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The effects of the environmental factors on Laminaria disease caused by alginic acid decomposing bacteria

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Acta Oceanologica Sinica 1992年第1期11卷 123-130页

作者： Ding Meili institute of oceanology, Academia Sinica, Qingdao 266071, China

-The rot disease of Laminaria occurs often in nurseries of sporeling and commercial cultivation in the sea and results in economic loss greatly. Usually the disease outbreaks accompanied with massive multiplication of alginic acid decomposing bacteria. From the section of the decaying Lamuutria which resulted from the inoculation of alginic acid decomposing bacteria, it was observed that the bacteria invaded the epiderm of the Laminaria surface at first, then entered the ex-odermis, endodermis and pith. In addition, there were a great amount of bacteria in the intercellular region and a lot of free cells of the algae in the decaying areas. The wall of some free cells was decomposed, which led to soft tissue or disintegration. Alginic acid decomposing bacteria are normal epiphytic microorganisms growing on Lamuutria surface. These bacteria do not cause disease at normal environmental conditions. The experiments showed that the unfavourable conditions, e. g. , wounding, overcrowding, high temperature reduced the ability of antibacterial activity and made the algae more susceptible to the pathogens and favoured the multiplication of alginic acid decomposing bacteria and finally led to the disease outbreak. The unfavourable environmental factors which resulted from a variety of reasons were the main cause of the disease.

关键词： The effects of the environmental factors on Laminaria disease caused by alginic acid decomposing bacteria acid

MAJOR FEATURES OF WARM AND COLD EDDIES SOUTH OF THE NANSEI ISLANDS

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Chinese Journal of oceanology and Limnology 1983年第3期1卷 248-257页

作者： Guan Bingxian (institute of oceanology, Academia Sinica, Qingdao) 1. institute of oceanology Academia Sinica Qingdao

As regards the eddies occurring in the origination region of the Kuroshio (west of 130° E), the earliest informations were reported by R. Shigematsu (1932) and K. Koenuma (1936) respectively. From the data observed in the twenties, they pointed out that there was a warm eddy located to the right side of the Kuroshio in the Luzon Strait. Using the data obtained from the fourties through the sixties, Nitani further convinced the existence of the warm eddy. During the latest two decades, observations of the area south of the Nansei Islands on board of R/V Chofu Maru (1965, ’66, ’67) and Hakuho Maru (1974, ’75) also revealed the existence of warm and cold eddies, but few works on 'eddies' are reported, so far as we know.

关键词： MAJOR FEATURES OF WARM AND COLD EDDIES SOUTH OF THE NANSEI ISLANDS

A FINITE ELEMENT METHOD FOR COMPUTATIONAL FLUID DYNAMICS WITH APPLICATION TO TIDAL CALCULATION OF THE BOHAI SEA

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Chinese Journal of oceanology and Limnology 1983年第3期1卷 285-296页

作者： Wu Jianghang, Yu Tianchang~(1)) and Tang Shimin (Department of Mechanics, Beijing University) institute of oceanology, Academia Sinica, Qingdao. 1. Department of Mechanics Beijing University Beijing China

The finite element method is art established numerical technique which now enjoys a widespread use in solid and structural mechanics. The main attributes are its fairly wide flexibility in handling very complex geometrics, its rich mathematical structure in developing efficient and accurate elements and its advantages of having to satisfy only the essential boundary conditions. It is effective, especially in the case where the domain is not regular.

关键词：月卜 Flow

Genesis of ^(230)Th excess in basalts from mid-ocean ridges and ocean islands:Constraints from the global U-series isotope database and major and rare earth element geochemistry

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Science China Earth Sciences 2010年第10期53卷 1486-1494页

作者： ZHANG GuoLiang1,2 & ZENG ZhiGang1 1 Key Laboratory of Marine Geology and Environment,institute of oceanology,Chinese Academy of Sciences,Qingdao 266071,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 1. Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China

Based on 230Th-238U disequilibrium and major element data from mid-ocean ridge basalts(MORBs) and ocean island basalts(OIBs),this study calculates mantle melting parameters,and thereby investigates the origin of 230Th excess.(230Th/238U) in global MORBs shows a positive correlation with Fe8,Po,Na8,and Fmelt(Fe8 and Na8 are FeO and Na2O contents respectively after correction for crustal fractionation relative to MgO = 8 wt%,Po=pressure of initial melting and Fmelt=degree of melt),while 230Th excess in OIBs has no obvious correlation with either initial mantle melting depth or the average degree of mantle ***,compared with the MORBs,higher(230Th/238U) in OIBs actually corresponds to a lower melting *** suggests that the 230Th excess in MORBs is controlled by mantle melting conditions,while the 230Th excess in OIBs is more likely related to the deep garnet *** vast majority of calculated initial melting pressures of MORBs with excess 230Th are between 1.0 and 2.5 GPa,which is consistent with the conclusion from experiments in recent years that DU>DTh for Al-clinopyroxene at pressures of >1.0 *** initial melting pressure of OIBs is 2.2-3.5 GPa(around the spinel-garnet transition zone),with their low excess 226Ra compared to MORBs also suggesting a deeper mantle ***,excess 230Th in MORBs and OIBs may be formed respectively in the spinel and garnet stability *** addition,there is no obvious correlation of K2O/TiO2 with(230Th/238U) and initial melting pressure(Po) of MORBs,so it is proposed that the melting depth producing excess 230Th does not tap the spinel-garnet transition *** and MORBs in both(230Th/238U) vs.K2O/TiO2 and(230Th/238U) *** plots fall in two distinct areas,indicating that the mineral phases which dominate their excess 230Th are ***/Yb-Ce curves of fast and slow ridge MORBs are similar,while,in comparison,the Ce/Yb-Ce curve for OIBs shows more influence from *** mechanism

关键词： excess 230Th clinopyroxene garnet spinel-lherzolite mid-ocean ridge ocean island

GEOCHEMISTRY OF SOME ELEMENTS IN SEDIMENTS OF THE EAST CHINA SEA

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Journal of oceanology and Limnology 1983年第2期1卷 210-220页

作者： Zhao Yiyang (institute of oceanology,Academia Sinica) 1. institute of oceanology Academia Sinica Qingdao China

The East China Sea is noted for its vast continental *** marine geology ofthe East China Sea has been extensively studied for many *** data concerningthe seabed sediments have been published by many investigators,whereas geochemical studieson the sediments have been comparatively few.200 samples of different types of sedi-ments were analyzed to find out the geochemical characteristics of some major and traceelements in the sediments of the East China *** elements determined are Fe,Mn,Ti,P,Si,Cu,Co,Ni,Zn,B,Zr,U,Th,Ra and REE(total rare earth elements).Fe,Mn,Ti,P,B,Zr,U,Th and REE were determined by ordinary colorimetry,Cu,Co,Ni

关键词： Cu Ra Zr Ni EAST OC

Turning mechanism problems of the Changjiang River diluted water

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Acta Oceanologica Sinica 1992年第3期11卷 317-329页

作者： Zhao Baoren institute of oceanology, Academia Sinica, Qingdao 266071, China

Some main ideas about the turning of the Changjiang River diluted water (CDW) and their deficiencies are reviewed in this paper. According to a large number of observation data it is pointed out that the turning phenomena of the CDW are related not only to the discharge of the Changjiang River but also to the sea surface slope and wind stress curl in the southeast coast of China. Exsistence of the sea surface slope reflects essentially the effect of the Taiwan Warm Currc (TWC) on the turning of the CDW.

关键词： In area Wang Turning mechanism problems of the Changjiang River diluted water

A combined numerical tidal model for the Hangzhou Bay and Qiantang River

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Acta Oceanologica Sinica 1989年第4期8卷 485-496页

作者： Cao Deming and Fang Guohong institute of oceanology, Academia Sinica, Qingdao, China Inst oceanology Academia Sinica Qingdao China China

-In order to avoid prescribing open boundary condition on the upstream side of the Hangzhou Bay, in numerical simulation of the tides and residual currents of the Bay, a 1-D model for the Qiantang River is connected to the 2-D model for the Hangzhou Bay. The harmonic constants of diurnal constituent [ (K1+O1)/2],semidiurnal constituent (M2) and shallow water constituent (M4) are obtained. The results produced by the combined model are in better agreement with the observed ones than those produced solely by the original 2-D model. The combined model gives much more reliable results for tide-induced residual water level and current.

关键词： A combined numerical tidal model for the Hangzhou Bay and Qiantang River Bay

INFLUENCES OF WIND ON VERTICAL STRUCTURES OF TEMPERATURE AND SALINITY, AND UPWELLING OFF ZHEJIANG COAST IN SUMMER

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Journal of oceanology and Limnology 1985年第1期3卷 109-117页

作者： Ding Zongxin (institute of oceanology, Academia Sinica, Qingdao) 1. institute of oceanology Academia Sinica Qingdao

In this paper the influences of short-term wind on vertical structures of temperature and salinity, and the upwelling off the Zhejiang coast are studied on the basis of hydrographic data and wind near the coast in Summer (1959-1979). It is pointed out that the variations of vertical distributions of temperature and salinity, and upwelling in this region are closely related to short-term (several days to a week) variation of wind observed. The occurrence of double thermocline, a special oceanographic phenomenon, is partially related to unstable SSW wind field. SSW and NE winds in June are two (dynamic factors making intermediate warm water form or disappear.

关键词： INFLUENCES OF WIND ON VERTICAL STRUCTURES OF TEMPERATURE AND SALINITY AND UPWELLING OFF ZHEJIANG COAST IN SUMMER

Influence of the earth rotation on the interfacial wave solutions and wave-induced tangential stress in a two-layer fluid system

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Acta Oceanologica Sinica 2009年第2期28卷 115-120页

作者： SONG Jinbao LIU Yongjun institute of oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Ocean Circulation and Waves （KLOCAW） Chinese Academy of Sciences Qingdao 266071 China Graduate University of Chinese Academy of Sciences Beijing 100039 China

Interfacial waves and wave-induced tangential stress are studied for geostrophic small amplitude waves of two-layer fluid with a top free surface and a fiat bottom. The solutions were deduced from the general form of linear fluid dynamic equations of two-layer fluid under the f-plane approximation, and wave-induced tangential stress were estimated based on the solutions obtained. As expected, the solutions derived from the present work include as special cases those obtained by Sun et al. （2004. Science in China, Ser. D, 47（12）： 1147-1154） for geostrophic small amplitude surface wave solutions and wave-induced tangential stress if the density of the upper layer is much smaller than that of the lower layer. The results show that the interface and the surface will oscillate synchronously, and the influence of the earth＇s rotation both on the surface wave solutions and the interfacial wave solutions should be considered.

关键词： two-layer fluid interfacial waves wave-induced tangential stress earth rotation