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1.
The correlation between the azooxantellate scleractinian coral distribution and the abundance of the zooplankton in the Atlantic
Ocean is discussed. The analysis is based on a dataset of 943 specimens (82 species) sampled at 87 stations that were performed
during the scientific cruises of Russian research vessels in the Atlantic. The hypothesis concerning if the coral biodiversity
and population density correlate with the zooplankton abundance was tested. The relationships between these parameters are
contradictory. High coral biodiversity and population density were registered for the areas of low and average zooplankton
abundance in the surface waters. 相似文献
2.
Relationship between the path of the Kuroshio in the south of Japan and the path of the Kuroshio Extension in the east 总被引：2，自引：0，他引：2
A relationship between paths of the Kuroshio and Kuroshio Extension (KE) is investigated, using the satellite-derived altimetry
dataset of 1993–2008. When the Kuroshio takes the nearshore nonlarge meander path or typical large meander path and resultantly
goes through the deeper channel (about 2500 m) of the Izu-Ogasawara Ridge, the KE path adopts a relatively stable state with
the two quasi-stationary meanders. On the other hand, when the Kuroshio takes the offshore nonlarge meander path and then
passes over the shallower part of the Ridge (about 1000 m), the KE path tends to be convoluted, i.e., an unstable state. 相似文献
3.
为研究黄河入海径流变化条件下河口附近海域盐度扩散特征,以更好地保护河口海域生物资源多样性,本文以黄河下游利津水文站的长序列实测径流数据资料为基础,利用近海水动力模型FVCOM,分析径流变化对黄河口海域盐度的影响规律。结果表明：黄河口与莱州湾之间存在顺时针的环流系统,在余流作用以及涨落潮方向的影响下,黄河冲淡水长期向莱州湾扩散;丰水期黄河冲淡水几乎影响了整个莱州湾,27盐度锋可以到达莱州湾中部,27等盐线的表层包络面积为2 665.61 km2,占莱州湾的1/4左右,枯水期低盐度水只有向南扩散的趋势,27以下的低盐度水集中分布在黄河口门附近,27等盐线的表层包络面积只有199.65 km2;5月份,随着入海径流量增加,27等盐线扩散的范围、距离、方向都会发生明显变化。在对近海生物资源有迫切保护需求的情景下,适当减少其他用水户供水量以增加入海生态径流量,可以有效改善黄河口海域附近的盐度情况,为生物资源的生长繁殖创造良好条件。 相似文献
4.
1982年第三次联合国海洋法会议产生了《联合国海洋法公约》,美国积极参与并主导了该《公约》的整个谈判过程,对《公约》大部分条款持支持态度,但最终却没有签署《公约》,其原因主要在于它反对《公约》第十一部分关于深海采矿的规定。1994年《执行(公约)第十一部分的协定》对《公约》中与深海采矿有关的部分进行了实质性修改,满足了美国的利益和要求,但美国国内对《公约》还存在其他一些反对意见。目前美国国内各界支持加入《公约》的呼声日益高涨,美国正在积极考虑加入《公约》。 相似文献
5.
Wei Shouqing 《海洋学报(英文版)》1991,10(3):480-480
A study was made on the polyculture of the red algae Gracilaria tenuistipitata Chang et Xia f. Liui Zhang et Xia, f. nov. , the shrimp Penaeus penicillatus Alcock and the mud crab Scylla serrata (Forskal) . The photosynthesis of the algae produces the oxygen on which the shrimp and the crab breathe. The algae are the reproductive place of the organism for the food of the shrimp and the carb, also is the shelter of the shrimp and the crab. The shrimp and the crab regard the algae as the vegetable 相似文献
6.
射阳县位于江苏沿海中部，东临黄海，拥有海岸线长１０９ｋｍ，滩涂面积７万ｈａ，是江苏省渔业生产重点县之一。“九五”期间，射阳县把发展海洋渔业作为全县经济新的增长点来抓，不断加大开发力度，稳定提高捕捞业，全力突破养殖业，积极发展水产品加工业，取得显著成效，已成为海洋经济发展的先导产业和支柱产业，全县现有各类捕捞船只２０５８艘，总功率为７万多千瓦，海水养殖面积１万多公顷，育苗水体６５万ｍ３，水产品加工库容４０００余吨，年产各类海产品达５５万多吨。然而，在当前近海主要经济鱼类资源急剧衰退，伏季休渔期… 相似文献
7.
Analysis of the sections traversing the polar hydrological front on the shelf of the North-European basin has enabled us to reveal the areas limited by closed isotaches of the sound velocity existing in the interfrontal zone at depths of 50–150 m. These areas represent the closed waveguide which has the property of an underwater sound channel.Translated by Mikhail M. Trufanov. 相似文献
8.
长江、黄河入海沉积物中元素组成的对比 总被引：3，自引：0，他引：3
使用X射线荧光分析仪对取自长江大通站(包括部分南京段)和黄河利津站入海沉积物进行了分析,研究了25种元素的含量特征及它们在长江和黄河里的差异,并与前人研究成果作了比较.研究表明,长江、黄河中的沉积物存在较明显差异,黄河沉积物中明显富集Ca,Sr,Si等元素;长江沉积物中明显富集Al,Fe,Ti,Mn,Cu,Zn,Pb,Rb,P,V等元素.这与2条河流流域的地质背景、气候带特征、风化程度以及人为活动影响关系密切.与前人研究结果相比,2类沉积物中重金属元素的含量有明显增加的趋势,但是用Al标准化之后发现只有部分重金属元素含量有所增加.重金属的变化可能与近年来中国工业快速发展及两河流域污染物质的排放增加有关. 相似文献
9.
Izvestiya, Atmospheric and Oceanic Physics - Analysis of the temporal variations of the virtual heights of the sporadic E layer (h?ES) determined from ionograms with increased accuracy (1... 相似文献
10.
We analyze the components of the carbon system of the Sevastopol bay waters and the balance of main sediment-forming substances
using the data of field investigations in 1998–2008. The interannual variations of total inorganic carbon and the equilibrium
partial pressure of carbon dioxide in the bay water are noted. An increase in the flux of carbon dioxide into the bay and
in the content of organic carbon in bottom sediments is revealed, and an explanation of this phenomenon is given. The priority
accumulation of organic carbon in the sediments of the bay is established. We assess the interannual variation in the relative
abundances of organic and inorganic carbon as an index of the carbon cycle stability. 相似文献
11.
The analysis of the structure of the cryolithozone, facies, and thicknesses of the Quaternary sediments and the results of the physicochemical mathematical modeling of the modern shelf of the western part of the Laptev Sea support the influence of the Late Pleistocene glaciations on the heat conditions and the distribution of the permafrost in the area. A ～200-m thick glacier formed under aerial conditions from atmospheric precipitation represented the metamorphosed snow cover. According to the modeling, the long-living (from 60?50 to 10?4 ky) glacier reduced the thickness of the permafrost rocks in the reviewed shelf area for 280–360 m. The Holocene marine transgression additionally decreased the thickness from 50–140 m on the inner shelf to 220–350 m on the outer shelf. The modern submarine cryolithozone 450-0 m thick is wide-spread in the studied region from the coast to the shelf boundary (isobaths of 130–140 m), where it pinches out at a distance of ～380 km from the coast at a depth of ～250 m above the sea level. 相似文献
12.
This paper analyses the global tendency of the sea level rise (SLR) and its long term influence on the sea level upstream drainage cascade based on the example of the level’s variation in the Vistula Lagoon of the Baltic Sea compared to the other lagoons and coastal regions of the southeastern part of the Baltic Sea. A steady positive trend in the water level variations was revealed; its magnitude varies significantly depending on the time period. In general, during the 100–150 year period, the rate of the SLR in the lagoons and coastal areas of the Baltic Sea (1.7–1.8 mm per year) is close to the SLR rate in the World Ocean. In the second half of the 20th century, the increased rate of the SLR in the lagoons and marine areas became stronger (up to 3.6 mm per year in the Vistula Lagoon and in 1959–2006 in the sea and exceeded the rate of global ocean SLR). It dramatically increased at the end of the last century both in the lagoons and in the sea (up to 10.0–15.0 mm per year). This is the response not only to the global climate warming but it is likely that it is also a response to the changes of the climate driving forces that influence the regimes of the local wind and precipitation in the catchment. 相似文献
13.
入海河口是河流和海洋生态系统的过渡带,陆源生态敏感因素入海将极大地影响近岸海域的生态状况。因此,入海生态敏感因素监测是海岸带生态保护和生态防灾减灾的重要基础,也是促进海洋经济可持续发展的关键一环。然而,当前我国入海河口生态预警监测系统的建立尚处于起步阶段,与发达国家之间还存在较大差距。文章从入海河口生态状况对海域生态系统健康的影响入手,总结了国内外入海河口海洋生态预警监测技术的发展历程、建设情况和应用方向,探讨了建设入海河口生态预警监测站的生态意义和系统发展方向。 相似文献
14.
Impact of the winter cooling on the variability of the thermohaline characteristics of the active layer in the Black Sea 总被引：1，自引：0，他引：1
The influence of the winter atmospheric forcing on the interannual variability of the Black Sea’s active layer’s thermohaline
structure during 1982–2008 is investigated. The results are based on the combined analysis of the hydrological measurements
from a ship, satellite measurements of the sea’s surface temperature (SST), and the NCEP/NCAR reanalysis data for the surface
air temperature (SAT). A high correlation between the variability of the winter mean SST/SAT and the thermohaline characteristics
of the active layer during the following warm season was found. It is shown that the winter atmospheric forcing significantly
affects the variability of the temperature, salinity, and density down to the 150–200 m depth, and this has to be considered
in the analysis of the interannual and long-term variability of the Black Sea’s active layer. 相似文献
15.
A. B. Polonsky 《Physical Oceanography》1995,6(1):51-59
The equation for the turbulence kinetic energy balance as applied to the horizontally-inhomogeneous upper ocean layer encompassing the equatorial zone is analysed. A partial solution of the equation has been derived for the equilibrium conditions. Using the equatorial Atlantic as an example, the prime importance of considering the effect of horizontal heterogeneity in calculating the upper mixed layer thickness is shown.Translated by Vladimir A. Puchkin. 相似文献
16.
V. A. Ivanov S. P. Lyubartseva N. Mikhailova N. B. Shapiro 《Physical Oceanography》2001,11(6):509-524
We analyze the results of numerical calculations performed according to the three-dimensional interdisciplinary model of an
ecological system of the Black-Sea shelf zone near the estuary of the Danube. The complete system of equations of hydrothermodynamics
is solved together with transport equations of the advection-diffusion-reaction type used to describe the transformation of
a substance (nitrogen) between the components of the characteristic vectors of the ecosystem: plankton, detritus, and biogenic
elements (nitrates). We describe the distinctive features of the circumcontinental distribution of components obtained as
a result of numerical experiments and present arguments for the conclusion that the ecosystem of the Danube estuary water
area plays the role of a buffer zone between the press of the Danubian biogenic pollutions and the neighbouring areas of the
shelf zone and open sea.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
17.
K. V. Ushakov T. B. Grankina R. A. Ibraev 《Izvestiya Atmospheric and Oceanic Physics》2016,52(4):365-375
A numerical experiment on the reproduction of the variability in the state of North Atlantic water in 1948–2007 with a spatial resolution of 0.25° has been performed using the global ocean model developed at Institute of Numerical Mathematics, Russian Academy of Sciences (INM RAS), and the Shirshov Institute of Oceanology (IO RAS) (the INM–IO model). The data on the state of the atmosphere, radiation fluxes, and bulk formulas of the CORE-II protocol are used as boundary conditions. Five successive 60-year calculation cycles have been performed in order to obtain the quasi-equilibrium state of a model ocean. For the last 20 years, the main elements of large-scale ocean circulation have been analyzed and compared with the WOA09 atlas data and the results of other models. 相似文献
18.
19.
Numerical experiments with the circulation model of the North Atlantic based on the splitting algorithms in the σ-coordinate system with a spatial resolution allowing for reproducing synoptic eddies were performed in two versions: with the Arctic Ocean and without it (boundary along 78°N). They showed that the account for the water exchange with the Arctic is fundamentally important for reproducing jet dynamics at the western boundary of the Atlantic down to the subtropical zone. The influence of the conditions at the liquid boundary that separates the Atlantic and the Arctic extends not only over the subarctic area [29] but is also “transferred” by the Labrador Current and the Slope Water Current (SWC) to the area of the Gulf Stream proper. One cannot properly describe the detachment of the Gulf Stream from the coast without adequate reproducing of the Labrador Current and SWC. An hypothesis is posed that the location of the detachment region at 35°N is caused by strong vertical motions at the interface between the SWC and the Gulf Stream jet with horizontal velocities that are almost equal to those at the exit from the Florida Strait. A comparison of the model circulation with that retrieved from the hydrological data and the drift of neutral buoyancy floats [14, 22] showed both qualitative and quantitative coincidences of the features of the northward warm water transfer such as the streamline around the so-called northwestern “corner” (motion “along the topography”) and the jet-wise transport of these waters from Labrador to the northeast inside a kind of “pipeline,” which is limited in the upper baroclinic layer 1 km thick by mean velocity contour lines of about 10 cm/s. A comparison between the experimental [19] and model fields of the ocean level showed that, at the absence of direct representation of the water (mass) exchange between the Atlantic and the Arctic Ocean, the decrease of the gradient velocities in the Gulf Stream may reach 30%. 相似文献
20.
海洋生态系统中放射性核素转移的数值模拟 总被引：1，自引：0，他引：1
在西大亚湾海域浓度场分布的基础上,用库室模型分析的观点建立了海洋生态系统库室模型,采用浓集因子法建立了相应的线性方程组,对放射性核素在浮游植物、浮游动物、软体动物、甲壳动物、鱼类以及沉积物中的迁移进行数值模拟。数值模拟结果从一定程度上反映了核电站液态排放对海洋生态系统影响的规律。这为预测核电站废水排放对海洋生态系统的影响提供了一套有价值的参考模型及软件。 相似文献