yellow Sea Warm Current.It appears that the Yellow Sea Warm Current, as a compensation current, flows into the central Southern Yellow Sea from west of Cheju Island in the bottom layer.关键词：VERTICAL THERMOHALINE STRUCTURE;CURRENTS
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发布时间：2023-04-28 - 摘要：Features of distrilbution of transmission and their relation to front, tidal current and circulation in the Southern Yellow Sea in late autumn, 1983 are described. It has been found from observations that the distribution of transmission is very different on the two sides of the front of the Cold Water Mass of Yellow Sea, and that the transmission is higher in the upper layer in the Gold Water Mass area and lower in the bottom layer where isoplethes appear to be horizontal and related to quasimaximum tidal current. In contrast，transmission outside the front of Cold Water Mass is also lower and homogeneous vertically. The Water in the area where tidal mixing is strong is more turbid. It seems that diffusion of suspended matter is restrained by thermocline. Main currents such as the Warm Current and Coastal Current of Yellow Sea，and northward residual of the Taiwan Warm Current etc.can be easily identified from transmission distribution.关键词：TRANSMISSION;CIRCULATION
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发布时间：2023-04-28 - 摘要：In this paper，vertical structure of dissolved oxygen in. Cold Water region of Southern Yellow Sea is examined in terms of dissolved oxygen data gathered with Neil Brown Mark-III CTD November 1983.
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发布时间：2023-04-28 - 摘要：Total dissolved chromium, particulate chromium, hexavalent chromium and chromium of aerosols in the Changjang River and its estuarine area have been determined by f1ameless atomic absorption. spectrophotometry. Investigation results indicate that content of total dissolved chromium is below 0.2 μg/L in the lower reaches of the Changjiang River, reaching the highest 1.18 μg/L in the estuary, and between 0.1 and 0.5 μg/L in the estuarine region. Hexavalent chromium is the principal speciation in river water. Trivalent chromium is the dominant speciation in estuarine water. Content of total chromium in Changjiang River and estuary is between 0.98-12.3 μg/L. Ratio of particulate chromium to tota1 chromium is over 80%, major ratio is more than 95%. So particulate chromium in Changjiang River and estuary have been considered the most principal speciation of existing chromium. Under the physical and chemical condition of the estuary, hexavalent chromium in sea water is reduced to trivalent chromium by organic matter, and trivalent chromium is adsorbed by suspended matter, resulting in particulate chromium and transport. of chromium speciation. Chromium content in aerosols also reflected the influence of pollution source, since chromium content in aerosols can affect chromium distribution in surface sea water.关键词：CHROMIUM
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发布时间：2023-04-28 - 摘要：During 1951-1980, the annual average amount of sediment loads discharged from the Huanghe River is 1069×106 t/a, which accounts for around 80% of the total sediment load emptied into the Bohai sea and Yellow Sea from rivers except the Changjiang River. It shows that sediment loads discharged from the Huanghe River play the most important role in the sedimentation in this area. However, intensities of their influences were different at different places. About 70% of the total sediment loads from the Huanghe River settled down at the mouth and nearby area and the rest spread toward the sea under influence of the tidal current and wave. In the investigation area, characteristic of sedimentation is unequilibrium, which led different sediments formed at different time to distribut on sea bottom. Sediment loads discharged from the Huanghe River were predominantly loess with abundant CaCO3, which can be used to distinguish their dispersion range and intensity. Their mineral assemblage further indicate the influence of the sediment loads derived from the old and the present Huanghe River. Investigation indicates that the influence of sediment loads derived from the Huanghe River on the Bohai Bay and on the center of the Bohai Sea is stronger than on the Laizhou Bay. The spatial distribution of suspended matte:r, which indicates the transport processes of sediment loads discharged from river, has proved this conclusion. The annually average amount of sediment emptied into the Yellow Sea through the Bohai Strait is estimated to be about 5-10 million tons. Most of that was transported round the Chengshan Cape to the west along the south coast of the Shandong Peninsula to the Laoshan Bay. A small part of that was dispersed to the center of the Yellow Sea and deposited together with sediments derived from other sources forming fine grain sediment there, and the rest was tranported to the East China Sea.
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发布时间：2023-04-28 - 摘要：This paper presents the results of a paleomagnetic study of eight sediment cores from the Changjiang Delta. A total of 851 samples were measured. The results of paleomagnetic measurements are combined with the results of the measurements of the C14age, which may be correlated with the geomagnetic polarity reversal scales of Cox (1969) back to about 4.5 million years ago. We have established the geomagnetic polarity reversal scales of the sediment cores in this region, ascertained the depth range of the polarity epoch and events, calculated sedimentation velocity among them and differentiated the Quaternary strata. The depths from the Brunhes normal polarity epoch to the Matuyama reversal polarity epoch are between 65-248 m, from the Matuyama reversal polarity epoch to the Gauss normal polarity epoch are between84-321 m. We have taken the Mammoth event in Gauss normal polarity epoch ,for the bottom of the Quaternary.The iresu1ts of the calculation of the sedimentation velocities show that their velocities increased gradually from the Early Pleistonece to the Holocene.关键词：PALEOMAGNETIC;SEDIMENT CORES;CHANGJIANG DELTA
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发布时间：2023-04-28 - 摘要：This paper presents the results of marine benthos research carried out in the East China. Sea, TheYellow Sea and the Bohai Sea dμring the recent by the Institute of Oceanology, Academia Sinica. The East China Sea covers a wide shallow water area which is less than160 meters deep with only a small part exceeding 200 meters and an average depth of 370 meters. The Yellow Sea is more shallow, averaging 44 meters in depth. The average depth of Bohai Sea is 18 meters only. Influence of the continental climatic changes and interaction?of the Kuroshio Warm Current, the Taiwan Warm Current，the East China Sea .and Huanghai Sea Coastal Currents, the Changjiang (Yangtze) River and Huanghe (Yellow) River diluted water and the Yellow Sea. Cold Water Mass result in very complicated oceanographic conditions. Benthic faunas of the above mentioned areas are therefore also very complex in species composition, quantitative distribution and community structure, etc. In this paper special references are given to the relationship between the organisms and the physical oceanographic features, as well as between organisms and the sedimentation. According to the distribution Pattern and the ecological characteristics，the macrobenthos inhabiting these waters may be .distinguished into three main ecological groups.
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发布时间：2023-04-28 - 摘要：From the benthos samples obtained during three cruises under the "China-US Joint Study Program of Marine Sedimentation Process”in the Changjiang Estuary and adjacent waters in 1980-1981, it is noted that polychaetes are very abundant in species and average about 65% of the total benthic population. The distribution of biomass and density is extremely uneven. The number of individuals in the upper 10 cm layer of sediment is very abundant and average about 66% of the total number of polychaetes in the sediment column, but it decreases with the increase in depth of the sediment. This paper mainly presents the results of analysis of the materials collected during the first cruise, emphasis being given to the presentation of data on species ?composition, distribution of biomass and density, vertical distribution and the relationship?between the distribution of' polychaetes and the sedimentary environment.关键词：POLYCHAETES;CHANGJIANG ESTUARY AND ADJACENT WATERS
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发布时间：2023-04-28 - 摘要：This article presents results from the joint China-US investigations of the sediment dynamics of the East China Sea conducted during 1980 and 1981. Generalized distribution patterns of benthos are briefly described, however particular emphasis is placed on observations of the vertical distribution of macrobenthos in the sediment column and deductions on the role of benthic organisms in sedimentary processes.关键词：MACROBENTHO;BIOGENIC STRUCTURES
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发布时间：2023-04-28 - 摘要：This article presents the results of preliminary quantitative analyses of meiobenthic copepod and kinorhynch assemblages sampled during August and November, 1981 cruises of the China-US Joint Study of Marine Sedimentation Processes in the Changjiang Estuary and adjacen waters. The results show that the density of each group is simi1ar to reported values from equivalent water depths worldwide. Copepods averaged 75.2 and kinorhynchs 26.3 per 10 cm2 over all East China Sea collections. The distribution of these two groups of meiofauna is closely related to the hydrodynamic corditions and sedimentary characteristics in the region. The species diversity (H’) and evenness (J’) in deeper continental shelf waters east of 124°E are higher, their mean values being 2.5 and 0.9 respectively, and the number of species here is also high with an average of 15.9 species per core. In the shallow water area of the Changjiang Delta, the diversity, evenness and number of species are lower, being 1.8, 0.8 and 9.3 respectively. Members of a shallow water species group occur almost exclusively in the Changjiang Delta，area，while those of deeper water species groups are mostly distributed in the continental shelf area east of 124°E and occasionally are found at deltaic sites. Members of a cosmopolitan species group are found throughout the region investigated.关键词：MEIOBENTHIC COPEPODA;KINORHYNCHA
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发布时间：2023-04-28 - 摘要：This paper deals with eight species of digenetic trematodes from fishes collected along the coast of the East China Sea. The eight species belong to three different families, namely Opistholebetidae, Lepocreadiidae, and Cryptogonimidae. Three species, Neoallolepidapedon hawaiiense Yamaguti，1965, Cephalolepidapedon seba Yamaguti, 1970, and Sphincterostoma japonicus Yamaguti, 1937 are new records for China, and five species are new to science. The type specimens are deposited in the Institute of Oceanology, Academia Sinica. All the measurements are in millimeters, except those of the ova which are in micrometers.关键词：DIGENETIC TREMATODES
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发布时间：2023-04-28 - 摘要：The“trimodal distribution'' of the Changjiang Diluted Water (CDW) in June, 1980 is analyzed and some dynamical aspects of its path are discussed in this paper. The main results are as follows:(1) The “ trimodal distribution”of the CDW may be caused by the interaction of large discharge of Changjiang River, strong tidal currents and mean alongshelf currents (the “ East China Sea Coastal Current ” and the “ Tai wan Warm Current”) within the estuary and over the adjacent shelf and the complex inner shelf topography. (2) The large discharge, the rapid cross-shelf increase in depth and the relic river valley in studied area have a direct influence on the behaviour of the path of the CDW (3) A simple estimation shows that the mean alongshelf current，general1y speaking，may have a limited influence on the path of the CDW.关键词：THE PATH OF THE CHANGJIANG DILUTED WATER
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发布时间：2023-04-28
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