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Distribution of zooplankton biomass in the southeastern East China Sea

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Acta Oceanologica Sinica 1996年第2期15卷 231-249页

作者： Wang Chunsheng He Dehua Liu Hongbin yang guanming Miao Yutian Yu Honghua Second institute of Deeanopraphy State oceanic Administration Hangzhou 310012 china University of Hawaii 1000 POpe Rad Honolulu HI96822 USA

On the basis of the materials collected from six cruises during 1986～1990 in the Kuroshio and its adjacent waters of the East China Sea, the spatial and temporal changes of zooplankton biomass and the relation to certain environmental factors are analysed in this paper. The results indicated that the biomass peaked in autumn, followed by spring and summer and was the lowest in winter. Its horizontal distribution pattern was higher in the continental shelf area than in the Kuroshio area and in the north than in the south of the surveyed area. The higher biomass regions usually occurred in the fronts between different currents and water masses and in the upwelling region of the Kuroshio subsurface water, and were mainly composed of warm-water eurytopic species and tropic oceanic eurytopic species. The relationship between the vertical distribution of zooplankton biomass(Zw ) and water depth(D) might be expressed by the formual LnZw = a + b × D. The biomass was observed higher in the upper 100 m. The positive correlation between the biomass of bait-animal and the abundance of larval and juvenile fishes was significant. In addition, the higher biomass region in the northern study area (in the vicinity of 29°N, 126°E) overlapped the fishing ground of This study is supported by the National Natural Science Foundation of China under the contrast of Grant-49576275 (Astudy of distinction method and mixing modification of water type and water masses in the East China Sea).

关键词： East China Sea zooplankton biomass

A study on zooplankton distribution patterns and indicator species in Kuroshio upstream area and adjacent East China Sea

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Acta Oceanologica Sinica 1992年第2期11卷 237-254页

作者： He Dehua, Wang Chunsheng, Liu Hongbin and yang guanming( Received July 9, 1990 accepted November 12, 1990)

On the basis of the data of zooplankton biomass and three major taxa—— Copepoda, Chaetognatha andSiphonophora of May-June 1986, July-August and December 1987, the distributional patterns and the indicator species of zooplankton in the Kuroshio and adjacent waters of the East China Sea are preliminarily studied. The results are as follows:The horizontal distribution of zooplankton biomass and the abundance of copepods, chaetognaths and siphonophores arecurred in the continent area northwest of Taiwan and the south-centre section of the East China Sea continent, which are the mix front of different waters. Zooplankton in the water area inside of Ryukyu Islands presented low abundance and high diversity. There are clear seasonal variations in zooplankton biomass and abundance in the study area. The strength or weakness of different water masses and fronts is the basic reason for the variations of zooplankton biomass and *** species composition of zooplankton in the study area is complex and varies, however, the tropic oceanic species predominates overwhelmingly. The distribution of different ecotype species evidences the distribution of different water masses and the state of mixture. The indicator species of each water mass are listed in the paper so as to provide grounds for the variation of currents in the Kuroshio *** temperature and salinity of sea water are important factors affecting zooplankton distribution, composition and diversity , however the role of salinity is major. With the replacement of one season by another, the correlative levels of temperature and salinity to various zooplankton taxa are more or less significant.

关键词： A study on zooplankton distribution patterns and indicator species in Kuroshio upstream area and adjacent East China Sea area

Loss of energetic particles due to feedback control of resistive wall mode in HL-3

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Plasma Science and Technology 2024年第10期26卷 17-28页

作者： Yifei ZHAO Yueqiang LIU Guangzhou HAO Zhengxiong WANG Guanqi DONG Shuo WANG Chunyu LI guanming yang Yutian MIAO Yongqin WANG Dalian University of Technology Dalian 116024People’s Republic of China General Atomics San Diego CA 92186-5608United States of America Southwestern Institute of Physics Chengdu 610041People’s Republic of China

Effects of three-dimensional(3D)magnetic field perturbations due to feedback control of an unstable n=1(n is toroidal mode number)resistive wall mode(RWM)on the energetic particle(EP)losses are systematically investigated for the HL-3 *** MARS-F(Liu et al 2000 *** 73681)code,facilitated by the test particle guiding center tracing module REORBIT,is utilized for the *** RWM is found to generally produce no EP loss for cocurrent particles in *** the same perturbation level at the sensor location for the close-loop system,feedback produces nearly the same loss of counter-current EPs compared to the open-loop *** however that the sensor signal is ten times smaller in the close-loop system than the open-loop counter part(reflecting the fact that the RWM is more stable with feedback),the counter-current EP loss is found significantly reduced in the *** of EP losses occur only for particles launched close to the plasma edge,while particles launched further away from the plasma boundary experience much less *** strike points of lost EPs on the HL-3 limiting surface become more scattered for particles launched closer to the plasma *** into account the full gyro-orbit of particles while approaching the limiting surface,REORBIT finds slightly enhanced loss fraction.

关键词： energetic particles resistive wall mode HL-3

Study on biological oceanography characteristics of planktonic copepods in waters north of Taiwan Ⅰ. Abundance distribution

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Acta Oceanologica Sinica 2000年第2期19卷 69-81页

作者： yang guanming1 He Dehua1 Wang Chunsheng1 Miao Yutian1 Yu Honghua1 (1. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China) Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China

On the basis of the investigation materials of 6 cruise in the waters north of Taiwan from 1987~1990, the distribution characteristics of planktonic copepods are discussed in the study from three aspects of abundance distribution, community feature and indicative species. The paper is the first part of the study. The results show as follows: the highest abundance of copepods occurred in spring and the lowest one in winter, while the abundance in summer and autumn was between the above two seasons. The copepod abundance in the west of the Kuroshio front was higher than that in the east of the front. There was a distribution tendency that higher abundance occurred in outshore area in summer and in nearshore area in winter, which corresponded with the trend of seasonal swings of the Kuroshio front. The higher copepod abundance appeared generally in the mixed areas of various water masses, especially in nearshore side of upwelling of the Kuroshio sub-surface water. However, in the Kuroshio subsurface main water, the abundance was low because of some factors such as low concentration of dissolved oxy gen and so on. The vertical distribution trend was that the copepopd abundance decreased with the in crease of depth, and the diurnal vertical migration regularities of some species were probably the one of reasons that caused the abnormal distributions in some local waters.

关键词： Waters north of Taiwan Planktonic copeods abundance

Study of zooplankton ecology in Zhejiang coastal upwelling system-Species distribution and diversity of zooplankton

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Acta Oceanologica Sinica 1988年第2期 304-313页

作者： He Dehua, yang guanming, Shen Weilin and Liu Hongbin Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China

The species distribution and diversity of zooplankton and the effects of hydrodynamic factors of Zhejiang coastal waters during the active period of upwelling are *** dominance (low diversity), high biomass and short food chain were found in the landward margins of the central region of the upwelling. There were evident interactions between the distribution of zooplankton and the environmental factors. The expression of these interactions is that different ecotypes of zooplankton adapt to different hydrological situations. There is significant positive correlation between the diversity indices of zooplankton and the mean water temperature in the survey area. It is noted that the vertical distribution of Calanus sinicus indicates to a certain extent the colder water environment of the upwelling (Fig. 7, Table 2, Reference (Hargreaves, 1981).

关键词： Study of zooplankton ecology in Zhejiang coastal upwelling system-Species distribution and diversity of zooplankton

Effect of ideal internal MHD instabilities on NBI fast ion redistribution in ITER 15 MA scenario

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Plasma Science and Technology 2023年第5期25卷 8-19页

作者：杨冠铭刘钺强王志斌王雍钦苗雨田郝广周 Southwestern Institute of Physics Chengdu 610041People’s Republic of China General Atomics San DiegoCA 92186-5608United States of America Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082People’s Republic of China

Transport of fast ions is a crucial issue during the operation of *** of neutral beam injection(NBI)fast ions by the ideal internal magnetohydrodynamic(MHD)instabilities in ITER is studied utilizing the guiding-center code ORBIT(White R B and Chance M S *** 272455).Effects of the perturbation amplitude A of the internal kink,the perturbation frequency f of the fishbone instability,and the toroidal mode number n of the internal kink are investigated,respectively,in this *** n=1 internal kink mode can cause NBI fast ions transporting in real space from regions of 0

关键词： ITER NBI fast ions internal kink mode fishbone instability ORBIT

Study of zooplankton ecology in Zhejiang coastal upwelling system-Zooplankton biomass and abundance of major groups

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Acta Oceanologica Sinica 1988年第4期7卷 607-620页

作者： He Dehua, yang guanming, Fang Shaojin,Shen Weilin, Liu Hongbin, Gao Aigen and Huang Shuxin Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China Wenzhou Sub-institute of Fisheries Research Institute of Zhejiang, China China

The studied area is a shallow water area that belongs to the East China Sea continent shelf. The distribution of zooplankton biomass is higher inshore than offshore. The maximum abundance is in the inshore edge of the centre of upwelling, which is the superposed area of the salinity front and temperature front, due to the fact that the mixture of three different waters has brought about a concentration of nutrients. The herbivorous Euphausia, Copepoda and Tunicata are the major groups of the abundant area. Tunicata possess the possibility to compete against other kinds of herbivorous zooplankton. This means that there is negative correlation between the distribution of Tunicata and that of Copepoda and Euphausia. The positions of maximum areas of zooplankton biomass, phytoplankton individual and the concentration of phosphates and chlorophyll-a overlap one another. In the centre of upwelling, zooplankton can not adapt itself to the environment of lower temperature and less oxygen even with rich nutrient

关键词： Study of zooplankton ecology in Zhejiang coastal upwelling system-Zooplankton biomass and abundance of major groups

Assessment of Effects of Qinshan Nuclear Power Station on the Ecological Environment and Water Quality of its Adjacent Waters after its Running

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Marine Science Bulletin 1999年第2期1卷 1-8页

作者： yang guanming, He Dehua, Wang Zhengfang, Wang Chunsheng, Chen Yongshou, Hu Xigang (Second Institute of Oceanography, SOA)

On the basis of the data of biological and nonbiological factors collected respectively from 1989 to 1990 and from 1995 to 1996 in the waters nearby the Qinshan Nuclear Power Station, the ecological environment and water quality of the waters are analyzed and assessed in the paper. The results show: (a) the surveyed area has the typical ecological characteristics of high tidal range estuary, rich nutrients and low biological productivity, (b) tide, runoff and offshore seawater intrusion are the key factors which result in seasonal and annual changes of various biological and non-biological factors, (c) the risking of seawater eutrophication index is resulted from enormous amount of the discharges of industrial and domestic sewage, (d) because the survey area is located in a high tidal-range estuary, thermal effluent from cooling system does not induce significant temperature changes, ( e) the first stage project of Qinshan nuclear power station has no notable impacts on the ecological environment in

关键词： nuclear power station waters ecological environment water quality assessment

HL-3装置上离子回旋波加热对中子产额的影响

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核技术 2024年第5期47卷 1-13页

作者：杨冠铭郝广周卢凌峰董冠岐郝保龙王硕核工业西南物理研究院成都610041

离子回旋射频(Ion Cyclotron Range of Frequencies,ICRF)波加热是托卡马克装置上至关重要的辅助加热方式之一。托卡马克装置中国环流三号(HL-3,原名HL-2M)拟安装加热功率为6 MW的ICRF加热系统。本工作利用TRANSP程序,模拟并研究了ICRF... 详细信息

离子回旋射频(Ion Cyclotron Range of Frequencies,ICRF)波加热是托卡马克装置上至关重要的辅助加热方式之一。托卡马克装置中国环流三号(HL-3,原名HL-2M)拟安装加热功率为6 MW的ICRF加热系统。本工作利用TRANSP程序,模拟并研究了ICRF加热的频率和功率对聚变中子产额以及快离子分布的影响。研究结果表明:ICRF的频率和功率对中子产额有显著影响,固定ICRF频率时,中子产额与加热功率成正比关系,而在固定ICRF加热功率的情况下,中子产额的增加幅度显著依赖ICRF的频率,在研究参数范围内,30 MHz的ICRF对中子产额的增加具有最显著的增强作用。快离子分布的模拟结果显示,在考虑ICRF加热后,中性束和ICRF的协同加热机制能够将快离子加热至最高1 MeV,有效地提高了中子产额。此外,基于中子相机诊断的概念对中子信号进行了仿真。结果表明,中子相机能够有效地测量到由ICRF加热导致的中子产额高低和分布剖面的变化,这为将来优化中子相机诊断系统设计和测量中子空间分布提供了一定的参考。

关键词：离子回旋波聚变中子快离子 HL-3装置