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Geological comparative studies of Japan Arc System and Kyushu-Palau Arc

Acta Oceanologica Sinica 2011年第4期30卷 107-121页

作者： YAN Quanshu SHI Xuefa Key Laboratory of Marine Sedimentary and Environmental Geology First Institute of OceanographyState Oceanic AdministrationQingdao 266061China

Based on the published data of structure geology,geochronology,petrology and isotope geochemistry,the authors of this paper have conducted studies on the tectonic evolution history of Japan arc system and Kyushu-Palau ridge（KPR） . The studies show that the initial Japan arc system was resulted from the subduction of ancient Pacific plate beneath Eurasian Plate in Permian. It was part of an Andean-type continental volcanic arc which occurred in the offshore in the east of Asian during late Mesozoic era. The formation of tertiary back-arc basin（Japan Sea） resulted in the fundamental tectonic framework of the present arc system. Since Quaternary the system has been lying at E-W compression tectonic setting due to the eastward subduction of Amur Plate. It is expected that Japan arc system will be juxtaposed with Asian continent,which is similar to the present Taiwan arc system. The origin of Philippine Sea Plate（PSP） is still in debate. Some studies argued that it is a trapped oceanic crust segment,while the others insisted that it is a back-arc basin accompanied with ancient IBM arc. However,it is all agreed that the tectonic evolution of PSP started since 50 Ma,i.e.,PSP has drifted from the site around equator at 50 Ma to the present site,and the subduction of PSP along Nankai trough-Ryukyu Trench beneath the Japan arc system during 6–2 Ma led to the formation of the present Ryukyu arc system. Of the PSP,the KPR has been found with the oldest rocks formed at 38 Ma. Combining with its geochemical characteristics of oceanic arc tholeiite,it is suggested that KPR is an intraoceanic volcanic arc,more specifically,a relic arc（i.e.,rear arc of the ancient IBM） after rifting of ancient IBM. In addition,Amami-Daito province is of arc tectonic affinity,but has been affected by mantle plume. Therefore,based on their respective tectonic evolution history and geochemical characteristics of rock samples,it is inferred that there is no genetic relationship between Japan arc system

关键词： Japan arc system Kyushu-Palau ridge (KPR) Philippine sea plate (PSP) Tectonic evolution geochronology geochemistry

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Comparison on ecological and physiological characteristics of Drepanopus bispinosus (Copepoda:Calanoida) between two populations in Burton Lake and Fletcher Lake, two Antarctic lagoons

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Acta Oceanologica Sinica 1991年第4期10卷 613-624页

作者： Wang Zipan Second institute of oceanography, state oceanic administration, Hangzhou 310012, china

Calanoida copepod, Drepanopus bispinosus occurred in both saline lakes, Burton ( S=40) and Fletcher ( S = 56) in Vestfold Hills, Antarctica. Evident differences between two populations in biology and physiology were observed in September and December, 1984. The population in the Burton lake was denser with stronger body and more tolerant to temperature and salinity than that in the Fletcher Lake, reflecting their possible differences of genetic or nongenetic adaptation. The population in the Burton lake has been adaptated to the lake environment, and the population in the Flethcer Lake is in the acclimatization course in the lake habitat.

关键词： two Antarctic lagoons between two populations in Burton Lake and Fletcher Lake Copepoda

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Some observational results of sea storm current

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Acta Oceanologica Sinica 2001年第2期20卷 299-308页

作者： Xiu Richen, Liu Aiju, Ye Hesong, Gu Yuhe, Xu Lanying (1. first institute of oceanography, state oceanic administration, qingdao 266061, china 2. institute of Oceanology, Chinese Academy of Sciences, qingdao 266071, china) first institute of oceanography State Oceanic Administration Qingdao 266061 China

INTRODUCTIONDr. Hollister, a marine geologist of the Woods Hole Oceanographic Institution, first pointed out that there was ocean storm current in the ocean. He found out the wavy texture in the seabed core samples, and suggested that this wavy texture was caused by the high speed sea current in remote antiquity. He then suggested a bold hypothesis that there existed a benthic storm current near the ocean bottom, and presented this hypothesis at the IUGG conference held at San Francisco in 1963. Unfortunately, the attention was not drawn to the hypothesis at the conference, and the hypothesis was criticized as a sheer nonsense.

关键词： Sea storm current tidal storm current chaotic motion

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The variation of the Kuroshio during 1986-1988

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Acta Oceanologica Sinica 1991年第3期10卷 355-371页

作者： Sun Xiangping, Wang Yuanpei, Yuan Qike and Xu Hongda first institute of oceanography, state oceanic administration, qingdao, chinaNorth Sea Branch of state oceanic administration, qingdao, china

On the basis of the analysis of the data obtained from five cruises of the R/V Xiangyanghong 09 and the data from Japan, it is shown that a large meander of the Kuroshio appeared again during 1986-1988. The processes of formation , maturity and decline of this large meander are discussed in this study. The variation of the volume transport at Section Kb (PN) in the East china Sea is related to the large meander of the Kuroshio in the area south of Japan. By using maximum entropy spectrum analysis,the volume transport of the Kuroshio and the swing of its axis are analysed and their major periods are obained.

关键词： The variation of the Kuroshio during 1986-1988

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Detection of the Kuroshio frontal instable processes (KFIP) in the East china Sea using the MODIS images

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Acta Oceanologica Sinica 2010年第6期29卷 35-43页

作者： JIA Yongjun ZHANG Jie National Satellite Ocean Application Service Beijing 100081 China first institute of oceanography State Oceanic Administration Qingdao 266061 China

The Kuroshio frontal instable processes （KFIP） in the East china Sea （ECS） not only have a great impact on the hydrologic characteristics,the pollutants drift,the distribution of seafloor sediment and the ships navigation of the ECS,but also are closely related to the climate changes of the coastal areas of the *** the frequency and area of occurrence of the KFIP have not been studied fully and *** of its high spatial and temporal resolution,MODIS data is a kind of very good data source for surveying and researching the KFIP in the *** aim of this study is to detect the KFIP in the ECS by using MODIS data,and to study the frequency and region of occurrence of the KFIP in the *** selection has coverage of level 2 data of MODIS SST and Kd490 ranging from July 1,2002 to June 30,2009 of the ECS when there was no cloud impact or *** using of the data,the minimum standard of the Kuroshio temperature fronts and the diffuse attenuation coefficient （Kd490） fronts of the ECS are *** on these standards and the curvature distinguish methods,the standard of curvature distinguish for the KFIP in the ECS are put *** making use of this standard,we study a total of 2073 satellite-derived images,and discover that as long as there is no cloud impact from January to May and October to December,the KFIP in the ECS are surely found in MODIS satellite *** June to September,the frequency of occurrence can also reach to 82.9% at ***,it is obtained that there are three source regions of these instability processes,namely,（26°N,121.5°E） nearby,（27°N,125°E） nearby and （30°N,128°E） *** differences of the characteristics of these instability processes which are generated in different regions are analyzed in the present study.

关键词： Kuroshio frontal instable processes frequency and region of occurrence East china Sea MODIS

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A new CFAR ship target detection method in SAR imagery

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Acta Oceanologica Sinica 2010年第1期29卷 12-16页

作者： JI Yonggang ZHANG Jie MENG Jummin ZHANG Xi first institute of oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Science and Numerical Modeling State Oceanic AdministrationQingdao 266061 China

Many ship target detection methods have been developed since it was verified that ship could be imaged with the space-based SAR systems. Most developed detection methods mostly emphasized ship detection rate but not computation time. By making use of the advantages of the K-distribution CFAR method and two-parameter CFAR method, a new CFAR ship target detection algorithm was proposed. In that new method, we use the K-distribution CFAR method to calculate a global threshold with a certain false-alarm rate. Then the threshold is applied to the whole SAR imagery to determine the possible ship target, pixcls, and a binary image is given as tile preliminary result. Mathematical morphological filter are used to filter the binary image. After that step, we use tile two-parameter CFAR method to detect the ship targets. In the step, the local sliding window only works in the possible ship target pixels of the SAR imagery. That step avoids the statistical calculation of the background pixels, so the method proposed can much improve the processing speed. In order to test the new method, two SAN imagery with different background were used, and the detection result shows that that method can work well in different background circumstances with high detection rate. Moreover, a synchronous ship detection experiment was carried out in qingdao port in October 28, 2005 to verify the new method and one ENVISAT ASAR imagery was acquired to detect ship targets. It can be concluded from the experiment that the new method not only has high detection rate, but also is time-consuining, and is suitable for the operational ship detection system.

关键词： ship target diction SAR. CFAR

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A study on the source of the Tsushima Warm Current water

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Acta Oceanologica Sinica 1991年第3期10卷 341-353页

作者： Song Wanxian, Lin Kui and Guo Binghuo first institute of oceanography, state oceanic administration, qingdao, 266003, china

On the basis of the hydrographic data in the area west of Kyushu from four cruises of R/V Xiangyanghong No. 9 from 1987 to 1988 , the circulation features in the investigation area are described and the source of the Tsushima Warm Current water (TWCW) is explored by using the observed and geostrophic current results and tracking the Kuroshio Subsurface High Salinity Core (KSHSC).

关键词： A study on the source of the Tsushima Warm Current water

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Ecological studies on the Hydromedusae, Siphonophores and Ctenophores in the Xiamen Harbour and adjacent waters

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Acta Oceanologica Sinica 1990年第3期9卷 429-438页

作者： Lin Mao and Zhang Jinbiao Third institute of oceanography, state oceanic administration, Xiamen, china

This paper deals with species composition, seasonal change and horizontal distribution of the Hydromedusae (Hyd.), Siphonophores (Sip.) and Ctenophores (Cte.) and their relationship to the environmental factors. Materials from 17 stations in the Xiamen Harbour and adjacent waters were taken once monthly for the period from Sep. 1980 to Aug. 1981. The results indicate that for the dominant species of Phialidium folleatum, Lensia subtiloides and Pleurobrachia globosa , the total annual number of species has one peak and the total annual number of individual has one peak and two secondary peaks. On the basis of their ecological characteristice, the Hydromedusae, Siphonophores and Ctenophores found in the region investigated may be divided into the following ecological groups: estuarine group, neritic group and oceanic group. Their seasonal succession is correlated with the relative intensity of several water systems.

关键词： Zhang Ecological studies on the Hydromedusae

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Multivariate analysis for ordination and comparison of size of Artemia cysts

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Acta Oceanologica Sinica 1998年第4期17卷 537-544页

作者： Tang Senming (Third institute of oceanography, state oceanic administration, Xiamen 361005, china) Third institute of oceanography State Oceanic Administration Xiamen 361005 China

It is known that the biometrics of brine shrimp cysts is of strain inherent. The analysis and comparison of the cyst charcters for the identification of unknown cysts from different geqraphical origin become mpible. In this paper, multivallate methods, mainly Principle Component Analysis (PCA) and Nonmetric Multi-dimensional Scaling (MDS), are used for the purpose. od results are gained with the analysis of the published data and some row data from cyst sizes. It shows that multivariate methods can cluster the similar characteristics of batch cysts and make out impure or mingled cysts of different origin. Amng others, MDS, with row data from the cyst measurement, can be easily used for the analysis of cyst ordination and comparison. The result demonstrates that the cysts of Chinese parthenopnetic brine shrimp are well discriminated by their geographic locations along the coastal china with larger size disttibuting in the south.

关键词： Artemia,cyst biometrics multivariate analysis

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Distribution of indicator dinoflagellates in the East china Sea

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Acta Oceanologica Sinica 1992年第1期11卷 109-122页

作者： Lu Douding Second institute of oceanography, state oceanic administration, Hangzhou 310012, china

-The material discussed in this paper is from four cruises which were carried out in May -June, 1986 (spring), July -August, 1987(summer) .October -November, 1988(autumn)and December, 1987(winter)respectively. Identified dinoflagellates were 141 species (including varieties and forms) belonging to 18 *** to the distribution and ecological characteristics of dinoflagellates species, we can divide them into three groups: 1) Hyporhaline-neritic group: they are distributed only in type Ⅲ and typeⅣ water and they perform an evident function indicating continental coast water; 2) Eurythermic-euryhaline group represented by Protoperidinium depressum, Gentium fusus, etc. They are fond of perching in mixing water which character is similar to that of coast water even though they are distributed in different water systems; 3) Hyperthermic-hyperhaline group: on the basis of varying degrees to which they tolerate temperature and salinity, we can divide them into two sub-groups: euryhyperthermic-euryhyperha-line subgroup and stenohyperthermic- stenohyperhaline subgroup. The first subgroup is represented by Pyrocystis pseudoxoctiluca whose adaptability reaction occurred with the changing of hydrographic environment. The second subgroup is tropic oceanic species which can serve as a good indicator for Kuroshio in the East china Sea. Its biological boundary coincides well with the hydrographic boundary of Kuroshio water.

关键词： area Distribution of indicator dinoflagellates in the East china Sea

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