最新刊期
期 11 ， 1976
- 摘要：The seasonal changes of the mean 10-day sea surface temperature in the East China Sea for the years 1953-1972 were studied by applying the singular-value decomposition technique. Main results obtained are as follows: In the singular-vector analysis of the mean 10-day sea surface temperature. in the East China Sea, the first three singular-vectors (or seasonal march vectors) account for 97.76% of the variance of the data. The geographical distribution in the weightings (or spatial pattern vectors) on these vectors indicates a markedly regional organization. An objective classification of the surface water mass in the East China Sea was provided by its seasonal temperature change pattern. It may be safely said that the singular-value decomposition technique may be used much more extensively in oceanographic investigations.关键词：THE MEAN SEA SURFACE TEMPERATURE;OBJECTIVE ANALYSIS;SINGULAR-VALUE DECOMPOSITION TECHNIQUE
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发布时间：2023-04-28 - 摘要：Starting from the modern descriptive statistics, which means a technigue for collecting, summarizing and analysing data, the authors investigated the statistical characteristics of the measured current velocities in the mid-province of the continental shelf.By statistically analyzing the measured current velocities for a period of 2-15 daynight cycles in summer, the following main results are obtained: (1) the logarithmic current speed distribution curves for the Mid-privince of the continental shelf, as well as for the Deep-sea and Ocean, approximate to a normal distribution; and (2) all of the fluctuation energy of the measured current velocities at all levles in our stations was mainly concentrated within circular frequency (10-3-10-4)see-1.关键词：MEASURED CURRENT VELOCITIES;STATISTICAL RESEARCH;THE MID-PROVINCE OF THE CONTINENTAL SHELF
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发布时间：2023-04-28 - 摘要：In this paper the methods of spectral analysis for current vector time series are introduced briefly, and applying the FFT method, the spectra of u, v components and rotary spectra are calculated for current vector time series observed by a mooring buoy in the shallow water off coast of Qingdao. In this analysis the time series of residual currents are given by 25-hour-running average method. It is shown that the residual currents respond to winds quikly from surface to bottom in the observed region,furthermore, the 1/6, 1/8, 1/10, c.p.d constituents of the shallow water tide currents are significant besides the 1/2 and I c.p.d ones.关键词：SPECTRAL ANALYSIS;MOORING BUOY
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发布时间：2023-04-28 - 摘要：In this paper, characteristies of frontal surface and vertical struetural types of temperature and salinity in the northwestern part(28°-32°N, west to 124°E) of the East China Sea are preliminarily analysed using data observed 1958-1965 and 1971-1974. It was found that there are two front surfaces, one on the eastern side and the other on the western side of the area. based on the characteristics of the curves of temperature and salinity versus latitudinal distance and on the principle to give more attention to salinity than temperature. The western front surface is located between 122°10′E and 122°40′E, and comparatively steady at all times of the year, with only a few periodical (semi-diurnal tidal cycle) perturbation owing to the tidal influences.Eastern front surface position and its salinity show clear seasonal variation on account of the influences of the Changjiang (Yangtze) runoff at the surface, and the clear effect of the Taiwan Warm Current on the deeper layer. The vertical structure of temperature are divided into five types in this region:vertical homogeneous type, positive gradient type, negative gradient type, intermediate warm water type and intermediate cold water type. While the vertical structure of salinity are divided into only two types: the vertical homogeneous type and the positive gradient type. The above-mentioned vertical structural types of temperature and salinity appear alternatively in a year. Vertical homogeneous type was almost distributed all over the area for half a year of cold weather. The negative gradient type temperature and the positive gradient type of salinity occured mainly in the warm weather for half a year.关键词：THE STRUCTURE OF TEMPERATURE AND SALINITY;THE NORTHWESTERN PART OF THE EAST CHINA SEA
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发布时间：2023-04-28 -
A PRELIMINARY ANALYSIS OF THE INTERMEDIATE COLD WATER IN THE NORTHWESTERN PART OF THE EAST CHINA SEA
摘要：In this paper, using geographic analytical method, characteristics of intermediate cold water formed in the northwestern part of the East China Sea and its cause are analysed preliminarily, based on data observed during 1958-1965. Some preliminary results are obtained as follows：- 78
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发布时间：2023-04-28 - 摘要：In summer there is a cold water mass located at the depth from the thermocline to the bottom southwest of the Cheju Island on the northern shelf in the East China Sea. This paper names it “the Northern Bottom Cold Water Mass in the East China Sea”(simply called the “Northern Bottom Water”in the following). Using the data of 1963-1977, the authors obtained some results,such as the distribution of the Northern Bottom Water and the processes of its occurrenee, formation and disappearance, and also discussed its central position at section 32°N, its east and west boundary，and its spreading area. Besides, the cause that led to the formation of the Northern Bottom Water was also analyzed. It was primarily concluded that the Northern Bottom Water was the same water left over from winter without obvious increase of temperature. The density circulation of the Northern Bottom Water was briefly discussed,which showed that there was a weak anticlockwise cireulation at its upper layer in June, 1976, but a clockwise cireulation to the southwest.关键词：THE BOTTOM COLD WATER MASS;THE NORTHERN SHELF IN THE EAST CHINA SEA
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发布时间：2023-04-28 - 摘要：On basis of the analysis of the temperature and salinity data observed in July-August, 1972 and some historic data of the temperature and the salinity, the authors found that there was frequently an isolated cold water mass at the middle and upper water layers in the northern part of the East China Sea (SW of Cheju Island) in summer. After comparing the phenomenon with the residual current data observed in this region, the authors pointed out that there was a cyclonic eddy in this region. It is shown from calculation and analysis that the horizontal extent of the upper portion of the eddy is small, but that of the lower portion large.Its average horizontal scale is about 90 miles,the average velocity of upwelling at its center approximately equals to 4.3×10-3cm/sec. The authors suggested that this cyclonic eddy seems to be a small secondary circulation of the anticlockwise circulation in the Yellow Sea and the East China Sea.Its formation is closely related to the topography of the bottom of this region, the appearance of cold water from lower layers in summer and the shear effect of two current systems of the Yellow Sea Warm Current and Coastal Current of the Yellow Sea.关键词：CYCLONIC EDDY;NORTHERN EAST CHINA SEA;IN SUMMER
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发布时间：2023-04-28 - 摘要：In the present paper the cause and dynamical structure of the coastal upwelling taking place off Zhejiang Province is discussed. The section distribution of water temperature measured in the area is a clear evidence of the existence of upwelling.To verify whether the upwelling here is mainly caused by the northward branch of the Kuroshio or by wind, the vertical velocities of the two are calculated separately,from data on both bottom currents and wind stresses collected in June-july of 1959 and 1963 respectively. The vertical velocity computed from current measurements near the bottom is one order larger than computed from wind stress. That means, in summer time, the major component of upwelling off Zhejiang Porvince is “nonwind-driven”. In order to show the numerical relationship between the intensity of the coastal upwelling in the area and of the northward branch of the Kuroshio, the correlation analysis is made between the temperature and the salinity on the basis of data of six summers. A new method to calculate vertieal velocity of water is suggested in the paper.
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发布时间：2023-04-28 -
A PRELIMINARY STUDY ON THE T-S CHARACTERISTICS AND THE ORIGIN OF TAIWAN WARM CURRENT WATER IN SUMMER
摘要：In this paper, the characteristics of temperature and salinity of Taiwan Warm Current Water in summer was analyged in detail, based on the data observed for twenty years(1958-1977) and the T-S analysis method; the origin of which was discussed too. Some new ideas different from those of predecessors were proposed. Its major topics are as follows:- 81
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发布时间：2023-04-28 - 摘要：In this article, using tidal differential equation, the gradients of the tidal levels were calculated with the data of tidal current in the sea；and then the tides in the sea have also been predicted by means of the tidal data at the coastal station. Simultaneously, the quasi-maximum velocity of tidal current, the energy imported into the East China sea by the sum of the M2 and S2 of the main semidiurnal constituent and its dissipation have been caleulated. In addition, the tide and tidal current properties,the propagation of the tide waves, quasi-maximum velocity of tidal current and the transport of the tidal energy have also been discussed.
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发布时间：2023-04-28 - 摘要：By means of Doodson's standard method, the tidal prediction was made at 19 tide stations along the coast of China. The spectra of the sea level and the residual spectra were computed by Fast Fourier Transform method, furthermore, the residual (subtraction of the tidal prediction from the observation )and its speetrum strueture were also analysed. the main results are as follows:关键词：TIDE RESIDUAL SPECTRA;THE YELLOW SEA;EAST CHINA SEA
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发布时间：2023-04-28 - 摘要：The numerical computions of tidal differential equations for Jiaozhou Bay are carried out using Flather and Heaps's scheme. The results are satisfactory compared with the observations. The computations show that the shoaling region has much more important influence on the solution than the non-linear advective terms have in Jiaozhou Bay, where the intertidal zone accounts about a quarter of the total area.
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发布时间：2023-04-28 - 摘要：In this article, some statistical analysis of temperature and salinity of the Kuroshio Watermass. in the East China Sea was made, the seasonal and annual averages were ealculated for the whole region, north and south of 30°N, respectively. Furthermore,the curve of probability distribution was used, the charaeteristics of temperature and salinity of the"original water type ”are determined.关键词：TEMPERATURE;SALINITY;THE KUROSHIO WATERMASS
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发布时间：2023-04-28 - 摘要：According to the shape of T-S curves, the Kuroshio Watermass of the East China Sea in the region studied in the summer time can be divided into four layers, i.e. four watermasses: (1)the Kuroshio Surface Water, (2)the Kuroshio High-salinity Water,(3) the Subarctic Intermediate Water, and(4)the Okinawa Trough Deep Water,However, in winter, only three watermasses exist, that is to say, the Kuroshio Surface Water is absent. The Kuroshio Surface Water is a mixed water of the Continental Water and the Kuroshio High-salinity Water. It is situated on the west side of the Kuroshio High-Salinity Water. It starts to appear in the region studied in May, most powerful in August, and disappears from this region after November. The maximum thickness is generally less than 75 meters in summer. The Kuroshio High-Salinity Water is the core of the Kuroshio Watermass. it consists mainly of the North Subtropical Water, with a salinity ranging about 34.50-35.02%. This watermass is situated above the 500 metre level. There is a High-Salinity core in this layer, the salinity of which being higher than that of the water upper and lower layers. The depth of the core is generally about 150-200 metres;however in winter, in the north and west of this region the core is sometimes located at sea surface. The main body of the Subarctic Inter mediate Water is the North Pacific Intermediate Water formed in the Subarctic region. The upper and lower boundaries of this watermass are situated at depths about 400-500 and 900-1000 metres respectively. There is a core of low-salinity of about 34.32% in the water. The Okinawa Trough Deep Water originates in the North Pacific Ocean where it is located between 1000 and 1200 metres, but below 1200 metres in this region.关键词：THE KUROSHIO WATERMASS;EAST CHINA SEA
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发布时间：2023-04-28 - 摘要：The paper quasi-quantitatively analysed the characteristies of seasonal variation of mean sea surface temperature (SST) in the kuroshio region and its physical processes. This study showed that not only the heat budget through the sea surface was possessed of an important influence for variation of SST, but also advectional heat transfer, and horizontal diffusions inter water cann't be neglected. The order of magnitude of heat transfer term was estimated respectively. Based on mentioned above the relationship between the asymmetrical variation of SST and atmospheric circulation was discussed. From the results of the above relationship, the atmospheric circulation in winter had significant effect on the asymmetrical variation of SST.关键词：SEASONAL VARIATION;MEAN SEA SURFACE TEMPERATURE;RESPONSE TO ATMOSPHERIC CIRCULATION
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发布时间：2023-04-28 - 摘要：Using data accumulated for 24 years, the general investigation has been made on the correlation of sea surface temperature in Kuroshio region and previous northern hemisphere 500 mb high field. By analyzing previous atmospheric circulation in relation to sea surface temperature in Kuroshio, it is pointed out that effect is apparent in winter, spring and antumn, but less in summer.On this basis,taking eight optimum correlation points, fitting equation was built up monthly by means of stage regression. The forecast for 22 months has been made by this method. The result of which showed that each month is approaching to the fact except June, July,August and September.
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发布时间：2023-04-28 - 摘要：Data used in this paper are from “The Results of Marine Meteorological and Oceanographical Observations” published by the Japan Meteorological Ageney. The surface current data of “GEK “and data of temperature were calculated by means of the regression analysis method. The relationships between the maximum surface velocity (Vo,max)and the surface transport(QS)in the section G, and between the Vo,max and the heat capacity (θ) of the water column between 75 m layer and 17°C isotherm in the section G and Y were analysed.
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发布时间：2023-04-28 - 摘要：In this paper, the seasonal variations of the position of surface axis of the Kuroshio in the east and northeast sea region of Taiwan are analysed.关键词：SEASONAL VARIATIONS;POSITION OF SURFACE AXIS
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发布时间：2023-04-28 - 摘要：Applying statistical method to the CSK data, a relation between density (σt) and temperature (T) of sea water of the Kuroshio in the region to the east of Taiwan has been found. The data of eight hydrographic section across the Kuroshio in the region to the west of 130°E were chosen and calculated for examining this relation. The value of root-mean-square error of the density obtained by this relation.The value of root-mean-square error of the density obtained by this relation is 0.06×10-3g?cm-3. Through the comparision of the results of the dynamic calculation by this T-σt relation with those by classical T-S-σt relation, it was shown that the error of the current velocity by this relation is permissible. Therefore, it is possible to calculate the geostrophic current velocity simply from temperature, if, only the rough current structure of the Kuroshio in the region is required.
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发布时间：2023-04-28 - 摘要：In this paper, data collected during 1965--1970 from Bohai Sea, Yellow Sea and East China Sea, on the characteristics of sound of croaker (sciaenoid fishes) with a greater sound-producing mechanism are analyzed and assessed. Spectrum analysis and data-processing were conducted in four different ways for the same sample. The value of basic parameter in sound power spectrum, such as spectral structure,distribution of spectral peak,etc. were obtained accordingly for six different fishes groups. It is indicated that the sound production of each species varied diurnally, and the differences were exhibited in different species and locations. The sounds of the sciaenoid fishes are produced by the vibration of muscles around or attached to the swim bladder. Their acoustic signal is of lower freguency, its frequency bandwidth is narrow, ranging about 400-1000 Hz, and the tones are monotonous about one octave. It was shown by analysis that the sound production of aggregate fishes did not coincide with the common opinion that the greater the velocity of water current, the stronger the intensity of aggregate sound.According to the characteristics and regularities of the sound production, it may be postulated that the sounds are likely to be means of communications of the fishes.关键词：SOUND PROUDUCTION;CROAKER
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发布时间：2023-04-28 - 摘要：The concentration of 137Cs in surface water of the East China sea and adjacent region (128°00'-129°00′E, 26°28′-32°33'N) was determined in 1978. The values vary from 0.047 pCi/L to 0.244 pCi/L. The mean value is 0.140 pCi/L.It shows that radioactive contamination of Caesium 137 is low. Based on the data obtained by us and other workers, we plotted its yearly change against its concentration as shown in Fig. 1.
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发布时间：2023-04-28 - 摘要：The three coastal lines north of Hai'an, Jiangsu Province, about 6000, 2000 and 900 years ago respectively were very close. They were smooth, straight and stable for a considerable period of time. The coast south of Hai'an advanced rapidly owing to the development of the northern bank and the southward shift of Changjiang River (Yangtze River) mouth. The Huanghe River (Yellow River) changed its course and entered into the sea in the central region of Jiangsu Province at the begining of 1lth century. Abundant materials were brought into the sea, sedimental accumulation increased rapidly and a delta was thus formed toward the sea. Terrigenous materials were, however, cut off in the middle part of nineteenth century when the Huanghe River shifted again its course to the north. Abrasive process of the aleurite aceumulation began, resulting the convex coast being regressed and the concave one being adnanced. The charaeteristics of this dynamic coast was exhibited in sections of its growth and collapse as shown by coastal abrasion-tidal shoal erosion, coastal accumulation-tidal shoal accumulation, coastal abrasion-tidal shoal accumulation. The mouth of Changjiang River (Yangtze River) was of a bugle shape some 6000 years ago. Through the incorporation of sandy islands and bars into the north bank and the expansion of shoals near by the south bank, the channel narrowed and the estuary shifted to the south to form the present geography of the river mouth. The south bank of Changjiang River (Yangtze River) remained stable before the 8th century and between the 16th and 19th centuries. There are scores of shoals, sandy bars and islands in the river mouth at present. The dynamics of their formation and development are the result of the interaction of runoff and tidal current. There exist a regression of the south edge and an accumulation of the north edge of the sand island. There is a general tendency for the Chongming Island to incorporate into the north bank to form a new Qidong Spit and the Changxing Island into other sand islands to form a new Chongming Island. The south bank will regress under the combined action of runoff and wind waves. The south navigation channel will be considerably affected by the siltation of the shoal of Nanhui Spit shoal.关键词：COASTAL EVOLUTION;DYNAMICS
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发布时间：2023-04-28 - 摘要：This paper presents a general description of modern deposition on the continental shelf of the East China Sea. The material upon which this study was based consisted of core and surface sediment samples。 On the continental shelf. the modern sediments consist mainly of clay, while in the region of estuaries and the Jianggang Bay in northern Jiangsu Province, they consist mainly of sand. In the region south of the Changjiang (Yangtze) River mouth, at water depths of less than 50-60 meters, the area of clayey sediments ranges from 90-100 kilometers in width, being thickest near the shore, measuring about 40-50 meters and thinning out toward the sea.It is also vastly distributed in the southern part of the South Yellow Sea where it extends over an area with water depths of 100 meter. its thickness being less than half a meter. The modern sediments on the continental shelf occurred 7000-8000 yrs B.P.when the sea level uplifted to the present position. Transportation and deposition of the modern sediments are influenced by both the movement of terrigenous source materials and current, so the distributive tendency of the modern sediments is consistent with both the consistent variation of suspended materials in. sea water and the current system. The suspened materials that come from the Changjiang (Yangtze) River mouth have been distributed by currents. Some of them are carried southward by longshore current of the East China Sea, and then deposited in the shallow area near the shore south of the Changjiang(Yangtze) River mouth, while the other suspended materials are transported eastwards, and deposited in the southern part of the South Yellow Sea. The suspended materils carried away from the northern and middle part of the South Yellow Sea by southflowing current are also deposited in the southern part of the South Yellow Sea, the residual suspended materials are transported over the continental shelf into the open sea. The sandy materials from the Changjiang (Yangtze)River are deposited in its estuary. The presence of sandy sediments in Jianggang Bay is a result of the action of tidal current. In the area of relict sand only a little biogenic deposition occurred. The continental shelf of the East China Sea may be divided into four modern depositional provinces and one relict depositional province: 1) modern deltaic deposition in the Changjiang(Yangtze)River mouth; 2) shallow sea deposition covering near shore areas from Fujian Province to Zhejiang Province; 3)shallow sea deposition in the northern part of the continental shelf;4) modern tidal current deposition in the Jianggan Bay; 5) relict deposition on the outer continental shelf.关键词：MODERN DEPOSITION;THE CONTINENTAL SHELF OF THE EAST CHINA SEA
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发布时间：2023-04-28 - 摘要：The heavy mineral content data of 235 bottom-surface sediment samples collected from the East China Sea were subjected to statistical analysis by means of the Q-model and R-model. As a result of the Q-model analysis, the area investigated may be divided into 3 mineral provinces: A--the Okinawa Trough mineral province of pyroxene and magnetite;B-the western mineral province of mica, chlorite and dolomite; C-the mouth of the Changjiang River and the middle mineral province of hornblende and epidote. On the other hand, the results of the R-model analysis indicated that the 10 heavy minerals of the area investigated may be divided into 3 mineral groups: A-pyroxene and magnetite; B-mica, chlorite and dolomite; C-hornblende, epidote,granet, ilmenite, staurolite etc. These three mineral groups are similar to the characteristic mineral assemblages of the A, B and C end-members produced by Q-model analysis, respectively. The results of this paper are similar to those obtained in the former paper[1] using characteristic minerals as a basis for delineation of mineral provinces.
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发布时间：2023-04-28 - 摘要：The light mineral in 124 bottom-surface sediment samples from the Changjiang (Yangtze )River and the East China Sea was studied. The 0.1-0.25 mm fraction was analyzed. The light mineral was studied with staining and immersion methods. The light mineral of the area investigated is made up of quartz, plagioclase, orthoclase, muscovite, chlorite, calcite, volcanic glass and glauconite. The area investigated may be divided into 3 mineral provinces on the basis of the light mineral composition:1)the western mineral province of muscovite, chlorite and calcite; 2)the middle mineral province of orthoclase and glauconite; and 3) the Okinawa Trough mineral province of volcanic glass. The results of our study show that the materials of the modern Changjiang (Yangtze) River are transported as far east as about 122°30′E off the mouth of: the Changjiang (Yangtze) River. When these materials are transported south along the coast, they are dispersed slowly as far east as about 123°E.
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发布时间：2023-04-28 - 摘要：Components of clay mineral in the sediments of different regions of the Bohai Sea are much the same. The main clay mineral is illite; chlorite, kaolinite and montmorillonite are less but palygorskite-sepiolite are scarce. From the component, the crystallinity and the distribution of clay mineral in the Bohai Sea, it is shown that they are not controled by sedimentary enveroment but depend on the component of sediment and clay mineral of denudation area, as well as on the hydrodynamic condition of the Bohai Sea. Based on the changes of the clay mineral component and of the chemical element content,the Bohai Sea may be divided into two regions of clay mineral component,the boundary of which lies from the estuary of Luanhe River to the town of Penglai. 1. Illite-kaolinite-chlorite mineral region, which is located in the south part of the Bohai Sea (in Bohai Bay and. Laizhou Bay). This region was mainly affected by the Huanghe River (Yellow River ) and partly by Lanhe River. 2. Illite-chlorite-kaolinite-montmorillonite region, which is located north part of the Bohai Sea (in the Liaodong Bay).关键词：CLAY MINERAL;SEDIMENTS;BOHAI SEA
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发布时间：2023-04-28 - 摘要：In the present paper, the elements Ti, Cr, Mn, Ni, Cu, Ga and Ba in 74 surface sediment samples from the East China Sea were determined by atomie emission spectrophotometry of Model ИCJI-28. The error in these determinations was< 25%.The concentration of these elements in the sediments was less than 1%. The results of the study are shown as follows. The average concentrations of Ti,Cr, Mn, Ni, Ga and Ba in the sediments appear to increase gradually with the decrease of grain slze of sediments. However, the concentration of Cu varies inversely with the grain size. In the region of the continental shelf of the East China, Sea. the average concentrations of Ni and Ga in the sediments appear to increase obviously with the increase of biogenous sediments. With the increase of the depth of sea water over the continental shelf, the concentrations of Ni and Ga increase at first and then decrease, while the concentration of Ba first decreases and then increases. From the continental slope to Okinawa Trough, the concentrations of all these elements increase, and among them, Mn increases more obviously than others. The elements Ti, Cr, Cu and Ga in the sediments were derived primarily from the mainland of China, while Mn, Ba and Ni came primarily from the open ocean adjacent to the East China Sea. The elements Ti in the sediments appeared to be transported in several different forms. However, the element Cu was transported within the crystal lattice of rock detritus. The rate of the transportation of Ti in the East China Sea was low, and its sedimentary rate was higher than those of other elements, but for Ni it was to the contrary. In the upwelling area, the trace elements were abundant.
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发布时间：2023-04-28
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