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排序方式: 共有76条查询结果,搜索用时 15 毫秒
1.
The results of simultaneous measurements of the bottom (6.25 and 35 m above the bottom) currents, deep currents, and surface currents made at three points in the north-east tropical Pacific Ocean are given. The bottom intensification of the current velocity is revealed in a layer of 35–25 m above the bottom. The estimation of the thickness of the bottom boundary layer (BBL) indicates that the velocity intensification is observed over the boundary layer upper border. A 10-day long benthic storm with a maximum measured velocity of 13 cm/s was revealed 6 m above the bottom. As was found, the origin of the benthic storm is associated with the penetration of an anticyclonic eddy down to the bottom.Translated by Mikhail M. Trufanov. 相似文献
2.
A. V. Belyaev 《GeoJournal》1995,35(1):17-21
Presented natural-climatological characteristics of water resources forming conditions of the Aral sea basin. Analised flow variability correlation of Amy Darya and Syr Darya from the point of their influence on the sea level fluctuation.Shows up the tendences of structural changes and efficiency of water resources usage of the region, presents their present-day spacial-geographical peculiarities.On the basis of temporal analysis of water balance structure of the Aral Sea, forming processes of river flow and its discharge a conclusion about quantative correlation of natural and anthropogenic components of sea level degradation is made. 相似文献
3.
V. S. Belyaev G. S. Bisnovatyi-Kogan A. I. Gromov B. V. Zagreev A. V. Lobanov A. P. Matafonov S. G. Moiseenko O. D. Toropina 《Astronomy Reports》2018,62(3):162-182
The results of MHD numerical simulations of the formation and development of magnetized jets are presented. Similarity criteria for comparisons of the results of laboratory laser experiments and numerical simulations of astrophysical jets are discussed. The results of laboratory simulations of jets generated in experiments at the Neodim laser installation are presented. 相似文献
4.
A. A. Vetrov N. V. Lobus A. N. Drozdova N. A. Belyaev E. A. Romankevich 《Oceanology》2018,58(2):198-204
The methane content in water and bottom sediments was measured in vertical sections: Lena River Delta–continental slope (the Laptev Sea), Taimyr Peninsula–Voronin Trough, and along the Novaya Zemlya Archipelago. The methane concentrations varied from 2.5 to 70 nmol/L and from 590 to 2600 nmol/L in the water column and sediments, respectively. Most of the surface water samples showed oversaturation in methane (up to 19-fold, fourfold on average), which determined the water–atmosphere direction of methane fluxes, which amounted to 1–400 mol/km2 day (52 mol/km2 day on average). 相似文献
5.
E. A. Silow D. J. Stom N. A. Basharova A. A. Belyaev N. A. Buntina O. A. Burlakova T. A. Dzuban E. N. Ermakova N. A. Zausaeva A. I. Spivak T. G. Khramtzova G. V. Shahova N. G. Sheveleva N. A. Shestakova 《洁净——土壤、空气、水》1991,19(6):629-634
Fertilization experiments in mesocosms of 1 … 2,000 1 containing up to 0.32 mg/l P and 1.7 mg/l N in summer and in winter did not show any significant changes of the hydrochemical conditions and in the bacterio-plankton. CO2-assimilation (14-C method) is reduced by circa 10= by nutrient doses, whereas the chlorophyll concentration increases significantly due to addition of P and N at the same time in summer, a decrease taking place in winter. The different courses of development are connected with different reactions of individual species of phytoplankton. 相似文献
6.
E. V. Belyaev 《Doklady Earth Sciences》2014,455(2):368-369
An assessment of the prospects of apatite mineralization with brief characteristic of the expected geological-industrial types, composition, and mineralogical-technological parameters of ores of the forecast deposits is given for the major tectonic structures of Antarctica. The main prospects are related to the rift (protorift, greenstone, and rift) zones of the Antarctic shield. 相似文献
7.
Based on the Kalman filter theory, a new data-assimilation method has been used to improve the 3-D oceanic temperature field
of the Center for Ocean-Land-Atmosphere Studies (COLA) coupled general circulation model. This method is applied to assimilate
surface and subsurface temperature of in situ measurements from the Pilot Research Moored Array in the Tropical Atlantic project
(PIRATA). The assimilation of the PIRATA data produces an improved representation of the thermal state of the ocean and allows
a better estimation of other oceanographic quantities, like meridional heat fluxes and zonal currents. The present paper focuses
on the tropical Atlantic and, in particular, it contains new reconstructed temperature profiles. One-month forecast experiments
during 1999 were performed and the impact of the assimilation is discussed.
Received: 24 April 2001 / Accepted: 8 March 2002 相似文献
8.
Belyaev Yu. R. Panin A. V. Kiryuhina A. D. Koshurnikov A. V. Kramynin A. M. Pavlov M. A. Konstantinov E. A. Kurbanov R. N. Zakharov A. L. Sychev N. V. 《Doklady Earth Sciences》2022,506(1):S84-S93
Doklady Earth Sciences - A complex of works including geomorphological deciphering, field survey, drilling, electric prospecting, and dating of deposits using the radiocarbon method and optically... 相似文献
9.
Oceanology - The data assimilation (DA) of satellite observations of the ocean level from the Archiving Validating and Interpolating Satellite Observations (AVISO) into the IWM model (G.I. Marchuk... 相似文献
10.
A. Yu. Lein A. S. Savvichev I. I. Rusanov G. A. Pavlova N. A. Belyaev K. Craine N. V. Pimenov M. V. Ivanov 《Lithology and Mineral Resources》2007,42(3):221-239
Study of biogeochemical processes in water and sediments of the Chukchi Sea in August 2004 revealed atypical maximums of the concentration of biogenic elements (N, P, and Si) and the rate of microbial sulfate reduction in the surface layer (0–3 cm) of marine sediments. The C: N: P ratio in the organic matter (OM) of this layer does not fit the Redfield-Richards stoichiometric model. Specific features of biogeochemical processes in sea are likely related to the complex dynamics of water, high primary productivity (110–1400 mg C/(m2 day)), low depth of basin (<50 m in 60% of the water area), reduced food chain due to low population of zooplankton, high density of zoobenthos (up to 4230 g m?2), and high activity of microbial processes. Drastic decrease in the concentration of biogenic elements, iodine, total alkalinity (Alk), and population of microorganisms beneath the 0–3 cm layer testify to a large-scale OM decay at the water-seafloor barrier. Our original experimental data support the high annual rate of OM mineralization at the bottom of the Chukchi Sea. 相似文献