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1.
Distribution of Pacific-origin water in the region of the Chukchi Plateau in the Arctic Ocean in the summer of 2003 总被引：6，自引：1，他引：6
1Introduction Besidestheprecipitationandriverdischarges,the watersinthePacificOceanandtheAtlanticOceanare thesourcesoftheArcticOceanwater.TheAtlantic waterenterstheArcticOceanviatheFramStraitand theBarentsSea.Foritsdenserfeatureduetohigh salinity,mostofitsinkstothenorthofSvaldbardand circulatesinallthedeepbasinsintheArcticOcean, formingthedeepandbottomwatersoftheArcticO- cean(Aagaardetal.,1985;Rudelsetal.,1999).The BeringStraitistheonlychannelforthePacificwater toflowintotheArcticOce… 相似文献
2.
1 IntroductionTheBeringStrait, with them aximum depth lessthan 60 m , isthe uniquepassagebetween the ArcticOcean and the North Pacific Ocean, and links twoshelfseas:theBeringSeainthesouthandtheChukchiSea in the north. The background flow field oftheBering… 相似文献
3.
The study was made by observing the annual change of the gonadal development of amphioxus in Xiamen cohtinuously for two years from November, 1986 to November, 1988. We determined the gonadal diameter, gonadosomatic index of each amphioxus, and observed the histological characteristic of the gonadal development of the female and male by cut section, which provided the basis for dividing the stages gonads and the determining level of the gonadal development of amphioxus in each month. 相似文献
4.
The materials were obtained from the survey conducted in the Kuroshio area of the East China Sea to the Southwest of Kyushu in Japan (29°30'-32°00', 128°00'-130°'00'E) on board the R. V. Yoko Maru of Seikai Regional Fisheries Lab, Fisheries Agency, Japan in June 15~28, 1988 during China-Japan Joint Research on the Kuroshio. Zoo-plankton was collected by means of the North Pacific Net with model TSK flowmeter through vertical haul from 50 -Om. Temperature and salinity were measured with CTD. 134 species (including 4 spp. ) of planktonic copepods were preliminarily identified in the survey area. Most of them belonged to the tropical and subtropical species and a few of them were the warm-temperate species and eurytopic species. The main dominant species vteieOncaea venusta, Oithona plumifera, Clausocalanus furcatus, C. Arcuicornis, Paracaianus dculeatus, Oithona similis, Temara turbinata, Oncaea media, Undinula danvinii, Acartia negligent, Corycaeus speciosus, Scolecithrix danae, etc. The total number 相似文献
5.
A. I. Ryabinin Yu. A. Mal’chenko L. V. Saltykova E. A. Danilova S. A. Bobrova 《Physical Oceanography》2011,21(2):115-128
We study the space-and-time variability of the concentrations of 27 microelements (Sc, Cr, Mn, Fe, Ni, Co, Cu, Zn, As, Mo,
Ag, Cd, Sn, Se, Sb, Ba, La, Ce, Sm, Eu, Tb, Hf, Hg, Pb, Au, Th, and U) and Sr in the sea, river, and waste waters of the South
Coast of Crimea in 2002–2007. Parallel with the data about elements studied earlier, we present, for the first time, the data
of investigations of the contents of rareearth elements (Lu, Nd and Yb) whose concentrations in the major part of the analyzed
samples of seawater were lower than the limit of their quantitative determination. We present the ranges of the concentrations
of elements and perform their comparison with the data of the previous period of monitoring. 相似文献
6.
Preliminary study of the retention mechanism of planktonic copepods in the Jiulong Estuary in China 总被引：1，自引：0，他引：1
The horizontal and vertical distribution patterns of five planktonic copepods,Calanus sinicus, Acartia pacifica, Tortanus derjugini, Acartiella sinensis and Pseudodiaptomus poplesia, predominant in the Jiulong Estuary, were investigated from May 2003 to April 2004. The results showed that the distribution of these copepods was related to the tidal period but that each species had its own specific pattern. C. sinicus showed no tidal vertical migration behavior and was thought to be a non-resident species in this estuary. Among Acartia pacifica,T. derjugini,Acartiella sinensis, more individuals occurred in the surface than in the bottom waters during flood tide, and the pattern was reversed during ebb tide. The epibenthic copepod P. poplesia usually remained in the bottom waters in the upstream part of the estuary, but it displayed strong tidally-oriented vertical migration in the middle reaches of the estuary.Taking into account the hydrographic characteristics of the Jiulong Estuary,it was hypothesized that the planktonic copepods in this estuary had more or less adopted the mechanism of vertically migrating to the surface waters during flood tide in order to make use of the inflowing tide, and then sinking to the bottom during ebb tide to avoid being carried out of the estuary by net outflow. 相似文献
7.
ＡｐｐｌｉｃａｔｉｏｎｏｆｔｈｅｆｏｕｒｍｏｄｅｌｓｏｆｄｉｒｅｃｔｉｏｎａｌｓｐｅｃｔｒａｉｎｔｈｅＢｏｈａｉＳｅａ￥ＷｕＸｉｕｊｉｅａｎｄＴｅｎｇＸｕｅｃｈｕｎ（ＦｉｒｓｔＩｎｓｔｉｔｕｔｅｏｆＯｃｅａｎｏｇｒａｐｈｙ，ＳｔａｔｅＯｃｅａｎｉｃＡ... 相似文献
8.
Ｔｈｅａｐｐｌｉｃａｔｉｏｎｏｆｔｈｅｆｒａｃｔａｌｇｅｏｍｅｔｒｙｉｎｔｈｅｓｔｕｄｙｏｆｓｅａ－ｆｌｏｏｒｖｏｌｃａｎｏＴａｏＣｈｕｎｈｕｉ，ＪｉｎＸｉａｎｇｌｏｎｇ，ＬｕＷｅｎｚｈｅｎｇａｎｄＨｕａＺｕｇｅｎ（ＲｅｃｅｉｖｅｄＯｃｔｏｂｅｒ４，... 相似文献
9.
The Pelotas Basin is the classical example of a volcanic passive margin displaying large wedges of seaward-dipping reflectors (SDR). The SDR fill entirely its rifts throughout the basin, characterizing the abundant syn-rift magmatism (133–113 Ma). The Paraná–Etendeka Large Igneous Province (LIP), adjacent to west, constituted the pre-rift magmatism (134–132 Ma). The interpretation of ultra-deep seismic lines showed a very different geology from the adjacent Santos, Campos and Espírito Santo Basins, which constitute examples of magma-poor passive margins. Besides displaying rifts totally filled by volcanic rocks, diverse continental crustal domains were defined in the Pelotas Basin, such as an outer domain, probably constituted by highly stretched and permeated continental igneous crust, and a highly reflective lower crust probably reflecting underplating.The analysis of rifting in this portion of the South Atlantic is based on seismic interpretation and on the distribution of regional linear magnetic anomalies. The lateral accretion of SDR to the east towards the future site of the breakup and the temporal relationship between their rift and sag geometries allows the reconstitution of the evolution of rifting in the basin. Breakup propagated from south to north in three stages (130–127.5; 127.5–125; 125–113 Ma) physically separated by oceanic fracture zones (FZ). The width of the stretched, thinned and heavily intruded continental crust also showed a three-stage increase in the same direction and at the same FZ. Consequently, the Continental-Oceanic Boundary (COB) shows three marked shifts, from west to east, from south to north, resulting into rift to margin segmentation. Rifting also propagated from west to east, in the direction of the final breakup, in each of the three segments defined. The importance of the Paraná–Etendeka LIP upon the overall history of rupturing and breakup of Western Gondwanaland seems to have been restricted in time and in space only to the Pelotas Basin. 相似文献
10.
- Abundance of total bacteria, heterotrophic bacteria, coliform and oil degradable bacteria and their relations with salinity and suspended matter in the frontal waters in the Hangzhou Bay are described. The results obtained show that the highest abundances of total bacteria , heterotrophic bacteria are encountered around the front and near the northern shore of the Hangzhou Bay, where a positive correlation ( r =0. 70) between the total bacteria abundance and the total suspended matter (TSM) is persent. Moreover,the abundance of oil degradable bacteria being an indicator of oil pollution, is also high in that region. 相似文献
11.
ＭｏｄｅｌｌｉｎｇｏｆｔｈｅｂａｒｏｔｒｏｐｉｃｐｒｏｃｅｓｓｅｓｉｎｔｈｅＢｏｈａｉＳｅａ￥ＨｕａｎｇＤａｊｉ；ＣｈｅｎＺｏｎｇｙｏｎｇａｎｄＳｕＪｉｌａｎ（ＳｅｃｏｎｄＩｎｇｔｉｔｕｔｅｏｆＯｃｅａｎｏｇｒａｐｈｙ，ＳｔａｔｅＯｃｅａｎｉｃＡｄｍ... 相似文献
12.
V. A. Kuz'min 《Physical Oceanography》1990,1(5):393-397
The values of the function (T, S) on theT, S straight lines with different angular coefficients have been analysed. It is shown that at the point of contact of theT, S straight lines with the corresponding isopycnals, has a conventional maximum and the density ratio isR=1. It is inferred that a conventional density maximum may occur and that theT, S gradients are compensated at the oceanic fronts separating the sub-arctic and subtropical water structures.Translated by Vladimir A. Puchkin. 相似文献
13.
V. V. Bychkov A. S. Perezhogin B. M. Shevtsov V. N. Marichev P. V. Novikov A. A. Cheremisin 《Izvestiya Atmospheric and Oceanic Physics》2011,47(5):603-609
The behavior of the vertical aerosol structure (profiles of the ratio of the coefficients of the backward total and molecular scattering) in the height interval 30–80 km is analyzed from the results of lidar observations in Kamchatka over the period from October 2007 through December 2009. The obtained data revealed a regular two-layer aerosol structure in this height range with the maxima of the ratio of the scattering coefficients in the upper stratosphere at heights 35–50 km and in the mesosphere at heights of 60–75 km, as well as a relation between seasonal variations in the aerosol stratification and the circumpolar vortex affecting dynamic processes in the atmosphere of midlatitudes. The procedure of including the aftereffect of the Hamamatsu-M8259-01 PEM, which influences the error in the calculation of the ratio of scattering coefficients, is described. 相似文献
14.
In this paper, numerical modelling of the fluctuation of the thermocline in the Bohai Sea has been made using a two-dimensional nonlinear model in stratified ocean and the model for the depth of the thermocline under the effects of wind stirring. The computed results depict the variations of the fluctuation of the thermocline driven by different kinds of wind fields. The fluctuation of the thermocline in the Bohai Sea varies somewhat with different directions, paths and locations of typhoon (cyclone). Under the effects of strong wind, the thermoclines both sink due to mixing and fluctuate. Furthermore, the fluctuation of the thermocline speeds up mixing. At last, the thermoclines disappear after 12-15 h when the strong wind increases from Force 6 to Force 9. 相似文献
15.
R. Yu. Tarakanov 《Oceanology》2014,54(1):1-7
The horizontal structure of the jets of the Antarctic Circumpolar Current (ACC) is analyzed on the basis of CTD- and LADCP- sounding performed during a hydrophysical survey with a 10-mile spatial resolution in the central part of the Drake Passage in October–November of 2008. According to the modern multijet classification of the ACC, the survey area covered the zones of three jets of the South Polar Current (SPC), which is the middle branch of the ACC. The current jets revealed a fine horizontal thermohaline structure, which was manifested even in the case of the confluence of individual jets into a “superjet.” 相似文献
16.
ＡｒｅｓｔｕｄｙｏｆｏｓｔｒａｃｏｄｅａｓｓｅｍｂｌａｇｅｓｉｎｔｈｅｓｕｒｆａｃｅｓｅｄｉｍｅｎｔｓｏｆｔｈｅＨｕａｎｇｈａｉＳｅａ￥ＺｈｏｕＢａｏｃｈｕｎ；ＺｈａｏＱｕａｎｈｏｎｇ；ＨｕａｎｇＷｅｉａｎｄＧａｏＪｉａｎｘｉ（Ｄｅｐａｒｔｍｅｎｔｏ... 相似文献
17.
Riming Wang Zhijun Dai Hu Huang Xixing Liang Xiaoyan Zhou Zhenming Ge Baoqing Hu 《海洋学报(英文版)》2023,(7):116-123
The horizontal structure of mangrove forests is an important characteristic that reflects a significant signal for coupling between mangroves and external drivers. While the loss and gain of mangroves has received much attention, little information about how the horizontal structure of mangrove forests develops from the seedling stage to maturity has been presented. Here, remote sensing images taken over approximately 15 years, UVA images, nutrient elements, sediments, and Aegiceras corniculatum... 相似文献
18.
Zang Jiaye 《海洋学报(英文版)》1995,(4)
Ｔｈｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｍｅｔｈａｎｅ ｉｎ ｔｈｅ Ｔｏｋｙｏ－ｗａｎＺａｎｇＪｉａｙｅ（ＲｅｃｅｉｖｅｄＡｕｇｕｓｔ８，１９９５；ａｃｃｅｐｔｅｄＳｅｐｔｅｍｂｅｒ２，１９９５）Ａｂｓｔｒａｃｔ：Ｅｌｅｖｅｎｓｔａｔｉｏｎｓｗｅｒ... 相似文献
19.
Introduction The growth of phytoplankton, which is the main primary producer in the ocean, is always limited by some nutrients such as nitrogen and phosphorus. This limitation has spacial variation, and even in the same area, the nitrogen and phosphorus limitation has seasonal alternation [1]. There are many ways to determine the nutrient limitation of phytoplankton growth. Among them, the enrichment bioassay is the closest to the natural condition and is accepted by many scholars [2-7]. In r… 相似文献
20.
This note reports the histological studies of gonad of the mullet. The fishes werecollected from the Huanghua and the Beitang of Cyclic changes of the gonads in mulletwere studied in the adu1t and young fishes. Qil globule formation in the oocytes began at stage Ⅱ to Ⅲ of gonad development(usually at the end of stage Ⅱ). When the oil globules fromed a ring in the periphery ofthe nucleus, the gonads entered stage Ⅲ. The oil globules extended from center to outerregion and combined with each other, at last there was only one golden oil globule in theegg. There is no vesicle in the mullet. Yolk formation in the oocytes begen in the winter. The volume of the ovary andthe size of eggs attained a maximum at the end of April or at the beginning of May. 相似文献