最新刊期
期 28 ， 1987
- 摘要：In this layered three dimensional numerical ocean model the seasurface is free to allow simultaneous simulations of surface and internal tides. Since the propagating speed of the external wave is much greater than those of internal waves, the Courant-friedrichs-lewy (CFL) condition for external mode is much more restrictive than that for internal modes. In the present model an alternating direction implicit (ADI) scheme is employed for external mode computation to avoid the restriction of CFL condition. The internal modes are computed with an explicit treatment. The model has been preliminarily applied for simulation of internal tides generated by surface tides in the northwestern South China Sea.关键词：nternal tides,layered three dimensional numerical ocean model
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发布时间：2023-04-28 - 摘要：On the basis of CTD data obtained in the large-scale hydrologic investigation carried out in the northern East China Sea shelf in June of 1984 and 1985 by the Institute of Oceanology,Chinese Academy of Sciences, BT data obtained during 1975-1980 by the State Oceanic Administration in sectional observation in the East China Sea, inversion phenomena (and its cause of formation )of temperature and salinity in the northern East China Sea shelf and the geographic distribution for every characteristic value of the inversion layer of temperature and salinity were analysed and studied. The results in question show that the inversion structural fields of temperature and salinity in the northern East China Sea shelf are basically distributed in the vast sea area in the vicinity southwest off Cheju Island, then extends southeast and then turns south. There also exists yearly variations. The temperature inversion layers consist mainly of intermediate cold water; the inversion layers of salinity consist mainly of intermediate low salinity water, intermediate high salinity, and the alternately intermediate low and high salinity waters. The distribution characteristics for every characteristic value of inversion layer clearly showed that the stronger inversion layers in the structural fields are generally thicker. There is often simultaneous occurrence of inversion layers of temperature and salinity.关键词：northern East China Sea shelf ,temperature and salinity
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发布时间：2023-04-28 - 摘要：This paper deals with the analysis of main oceanographic characteristics of the tropical Western Pacific Warm Pool based on data on SST, temperature, and salinity along Sections 137°E and 155°E. The results showed that the shape of the warm pool(surface area, thickness, and northern, eastern and southern boundary locations ),the highest temperature, and the salinity have obvious seasonal and interannual variations related to El Nino events.关键词：TROPICAL WESTERN PACIFIC WARM POOL,OCEANOGRAPHIC CHARACTERISTICS
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发布时间：2023-04-28 - 摘要：The circulation and mixing in the region of Prydz Bay, Antarctica were studied on the basis of the hydrographical data acquired from the Seventh Chinese National Antarctic Research Expedition (1990/1991). The main results are: (1)In the observed region,the Antarctic Divergence is located within the range of 60°30′-66°S, and is the boundary between the Antarctic Circumpolar Current (ACC) and the Antarctic Coastal Current (AACC). (2) The eastward ACC consists of both barotropic and baroclinic components having the same order of magnitude. (3) The westward AACC driven mainly by east winds is barotropic with its speed of 5-10cm/s. (4)In the 63-64°S region of the 73°E section the geostrophic currents at the surface layer (0-32.5m) and subsurface layer (32.5m-112.5m) had opposite directions, which seems to indicate that there was a kind of internal wave propagating vertically in January, 1991.(5)In the study area the 68°-73°E and 98°-108°E region were the strong mixing area due to vertical convection between the Circumpolar Deep Water and Antarctic Shelf Water, which produced heavier water(σt=27.90)down to below 800m.关键词：Prydz Bay,Antarctica,CIRCULATION,MIXING
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发布时间：2023-04-28 - 摘要：There are several coastal upwelling areas in the Taiwan Strait. The most active and the longest term duration upwelling areas are located at the east side of Haitan Island, south-east side of Dongshan Island and south side of Taiwan Shoal. In this paper, the causes of generation, evolution and decay process of upwellings off the western coast of Taiwan Strait were analysed by using historical weather data, current and seawater temperature data obtained from 1983 to 1989. The influences of dynamical factors (such as currents, monsoon and tide mixture)were evaluated and compared. Results showed that current and monsoon are the main causes of the generation, evolution and decay process of upwellings off the western coast of Taiwan Strait. Because of the instability of monsoon speed and the discontinuity of longshore wind, the main factor influencing the generation and maintainance of coastal upwelling in the research area is current.关键词：TAIWAN STRAIT,UPWELLINGS,GENERATION,EVOLUTION,DECAY PROCESS
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发布时间：2023-04-28 - 摘要：Hydrological investigation data were used to analyze the characteristics of the salinity distribution and the extenion of the Yellow River Diluted Water (YDRW) in the sea. After the Yellow River relocatid eastward to Laizhou Bay in 1976,it was found that the YDRW extends east ward and northeast ward during the plentiful water period (from June to October), and southeast ward during the dry season (from November to May). The main factors affecting the extension direction of the YRDW were found to be theYellow River runoff, monsoon and current systems near the Yellow River Estuary. The critical value of discharge which makes the YRDW turn eastward or northeastward is 2.2×109m3 per month.关键词：TURNING PHENOMENA,YELLOW RIVER DILUTED WATER
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发布时间：2023-04-28 - 摘要：Satellite photographs and weather charts during the 1983 to 1994 marine fog seasons were used to analyze the distribution and formation, movement pattern and occurrence frequency of marine fog. The results showed that during the marine fog seasons, the SST in the Yellow and East China Seas was optimum for marine fog formation as soon as S-SE winds occur. Three patterns for favering marine fog formation and the synoptic type for following day predicting marine fog were indicated. Finally, a heavy fog case is discussed in detail.关键词：YELLOW SEA,EAST CHINA SEA,marine fog
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发布时间：2023-04-28 - 摘要：Empirical orthogonal function analysis of the marine heating anomaly pattern over the Northwestern Pacific subtropical area in winter and the relationships between the first three patterns of the marine heating anomaly and the Subtropical High showed that the first component in winter was mainly characterised by large positive values in most areas, and had some effects on the Northwestern Pacific Subtropical High and that the lst component's time coefficients related closely to the Northwestern Pacific Subtropical High in winter, spring and the early summer. The more (less) the marine heating over the subtropical area was, the more the Subtropical High weakened (enhanced) and shifted southward (northward) and eastward (westward).关键词：subtropical area,Subtropical High, marine heating
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发布时间：2023-04-28 - 摘要：Cross-spectrum revealed the coupling relationships between the Nansha sea surface temperature (SST), the Central and Eastern Equatorial Pacific SST, Southern Oscillation (the difference between the standardized sea level pressure at Darwin and Tahiti)and the Western Pacific Subtropical High. The results showed that there are apparent coupling periods of 2,5 and 23.3-46.5 months among them, and the inphase low-frequency coupling oscillation of 2-3.8 years period is predominant and associated with the ENSO events. The physical processes affecting the Nansha SST are discussed. During the ENSO events, the Central and Eastern Equatorial Pacific SST increase, then the Western Subtropical High develops and extends westward. The cloudiness over the Nansha area decreases, the Nansha SST increases, and vice versa. The variations of cludiness over the Nanhai (weak ocean current area) play an important role in influencing the Nansha SST under the control of the Western Subtropcal High.关键词：NANSHA WARM WATER,WESTERN PACIFIC SUBTROPICAL HIGH,ENSO
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发布时间：2023-04-28 - 摘要：Based on the material flux and characteristic chemical component content in the suspended matter, the equation of the resuspension rate of the suspended mater is: αr: resuspension rate; CSA, CrA, CA are respectively the content of characteristic chemical component in the sea -born suspended matter, mixing suspended matter and sediment. The results showed that: (1)the resuspension rate is more than 96% in the bottom layer and more than 32% in the surface layer (2)the choice of the chemical component,A, is very important in the suspended matter in order to satisfy all three assumed conditions when the equation is used and the average standard deviation(?n-1) is less than 2.1%.(3)the resuspension rate in the suspended matter must be considered when calculating the material flux in the East China Sea.关键词：EAST CHINA SEA,RESUSPENSION RATE,SUSPENDED MATTER
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发布时间：2023-04-28 - 摘要：It is very necessary to investigate the corrosiveness of ocean engineering geology and seabottom sediments, to measure the PH, Eh, ρ and corrosion electrochemical parameters of sediments. Previous measurements methods were all conducted in a test container by filing it with seabottom mud taken from a geology sampling device. The structure of the original seabottom mud was destroyed by this method as the mud was exposed in the air for sometime, and so was affected and polluted by air factors and accuracy and repeatability of the results were comparatively poor. In this in-situ method for measureing sediment corrosion factors, the measurement was conducted directly via a sensor in a corrosion factor measurement tube, containing seabottom mud from an ocean engineering geology sampling device. The shortcommings of the previous damaging methods were overcome and the new method was very valuable in practical applications.关键词：CORROSION,STEEL,SEABOTTOM SEDIMENT,
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发布时间：2023-04-28 - 摘要：A corrosion testing of steel (A and API5LX52)was conducted in the beach soil of Tanggu and Yangjiaogou situated in Bohai Sea coast for two years. The average corrosion rates of A, steel and API5LX52 steel are 0.035-0161mm/a and the pit corrosion rates are 0.356-1.56mm/a The corrosivenesses of beach soil are different according to the positions and depth of beach soils. The corrosiveness of Tanggu beach soil is stranger than the Yangjiaogou, and the -1.0m layer soil of Tanggu and Yangjiaogou have stronger corrosiveness than the-1.5m layer and the surface layer.关键词：STEEL,CORROSION TESTING, BEACH SOIL OF BOHAI SEA
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发布时间：2023-04-28 - 摘要：Experiments on the corrosion fatigue of welded steel joints in air and seawater, and in seawater with cathodic protection, yielded bata for linear regression to obtain fatigue-life curves(?S-Nf). The laws of corroion fatigue in welded joints of test steel are discussed with referrence to those of A587 and A131 steels there. In the expriments above, the fatigue damage occurring at all welded joints around the weld bead resulted in the cracking and fracture there. The fatigue life of the speciments in seawater was longer than that in seawater, almost reaching the length of the fatigue life in air.关键词：WELDED STEEL JOINTS,CORROSION FATIGUE
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发布时间：2023-04-28 - 摘要：An abrupt grow from about 60mV to 30mV of the Tafel slope was observed in an acid bromide solution tested by cyclic polarization method as well as changing sweep speed. The results proved that the change of anodic Tafel slope should be due to anodic desorption of bromide ions on the iron surface.关键词：BROMIDE IONS,ANODIC DISSOLUTION,IRON IN AN ACID SOLUTIONS
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发布时间：2023-04-28 - 摘要：To interpret the experimental results of anodic desorption of bromide ion on iron surface,a kinetic model was established. This kinetic model can be used to calculate the desorption potential, the Tafel slope and reaction order in the inhibition area, to yield theoretical values agreeing well with observed results.关键词：BROMIDE ION,KINETIC MODEL OF ANODIC DESORPTION
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发布时间：2023-04-28 - 摘要：The vertical variation and daily change of nutrients and effect of rainwater on seawater nutrients were studied by analysing of sea water nutrients from Nov 1992 to Feb 1993 in the tropical west Pacific, TOGA COARE IOP(4°S156°E). The results showed that dissolved phosphate and silicate increased with depth and that dissolved phosphate minimized at 50m layer Dissolved phosphate and silicate were controlled by discomposition of biological excrement and corpse decomposition under the euphotic layer. NO2-N and NH4-H having inverse distribution tendency showed that they were controlled by inter-transformation of NO2- N and NH4-N. The daily change research showed that mechanism controlling disscoved phosphate is similar to that for silicate during daytime, but is different during nighttime. Phophate and silicate maximized at 4 o'clock, a. m or p. m, and the situation is indefinite under the euphotic layer. Rainwater increased the alkalinity and decreased reduction in the surface layer seawater.NO2 -N could increase 134.86% and PO4-P 6.78%, but SiO3 - Si was almost constant and NH4-N could decrease at the surface layer seawater. The study showed, rainwater could supply N and P to seawater in some degree, and it is one of the important resources of N and P.关键词：NUTRIENTS,RAINWATER,SEAWATER NUTRIENTS,TROPICAL WEST PACIFIC TOGA COARE IOP
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发布时间：2023-04-28 - 摘要：Analysis of 6183 stomach contents of 60 fish species collected from the Changjiang River Estuary during 1985-1988 and 1991-1993 showed that 10 species of the fish were planktophagic with pelagic copepod as their main food items, 14 species were benthophagic, mainly feeding on benthic crabs and shrimps, 11 species were nektophagic, mainly preying on cuttlefish and small fish, other 25 species were mixed feeding fish with crabs, shrimps, cuttlefish and small fish as their main prey items.关键词：FOOD WEB,TROPHIC STRUCTURE,FISH IN THE CHANGJIANG RIVER ESTUARY
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发布时间：2023-04-28 - 摘要：Feeding-growth experiments on young black porgy (Sparus macrocephalus B.) weighing 4.19-70.16g, were carried out in four ration levels. Measurement of the carcasses'water, energy, protein and lipid content showed that the energy content, protein and lipid content were positively correlated with ration levels but that water content was negatively correlated with ration levels. The linear relationship between energy, protein or lipid content and water content was discussed. The coefficients of the regressions relating energy and lipid content to water content were so high that the water content was used as a index to estimate indirectly the energy content and biochemical composition Models relating dry matter content and energy content to ration level Body weight and mean water temperature were obtained using stepwise regression.关键词：ENERGY CONTENT,BIOCHEMICAL COMPOSITION,YOUNG BLACK PORGY
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发布时间：2023-04-28 - 摘要：The requirement for dietary n-3HUFA for growth and survival in black sea bream (Sparus macrocephalus ) larvae was tested using Artemia with various levels of n-3 HUFA.Four treatments for Artemia differing in the relative content of their n-3HUFA(32.0, 33.0,35.1, 36.2mg/100mg TFA) were prepared by feeding them various oil emulsions. The results indicated that dietary n-3HUFA significantly influence fish n-3HUFA levels and are necessary for good growth and survival in black sea bream larvae. The optimal value of n-3HUFA level in Artemia should be=4.273%(wet weight) for the best growth and survival in black sea bream.关键词：ARTEMIA, n-3HUFA, BLACK SEABREAM LARVAE
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发布时间：2023-04-28 - 摘要：This paper presents results of studies on the composition and quantity dynamics of nektonic invertebrates in Jiaozhou Bay and adjacent waters using materials including 78 nektonic invertebrate species collected in May and August, 1986-1995. Mollusca 33 species, Crustacea 27 species, Echinodermata 10 species and 8 other species. The average density in August and May were 207×103 ind /k㎡ and 54×103 ind/k㎡ respectively. The maximum density (594×103ind. /k㎡)occurred in August，1990 and the minimum(24×103ind./k㎡) in May1995.The average stock biomass were 881 tons in August and 363 tons in May. The stock biomass maximum (1614 tons) occurred in August, 1990 and the minimum (56 tons)in May 1995. The ecological features and quantity dynamics of Loligo japonica, Loligo beka,Sepiella maindroni, Sepia esculenta, Octopus ocellatus, Octopus variabilis, Portunus trituberculatus,Charybdis japonica, Oratosquilla oratoria, Metapenaeus joyneri and Trachypeneus curvirostris are described.关键词：Jiaozhou Bay,NEKTONIC INVERTEBRATE RESOURCES
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发布时间：2023-04-28 - 摘要：A new genus and species of the Family Corophiidae, Genus Paraphotis and Paraphotis sinensis sp n.,are described from China Sea. The materials were collected in shallow waters of Dalian (North Yellow Sea )and Daya Bay (South China Sea) in 1994. The type specimens of the new genus and new species are deposited in the Institute of Oceanology Chinese Academy of Sciences.关键词：Costellariidae,Amphipoda
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发布时间：2023-04-28 - 摘要：This paper deals with the Costellariidae species found from Chinese coastal waters. The materials were mainly collected by the Institute of Oceanology, Chinese Academy of Sciences in the past years, and 13 species belonging to 1 genus 3 subgenera are identified among which 6 species are recorded for the first time from China (marked with asterisk).关键词：FAMILY COSTELLARIIDAE,CHINESE COASTAL WATERS
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发布时间：2023-04-28 - 摘要：48 species of Mysidacean Crustacea have been found in the western part of the East China Sea and are reported here. Among them 7, species, viz. Paralophogaster glaber Hansen,Lophogaster pacificus Fage, Gnathophausia ingens (Dohrn), G. zoea Willemoes-suham, Eucopia australis Dana, Boreomysis rostrata Illig. Lophogaster sp, are deep water species with wide distribution range. Their zoogeographical charactersitics are different. Paralohogaster glaber Hansen has also been found in the Atlantic besides the Pacific and Indian waters. Zoogeographical analysis are made here with the 41 shelf species. The following 17 species are widely distributed throughout the tropical Indo-west Pacific or the West Pacific Warmwater Region:关键词：MYSIDACEA FAUNA,EAST CHINA SEA
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发布时间：2023-04-28
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