共查询到20条相似文献，搜索用时 46 毫秒
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白沙湖四角蛤蜊的繁殖期及增养殖效果的研究 总被引：4，自引：0，他引：4
１９９４年１０月－１９９５年９月在汕尾市白沙湖进行了四角蛤蜊的肥满度及生长的周年观察研究，结果表明其肥满度在４．７３％－９．８４％之间，平均为７．０７％，最高值出现在１０月份，最低值在５月份；繁殖盛期主要为９－１２月，其闪为２－３月。其生长与水温及年龄均有密切关系，春夏季生长快，秋冬季生长慢；１－２龄贝生长快，３龄贝生长慢。 相似文献
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岩鹭在厦门海岸带的分布及其生态考察 总被引：7，自引：0，他引：7
岩鹭是我国二级保护鸟类,处于稀有的濒危状态。１９９３年３￣５月,１９９３年９月至１９９４年９月和１９９５年５￣１０月的考察结果。证实岩鹭在厦门的居留时间为１０月上旬至６月上旬。厦门的岩鹭分布于东部海岸,该区域人为干扰和污染少,潮间带底质以砂砾,岩石为主,厦门的岩鹭为灰黑色型,单独活动,种群总数量只有３￣５只,本文根据岩鹭的生态需求、行为习怀和种群数量特点,对岩鹭的保护也进行了讨论。 相似文献
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刘安国 《中国海洋大学学报(自然科学版)》1995,(2)
海洋人物葛利普，Ａ．Ｗ．（Ａｍａｄｅ。ＩｓＷｉｌｌｉａｍＧｒａｂａｔｌ，１８７０．１．９～１９４６．３．２０）美国地质学家、古生物学家。１８７０年１月９日生于威斯康星州塞达堡。１９４６年３月２０日逝世于北京。１８９６年毕业于麻省理工学院。１８９８年获... 相似文献
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来自蓝色国土的报告──中国海洋石油总公司创业记略海天中国海洋石油报社１９９６年９月９日，中国海洋石油总公司在北京举行新闻发布会，王彦总经理向首都传媒发布重大新闻一一我国海上原油年产量突破１０００万吨大关，并估计全年可达到１３００万吨。１１月１８日，又... 相似文献
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文章根据２００２年６—９ 月在浮山湾进行浮游动物的调查,分析了浮山湾浮游动物的种类变化。结果表明：６月,浮游动物２９ 种;７ 月,浮游动物３３ 种;８ 月,浮游动物３１种;９月,浮游动物３１种。这个海域对于浮游动物种类的容量保持稳定,浮游动物种类结构在７月发生比较大的更替变化,出现和消失的物种在每个月的变化基本保持动态平衡。同时,保持不变的浮游动物种类占有浮游动物种类总数的５１％～５８％。因此,浮山湾海域的浮游动物种类结构保持了更替的稳定,为把浮游动物作为饵料的上一级动物提供了稳定的食物来源。 相似文献
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英国北海区域卫星遥感与船测海面温度场的比较 总被引：1，自引：1，他引：1
运用北海研究计划期间（１９８８年９月－１９８９年９月）所采集的海面温度数据与同一期间的ＮＯＡＡ卫星的ＡＶＨＲＲ遥感温度数据，检验由卢瑟福实验提出的ＲＡＬ线性模式反演的海面温度与船测海面温度之间的误差。检验结果表明，误差在０．９℃左右。由此得出结论，ＲＡＬ模式应用于北海这样的小尺度海域并不十分完善（因为这个模式是根据全球大气模式提出的）。因此，有必要利用小尺度海域当地的资料，建立相应的适合于具体海域 相似文献
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永暑礁站风的年内变化特点 总被引：2，自引：0，他引：2
统计分析１９８８年９月至１９９８年８月永暑礁站测风资料,得出该站风的年风变化有常风比非常风大,ＮＥ风比ＳＷ风稳定,平均风速和海气温差与稳定性的关系较密切等特点。 相似文献
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营口市位于辽宁省的中南部,面对渤海的辽东湾,背依鞍山市平原丘陵,东邻辽东崇山峻岭,西接盘锦市沿海平原,有辽河蜿蜒人海,海岸线绵延曲折。由于受海洋、河流的影响．营口市四季分明,气候宜人,蕴藏着丰富的滨海旅游资源,海蚀景观、地质珍迹、人文景观等资源各显异彩;尤其是海水浴场,条件极为优越,与国际上一流的海水浴场相比．毫不逊色,在某些特征上还稍胜一筹。 相似文献
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A. P. Tolstosheev 《Physical Oceanography》2009,19(6):358-365
A method for the estimation of the results of reconstruction of the trajectories of drifting buoys is proposed. It is based
on the comparison of the estimates of power spectral densities for the components of current velocity computed according to
three data sets: the data set of the coordinates of a drifting buoy with a built-in GPS receiver, the data set of coordinates formed on the basis of the first set but with data missing and observational errors
corresponding to the actual trajectory measurements by the Argos satellite location and data collection system by the Doppler method, and the data set of coordinates obtained as a result
of interpolation of the second set. As an example, we consider the procedure of realization of the proposed method and demonstrate
the efficiency of its application for the improvement of the reliability of reconstruction of the trajectories of drifting
buoys. 相似文献
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An attempt has been made to estimate the fishery potentials of the EEZ of India on the basis of data on primary and secondary production. The total column primary production and zooplankton production have been calculated to be 265·9 and 9 million tonnes of carbon per year, respectively. From these values the fishery potential has been estimated as 2·5 million tonnes per year. To this, if we add the estimated demersal fish catch, being 1·2 million tonnes per year, the total potential yield comes to 3·7 million tonnes per year. Since the present average total catch is about 1·6 million tonnes in a year, the fish catch could be doubled. 相似文献
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1992年，联合国21世纪议程提出了综合管理的概念，并认为它是海岸管理的最重要目标，而海岸管理的目的就是改进业已存在的管理实践的效率和效果。在21世纪议程的实施过程中，沿海国家面临着巨大的困难，即：为了使综合管理在实践中具有可操作性而建立适合的政府机构。韩国正是在国家范围和次一级区域进行这项工作的实验场所。这项工作的最重要成就是在1996年成立了具有综合协调各涉海部门职能的韩国海洋事务与渔业部（MOMAF）。这篇文章的内容主要来自于这些观察，即韩国政府为建立海岸带综合机制而进行了各种努力，特别是1992年联合国环发大会召开后到1997年初海洋事务与渔业部成立了海岸带管理处这段时间里开展的各种工作，文章重点在于评价在建立海岸带综合机制的过程中综合的概念是如何被应用并被挑战的。文章提出了在东亚地区沿海国家开展合作的可能区域的建议。 相似文献
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天然气水合物地球化学特征 总被引：4，自引：0，他引：4
天然气水合物是在低温、高压以及有足够气体供应条件下形成的一种天然气(主要为甲烷)与水组成的似冰状固态化合物。天然气水合物中包含的甲烷碳是全球甲烷资源的重要组成部分,是一种数量巨大的潜在能源[1]。而且由于甲烷的温室效应,天然气水合物分解释放的甲烷进入大气中会严重 相似文献
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I. E. Timchenko A. A. Primalenny V. D. Yarin E. F. Vasechkina E. M. Igumnova 《Physical Oceanography》2001,11(4):367-378
We use many-year archival observations of hydrologic and hydrobiologic state of the Sea of Azov for the identification of
the structure of a model of its ecosystem. The ecosystem model, supplemented with expert estimates of bioresource consumption
(fish reserve), contamination level, and possible ecologic fines for violation of the sea natural state, is formalized by
the method of system dynamics. Hereat, the major part of influence functions is found in terms of observational data with
application of self-organization algorithms. We also present the results of simulated experiments with the model of the ecosystem,
which enable us to analyse scenarios of its behaviour under the influence of various external factors (wind, river discharge,
water exchange with the Black Sea, etc.).
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
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Values of root mean square slope 0 and its variations -0 are estimated using the brightness field of an image of the surface of the sea near a speck of light. When 0 and -0 are defined it is highly important to take into account direct as well as dissipated solar radiation.The space-time analysis of the structure of the image brightness field is performed. This gives an opportunity to estimate dispersion relationship and the running effect of a brightness contrast packet. Comparison of the parameters obtained with the theoretical dispersion ratio of internal waves (IW) allows one to make a conclusion that IW surface manifestations are recorded in a frame.UDK 551.463.5 相似文献
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Yu. D. Chashechkin 《Physical Oceanography》2011,20(5):317-324
The methods of perturbation theory and integral representations are used to analyze the general properties of a system of
equations of the mechanics of inhomogeneous fluids including the equations of momentum, mass, and temperature transfer. We
also consider various submodels of this system, including the reduced systems in which some kinetic coefficients are equal
to zero and degenerate systems in which the variations of density or some other variables are neglected. We analyze both regularly
perturbed and singularly perturbed solutions of the system. In the case of reduction or degeneration of solutions, the order
of the system decreases. In this case, regularly perturbed solutions are preserved (with certain modifications) but the number
of singularly perturbed components participating in the formation of the boundary layers on contact surfaces and their analogs
in the bulk of the fluid, i.e., the elongated high-gradient interlayers, decreases. The interaction between all components
of the currents is nonlinear, despite the fact that their characteristic scales are different. 相似文献