南沙群岛海域水体漫衰减系数Kd(490)的特性研究

对南沙群岛海区水体Kd(490）的特性进行了深入分析和探讨,研究结果表明：Kd（490）的垂直分布与同步测量的海水叶绿素a浓度的垂直分布有很强的相关性;Kd（490）的垂直分布反映出该区域海水存在较强的分层现象,研究中还发现上行辐亮度漫衰减系数KL（490）与Kd（490）垂直变化趋势相当一致,但是以二者达到最大值的深度为界,上层水体的KL（490）值稍大于Kd(490）值,在这一深度以下则相反。     

海洋旅游研究初探

海洋旅游在我国发展迅猛 ,但对海洋旅游的研究明显滞后。就海洋旅游的基本概念、研究范围、特点、开发类型及开发原则等基础理论问题提出了自己粗浅的认识 ,以求引起更多的学者关注这一领域的研究 ,进行更加有益的探讨     

用陆地卫星数据描绘渤海湾海河口区不同污染等级

Okamoto (1969)指出，多变量的主成分具有变差最优性、信息损失最小性、相关最忧性和回归最优性等最优性质，因此多变量的主成分分析被广泛应用于自然科学和社会科学多种领域。由于主成分可以看作所研究的某个复杂事物的一个概括(肯德尔，1975),并可根据主成分所提供的数据，按数值大小排列顺序分级，因此主成分分析也被遥感界应用于区分不同水质(Klemas et al, 1981)。 本文以渤海湾西北部海河、永定新河河口区的陆地卫星数据作主成分分析，以显示河口区海水不同污染等级。同时以河口区各站位实测的多项有机污染数据作主成分变换，按主成分数值大小，将各站位分为不同污染等级。计算表明，遥感数据显示的不同污染等级的地理分布与实测数据是一致的。     

黄渤海海域贝类麻痹性贝毒的检测与分析

采用小白鼠生物测试法和高效液相色谱法对2002~2005年我国黄渤海海域采集的贝类样品进行了麻痹性贝毒毒性检测,结果显示大连海域的虾夷扇贝含有麻痹性贝毒,有毒样品均出现在5月和6月,部分虾夷扇贝样品的毒素含量已经超过食用安全标准。通过高效液相色谱法分析了有毒虾夷扇贝体内的毒素成分,共检出了6种麻痹性贝毒组分,主要以毒性较低的C1和C2毒素为主,GTX3和GTX2次之,STX和neoSTX含量很低。通过高效液相色谱法分析得到的各毒素组分毒性总和与小白鼠生物测试法毒性测试结果基本相当。     

Hydrocarbon Potential of Pre-cenozoic Strata in the North Yellow Sea Basin

The North Yellow Sea Basin ( NYSB ), which was developed on the basement of North China (Huabei) continental block, is a typical continental Mesozoic Cenozoic sedimentary basin in the sea area. Its Mesozoic basin is a residual basin, below which there is probably a larger Paleozoic sedimentary basin. The North Yellow Sea Basin comprises four sags and three uplifts. Of them, the eastern sag is a Mesozoic Cenozoic sedimentary sag in NYSB and has the biggest sediment thickness; the current Korean drilling wells are concentrated in the eastern sag. This sag is comparatively rich in oil and gas resources and thus has a relatively good petroleum prospect in the sea. The central sag has also accommodated thick Mesozoic-Cenozoic sediments. The latest research results show that there are three series of hydrocarbon source rocks in the North Yellow Sea Basin, namely, black shales of the Paleogene, Jurassic and Cretaceous. The principal hydrocarbon source rocks in NYSB are the Mesozoic black shale. According to the drilling data of Korea, the black shales of the Paleogene, Jurassic and Cretaceous have all come up to the standards of good and mature source rocks. The NYSB owns an intact system of oil generation, reservoir and capping rocks that can help hydrocarbon to form in the basin and thus it has the great potential of oil and gas. The vertical distribution of the hydrocarbon resources is mainly considered to be in the Cretaceous and then in the Jurassic.     

渤海南部表层沉积的相特征

通过海上调查及实验室分析,查明渤海南部表层沉积物在结构类型、矿物组合、生物组分及沉积构造等相特征方面具有明显的分区性。渤海南部存在五种沉积相:黄河水下三角洲相、陆架盆地相、海湾相、潮流浅滩相及古滨岸相。黄河水下三角洲相从河口延至水深15—20米处,沉积速率很高,沉积物富含碎屑云母及CaCo_3。陆架盆地相的沉积为粉砂质粘土,具有生物扰动构造。     

闽江河口区湿地生态旅游环境容量研究

本文讨论了生态旅游环境容量的定义及内涵，分析了生态旅游环境容量的特征及构成，在此基础上估算了闽江河口区湿地生态旅游环境容量．结果表明：闽江河口区湿地生态旅游环境容量的限制因子是鳝鱼滩自然保护区生态旅游环境空间容量．鳝鱼滩旅游步行道可分成南路和北路，北路为水路游线，南路为陆路游线．北路游线环境空间日容量为800人次／d，南路游线环境空间日容量为1144人次／d．鳝鱼滩湿地生态旅游环境空间年容量为451202人次／a．这一环境容量可作为闽江河口区湿地生态旅游活动环境容量的最高限制量．     

GeoSwath相干多波束系统原始数据的解析

通过分析GeoAcoustics公司的GeoSwath相干多波束系统的二进制原始文件结构,使用VC 6.0设计出各传感器字段的数据结构,并编程实现相干多波束数据的提取和图形可视化。该技术方法对于GeoSwath系统多波束数据的提取和分析处理有参考意义。     

A note on solitary waves along potential vorticity fronts on anf-plane

The effects of short waves on the propagration of velocity discontinuity along the interface of two uniform potential vorticity, zones on anf-plane is examined. It is shown, using a multiple scale analysis, that the dispersion introduced by the short waves can balance the nonlinear steepening effects predicted by the semigeostrophic theory. The time evolution of a shear disturbance along the front is governed by a Korteweg-de Vries equation. Numerical solutions of the solitary waves along the front are presented.     

Application of the first internal transcribed spacer(ITS-1) of ribosomal DNA as a molecular marker to population analysis in farrer''s scallop Chlamys farreri

Sequence variation of the first internal transcribed spacer of ribosomal DNA （ ITS - 1 ） was examined and its application to the study of genetic variation was explored in four populations of farter＇ s scallop Chlamys farreri. ITS - 1 fragments, with a length of about 300 bp,of 78 individuals collected from Dalian, Qingdao, Yantai in China and Korea respectively were amplified via PCR, cloned and sequenced. Intra-genomic variation was examined by sequencing several clones of single individuals. Alignment and polymorphism analysis detected 44 haplotypes and 50 polymorphic sites which consist of 30 substitutions and 20 indels, indicating a high level of polymorphisms. Sequence analysis also showed a very low level of intra-individual variation. All these features validated the feasibility of application of ITS - 1 fragment to population analysis. Polymorphism analysis showed that the Korea sample has the richest genetic variation, followed by Yantai and Qingdao samples. AMOVA （analysis of molecular variance） showed that the majority （96.26%） of genetic variation was distributed within populations and 3.74% resulted from among populations, but with P 〈 0.05 （ = 0.042）, indicating that the populations in this study have significant divergence. This output was basically concordant with the result arising from RAPD data and different from that from mitochondrial 16S rDNA sequence data. Discussion on this inconsistency was made accordingly.