蒽胁迫对2种海洋微藻的毒性效应     

田继远  唐学玺  于娟  王晨  刘文明 《中国海洋大学学报(自然科学版)》2002,32(6):919-925

采用水生毒理学方法以及通过分析蒽对 2种海洋微藻的几种生理生化指标的影响 ,初步研究了蒽胁迫对 2种海洋微藻的毒性效应。结果表明 :随着蒽浓度的不断增大 ,1 2种海洋微藻的相对增长率逐渐降低 ,叶绿素 a和类胡萝卜素含量稍有下降 ,蒽对小新月菱形藻生长的 72 h· EC50为 2 51μg· L-1 ,蒽对亚心形扁藻生长的 72 h· EC50 为 387μg· L-1 ;2还原型谷胱甘肽 (GSH)含量逐渐降低 ;3加入外源性抗氧化剂 (GSH和甘露醇 )可缓解蒽胁迫所造成的 2种海洋微藻的细胞密度的降低 ,即可缓解蒽胁迫对微藻的毒害作用  相似文献   

Modelling of the spectral characteristics of the wind wave envelope     

Yu. P. Solov'ev 《Physical Oceanography》1990,1(3):193-201

A method applied for the determination of the statistical characteristics of the wind wave envelope is considered. It is shown that the correlation function envelope for a normal random process defines the basic properties of the process envelope and it can be expressed through the spectrum width. No limitations are imposed on the form or the width of the spectrum. The model is effective for a developing and steady sea disturbance when the attenuation of the temporal correlation function can be approximated by an exponent. Numerical computations and experimental results for typical cases of sea disturbance are compared.Translated by Mikhail M. Trufanov.  相似文献   

长江口及济州岛附近海域变性水团的初步分析   总被引：1，自引：0，他引：1  

喻祖祥  苏育嵩  俞光耀  李凤岐 《中国海洋大学学报(自然科学版)》1989,(Z1)

基于变性水团的概念,本文把聚类分析用于确定长江口及济州岛附近海域变性水团的边界。由聚类分析得到的结果表明,在该海区有十个水团。对它们的特征、分布与变化进行了初步分析。作者得出的结论是:1、在十个水团中,有四个大洋性水团,六个变性水团。2、该海域水团变性的特点为暧季增温、降盐、降氧,而冷季则相反。3、水团变性是由海区内、外因素综合作用而发生的,而后者在浅水区域起主要作用。4、水团边界的舌状分布与流向之间有明显关系。因之,海流的方向及强度,大致可依水团舌状分布而判断。5、底层中心渔场基本上位于各变性水团之间的混合区或其附近。  相似文献   

Relationship between the anomalies of temperature and air pressure over the ocean     

S. G. Boguslavsky  S. I. Kazakov  Yu. P. Krasovsky 《Physical Oceanography》1994,5(5):359-367

This paper considers the relationship between multi-year air temperature and pressure fluctuations over the ocean, based on an approximate solution of the problem on the determination of large-scale seawater temperature anomalies from the conditions predominating at the sea surface. The dependence derived is numerically analysed using observations made in the North Atlantic. It is shown that the variability of annual mean air temperature anomalies is largely controlled by the air pressure field which has taken place during the preceding long-term period. The dependence derived may be applied to generate long-term forecasts of the ocean's hydrometeorological regime.Translated by Vladimir A. Puchkin.  相似文献   

Numerical simulation of convective clouds developing in the atmosphere in emergency situations (explosions,fires)     

N. E. Veremei  Yu. A. Dovgalyuk  E. N. Stankova 《Izvestiya Atmospheric and Oceanic Physics》2007,43(6):731-744

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Variations in the sedimentation in Kara Bogaz Gol Bay related to sea level fluctuations during the Novocaspian time     

Yu. A. Karpychev 《Oceanology》2007,47(6):857-864

The structure of the bottom sediments in Kara Bogaz Gol Bay is correlated with the history of the sea level fluctuations in the Caspian Sea during the Novocaspian time based on the radiocarbon geochronology of the coastal and bottom sediments. Instrumental observations of the sea level and the hydrochemical regime of the bay are considered to substantiate the correlations obtained.  相似文献   

Electronic atlas of the Russian Arctic coastal zone     

D. S. Drozdov  F. M. Rivkin  V. Rachold  G. V. Ananjeva-Malkova  N. V. Ivanova  I. V. Chehina  M. M. Koreisha  Yu. V. Korostelev  E. S. Melnikov 《Geo-Marine Letters》2005,25(2-3):81-88

A set of digital maps including geology, Quaternary sediments, landscapes, engineering-geological, vegetation, geocryological and the series of regional sources have been selected to characterize the Russian Arctic coast. Based on this data, new maps of engineering geocryological zoning and zoning of the coast with respect to the intensity of exogenous geological processes and risk of technogenic impacts have been generated at the scales of 1:4,000,000–1:8,000,000. These maps are a tool to assess the impact of industry on the Arctic coast of the country.  相似文献   

Third international conference on “Current Problems in Optics of Natural Waters” (ONW’2005)     

I. M. Levin  O. V. Kopelevich  V. Yu. Osadchii 《Oceanology》2007,47(1):141-143

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Study of the seawater transparency field in the Crimea-Caucasus shelf area     

E. A. Agafonov  N. A. Sorokina  Yu. A. Prokhorenko  E. E. Pavlova 《Physical Oceanography》1995,6(5):395-397

This paper discussesin situ observational data on the directed light attenuation index in the near-surface layer, collected in September 1987. The absolute light attenuation index has been evaluated for a near-shore strip of water 10–15 miles in width. When multidisciplinary research is conducted in the open sea, this part of the sea surface remains unstudied, as the observational grid for it is made larger than the spatial-temporal parameters of the biophysical processes producing optical inhomogeneities.Translated by Vladimir A. Puchkin.  相似文献   

The influence of the gulf’s geometry on seiche oscillations in an enclosed basin     

Yu. V. Manilyuk  L. V. Cherkesov 《Physical Oceanography》1997,8(4):217-227

The finite-elements technique is applied to study the effect of a basin’s geometry (bays, harbours) and location of the characteristics of seiche oscillations in the basin and in the gulf proper. An increase of the length of the bay is shown to contribute to the periods of natural oscillations and to cause their restructuring. Translated by Vladimir A. Puchkin.  相似文献