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Zhmur V. V. Novoselova E. V. Belonenko T. V. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(6):632-641
Izvestiya, Atmospheric and Oceanic Physics - The potential vorticity (PV) in the ocean is considered, including the history of the term. Various aspects and basic formulas used to calculate the PV... 相似文献
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Oceanology - Variations in the Brunt–Väisälä frequency caused by mesoscale eddies of different polarity are analyzed. The Lofoten Basin in the Norwegian Sea is the study... 相似文献
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Zhmur V. V. Belonenko T. V. Novoselova E. V. Suetin B. P. 《Doklady Earth Sciences》2023,507(3):S457-S460
Doklady Earth Sciences - When mesoscale vortices interact with the flow, there are three variants of their behavior: rotation, nutational oscillations, and unlimited elongation. This work describes... 相似文献
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Summary. The determination of induced magnetic fields of synoptic ocean movements is considered in the case of horizontal uniformity of the bottom conductivity. The problem of calculation of hydrodynamic parameters is solved by means of induced fields. These appear to depend closely on the appearance of barotropic or baroclinic parts in the synoptic ocean movement. The different properties of fields from parts of the above permit us to separate hydrodynamic parameters of complex ocean movements into barotropic and baroclinic parts by means of magnetic measurements. 相似文献
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Fine-fibrous kerites of the Volyn region represent mummified remains of cyanobacterial mats that functioned in the thermal geyser spring. Alienation of mat from the substrate and its burial in a dry cavity of the self-sealed biogenic-geyser siliceous structure, where mummification of microorganisms occurred owing to the hydrocarbon component under specific conditions close to those in dry caves, favored the high-degree preservation of primary features of the community biomass (its general life-time structure, microorganism morphology, ultra-fine cell structure, and biochemical marks). Organic matter was destroyed under low temperatures and pressures. Paleomicrobiological analysis of Paleozoic graphites from the Botogol Massif of nepheline syenites (eastern Sayan) indicates that mummified microorganisms from the thermal mat can preserve their morphology even when primary biomass is carbonized up to the most perfect carbon forms. The obtained data can be important both for the interpretation of the origin of most ancient carbonaceous structures of the Earth and for recognition of the mummified remains of microorganisms in meteorites. 相似文献
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The impact of tidal wave on a permeable shore consisting of porous material results in groundwater table lying above the average sea level. This effect, stemming from the nonlinearity of the process of seawater flow in the soil, is referred to as pumping effect. 相似文献
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A. L. Bondarenko V. V. Zhmur Yu. G. Filippov V. A. Shchev’ev 《Physical Oceanography》2004,14(5):275-283
Parallel with the traditional hypotheses on the predominantly wind (Ekman), gradient, and thermohaline nature of large-scale currents in seas and oceans, there exist hypotheses on the participation of long-period waves in the formation of these currents. As the physical mechanisms of generation of currents by waves, one can mention nonlinear wave transport and the phenomenon of negative viscosity in waves. From the viewpoint of existence of these mechanisms, numerous scientists explain high velocities of jet currents and their stable character. The predominant role of winds and thermohaline processes in the formation of large-scale currents is also accepted. On the basis of the experimental data, we demonstrate additional possibilities for the formation of large-scale currents given by the transport of water masses by long-period waves.Translated from Morskoi Gidrofizicheskii Zhurnal, No. 5, pp. 24–34, September–October, 2004.This revised version was published online in May 2005 with corrections to cover date. 相似文献
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S. P. Meacham K. K. Pankratov A. F. Shchepetkin V. V. Zhmur 《Dynamics of Atmospheres and Oceans》1994,21(2-3)
We show that an arbitrarily oriented ellipsoid of uniform potential vorticity, embedded in a background flow described by a quadratic streamfunction, is an exact solution of the quasigeostrophic equations governing motion in a uniformly stratified, unbounded fluid. This type of flow includes plane horizontal shear and strain as well as uniform vertical shear of a unidirectional horizontal flow. We derive ordinary differential equations describing the motion of such a vortex and discuss some aspects of their solutions. We note the existence of steady states (solutions in which the vortex is in equilibrium with the background flow), of periodic solutions near these steady states, of non-periodic trajectories which nervertheless remain in the vicinity of the steady states, and of solutions which represent the shearing out of the vortex by the background flow. We try to use this information to propose partial answers to the question of when a given horizontal or vertical shear flow is likely to destroy a vortex and when a vortex might survive external shear and strain. 相似文献
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The coastal zone of the sea is a boundary domain between seawater and land, making most processes within it to show specific features. Seawater can penetrate into aquifers in the land part of the shore through the underwater part of the sea–shore interface and move over considerable distances from the shoreline, mixing with fresh groundwater. This process is of critical importance for the construction of oil and gas pipelines in permafrost areas. 相似文献
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We study the peculiarities of spreading of gravity-suspended matter bearing flows along a sloping bottom under the condition of the intense entrainment of bottom sediments. It was found that the velocity of the propagation of such a flow remains constant, while the heading part conserves the size and excessive mass of the entrained solid fraction. A hypothesis was put forward that the gravity force that draws the flow down is compensated for by an antireactive force related to the entrainment of the bottom sediments into the motion, drag resistance, and bottom friction. The antireactive force was the main resistance force in the experiments. 相似文献
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