屺姆岛附近海区波浪特征分析     

酆鉴章 《海岸工程》1988,(3)

本文根据屺坶岛站长期波浪观测资料和有关寒潮、台风资料,分析了该区的波浪状况。对波型特征,各向波浪统计量的特点和波浪的季节特点等问题进行了讨论。推算了五个方位的不同重现期、不同累积率的设计波高和不同重现期的平均周期。针对大浪、巨浪来自偏北向的特点和产生偏北大浪主要由寒潮和台风天气过程,讨论了寒潮天气过程引起的大风、大浪特点,总结了影响该区台风路径特点以及由它影响产生偏北大风、大浪特点。  相似文献   

胶州湾风浪预报方法的探讨     

酆鉴章 《海洋科学进展》1986,(2)

一、概述在海岸工程中,波高和周期是两个考虑的重要参数。然而,这两个参数对多数海区不得不靠后报获得。因此,研究可靠的预报(或后报)方法是很重要的问题。风是形成风浪的直接动力,长期以来,人们在研究风与浪的关系中,提出了许多半理论、半经验的或纯经验的预报模式。对于开阔海域深水风浪而言,目前国外多采用与实际符合较好的  相似文献   

Cloning of a chub metallothionein cDNA and development of competitive RT-PCR of chub metallothionein mRNA as a potential biomarker of heavy metal exposure   总被引：3，自引：0，他引：3  

Hayes RA  Regondi S  Winter MJ  Butler PJ  Agradi E  Taylor EW  Kevin Chipman J 《Marine environmental research》2004,58(2-5):665-669

Metallothionein has been assayed in a range of aquatic animal tissues as an indicator of metal exposure. We sequenced chub (Leuciscus cephalus) metallothionein cDNA which showed over 90% homology to common carp, goldfish and stone loach and 77% homology to rainbow trout sequences for metallothionein. We then used the extended primer method to develop an accurate quantitative competitive RT-PCR assay for metallothionein mRNA. RT-PCR was used to measure metallothionein mRNA in feral chub from a range of field sites, with different levels of heavy metal pollution, in the West Midlands, UK. Measurements were complemented by analysis of liver and gill metallothionein protein by capillary electrophoresis. There was no significant difference in the metallothionein protein levels between fish of different rivers and there was no evidence of elevation of mRNA at the sites of highest metal exposure. The level of metal exposure (e.g. zinc, nickel and cadmium each ranging between 15 and 28 microg/l ) at the pH (7.5-8.5) of these rivers appears insufficient to elevate hepatic or gill metallothionein in chub. A lack of elevation of hepatic metallothionein mRNA in chub exposed to zinc, copper and manganese for 24 h and 10 days in the laboratory also suggests a non-responsiveness of this species.  相似文献   

沙捞越滨海区巴林坚省D18油田详细储油层地质研究的应用     

Almond  J 程志军 《海洋地质》1993,(4):82-97

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烟台地区海陆风特点   总被引：2，自引：0，他引：2  

仲伟民 《海洋通报》1993,12(3):26-29

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第23章 DNS模式:一种为大洋波浪预报而改进的谱模式     

J.H.Auender  T.P.Barnett  M·Lybanon 《海洋预报》1989,(Z1)

23.1 介绍 模拟与频率和方向相关的大洋波谱F（f,θ）的工作是极其困难的。唯一有点统一的理论（Hasselmann,1967）也还没有简化成一种实用形式。这篇研究中所探讨的是结合零散的,现有的理论,以达到这样一种目的:即发展一种与我们目前对风浪成长谱的了解相一致 ·95.的波谱模式。本章中我们将讨论一种离散的谱模式,这种模式采用了一种改进的能量传播的特征方法。数值方法最早是由Barnett等（1969）提出的。  相似文献   

澳大利亚海岸概况     

D.沃克  J.沙贝尔 《热带海洋学报》1983,(2)

澳大利亚是个大陆岛,界于南纬11°—43°,东西长5000公里,面积约770万平方公里(包括塔斯马尼亚岛等)。她与南极大陆隔以3000公里的海域。在澳大利亚和亚洲大陆之间有一列岛屿,其中新几内亚位于与澳大利亚相同的大陆架上,在第四纪时通常是相连的。  相似文献   

利用浮标测波造成的波形畸变及其漂移     

王镐章 《海洋技术学报》1984,(1)

加速度计测波浮标已被广泛采用,但这种测波方式并非最理想的。同时对其存在的漂移原因也众说纷纭。本文的目的在于探讨采用浮标测波在原理上的误差,以及在理论上分析造成加速度计测波浮标输出存在的波形漂移和畸变的原因及其必然性。并根据变化规律可以找到消除或减少误差的方法。从而希望能对测波仪的研制提供帮助。  相似文献   

Bioaccumulation of trace metals in the Antarctic amphipod Orchomene plebs: evaluation of toxicokinetic models     

Kahle J  Zauke GP 《Marine environmental research》2003,55(5):359-384

Bioaccumulation of Cd, Co, Cu, Ni, Pb and Zn in Antarctic gammaridean amphipod collectives, Orchomene plebs (Hurley, 1965), was investigated during a cruise of RV "Polarstern" to the Wedell Sea. With the sole exception of Cd the organisms accumulated metals during exposure and depurated them in uncontaminated seawater. Four independent toxicokinetic experiments and one field study were modelled simultaneously to calculate the following size-dependent bioconcentration factors for organisms with body length 10 mm (BCF(10 mm)): 130 (Co), 4030 (Cu), 190 (Ni), 2900 (Pb), and 5210 (Zn). On the time scale of our experiments the data suggest an increased metal uptake by previously exposed test organisms. The collectives investigated may be regarded as potentially suitable biomonitors for Co, Cu, Ni, Pb and Zn but not for Cd. An approach to evaluate the sensitivity of Orchomene plebs as a biomonitor of waterborne metals in the field indicates minimal increments of the ambient exposure concentrations of 0.01 microg Co l(-1), 0.2 microg Cu l(-1), 0.4 microg Ni l(-1), 0.6 microg Pb l(-1) and 0.3 microg Zn l(-1).  相似文献   

Induction of vitellogenin in vivo and in vitro in the model teleost medaka (Oryzias latipes): comparison of gene expression and protein levels   总被引：5，自引：0，他引：5  

Scholz S  Kordes C  Hamann J  Gutzeit HO 《Marine environmental research》2004,57(3):235-244

Quantification of the egg yolk precursor vitellogenin (VTG) in fish has become a standard technique to detect estrogenic effects of known chemicals and environmental samples. In the present study, we have analysed VTG induction by estradiol, ethynylestradiol and genistein exposure in the model teleost medaka (Oryzias latipes) and demonstrate that the medaka is a suitable model system to analyse estrogenic effects. By comparing VTG gene expression and protein levels we show that in principal both techniques can be used to study VTG induction in vivo (juvenile and adult males) and in vitro (primary cultures of male liver cells). If a short term in vivo or in vitro exposure is performed, detection of mRNA might be sufficient. For long term studies with the need to detect weak estrogenic chemicals and a precise quantification, immuno-chemical detection may be favoured.  相似文献