排序方式： 共有53条查询结果，搜索用时 15 毫秒
1.
Doklady Earth Sciences - A model of the Earth’s cooling, which describes the formation of a solid core, is considered. Its formation enhances the convection due to additional energy sources... 相似文献
2.
M. Yu. Reshetnyak 《Izvestiya Physics of the Solid Earth》2007,43(8):642-652
A dynamo model for an incompressible liquid in a rectangular rapidly rotating box is considered. The model is based on a pseudospectral method adapted for multiprocessor technology. The effect of rotation in Boussinesq models on some of the basic characteristics of flows is studied: the spatial form of fields, helicity generation, and spectra of fields. A mechanism stabilizing the magnetic field rise associated with the transition of the system to a nonlinear regime is analyzed separately. The results obtained in the paper provide deeper insights into the processes of magnetoconvection in the cores of planets. 相似文献
3.
M. Yu. Reshetnyak 《Geomagnetism and Aeronomy》2009,49(4):542-549
The interaction between Fourier waves, which results in energy transfer over the spectrum, has been considered using the Boussinesq model in a plane layer during rapid rotation as an example. It has been indicated that the wave triangle spectrum strongly differs on the scales shorter (longer) than the scale of a cyclonic turbulence leading mode. 相似文献
4.
M. Yu. Reshetnyak 《Solar System Research》2014,48(3):182-193
Using the Lagrangian approach, the author considered the temporal evolution of an ensemble of interacting magnetohydrodynamic cyclones, obeying equations of the Langevin type, in a rotating medium. The problem is topical for fast-rotating convective objects: cores of planets and a number of stars, where the Rossby numbers are much less than unity and the geostrophic balance of forces is observed. In this work, results of simulation are given both for the two-dimensional case, when axes of cyclones can rotate only in the vertical plane, and for the three-dimensional case when the axes are rotating by two angles. It is shown that a change in the heat flux on the shell boundary impacts the frequency of reversals of the mean dipole magnetic field, which agrees with results of simulation in three-dimensional models of a planetary dynamo. Applications of the model for the giant planets are considered, and an explanation of certain episodes of the geomagnetic field in the past is offered. 相似文献
5.
A. M. Nikanorov L. P. Sokolova O. S. Reshetnyak M. Yu. Kondakova A. O. Danilenko 《Russian Meteorology and Hydrology》2010,35(4):281-288
The results of calculation and analysis of the inflow of dissolved chemical substances to the estuarine area of the Northern
Dvina River are considered. Based on the long-term regime hydrochemical information of the State Service of Observation and
Monitoring of the Natural Environmental State, the anthropogenic load of dissolved chemical substances on the estuarine area
and on the estuarine coastal water is estimated per inflow volumes. The extent of the water environment pollution of the near-delta
part of the Northern Dvina River and its delta is estimated. The distribution of pollutant inflow among arms and channels
in delta is under consideration. 相似文献
6.
Izvestiya, Atmospheric and Oceanic Physics - This paper considers a sequential selection of parameters in a model of cooling of the Earth’s core. The model describes the evolution from the... 相似文献
7.
Dzhamalov R. G. Reshetnyak O. S. Safronova T. I. Myagkova K. G. Vlasov K. G. 《Water Resources》2018,45(2):35-43
Water Resources - The present-day conditions of the formation and distribution of the water resources and chemistry under global warming during the recent decades have been considered. The... 相似文献
8.
M. Yu. Reshetnyak 《Izvestiya Physics of the Solid Earth》2018,54(1):48-51
Application of the extended Kalman filter in the data assimilation problem of the one-dimensional (1D) Parker dynamo model is considered for two extreme cases: (1) when the magnetic field observations are taken uniformly across the entire surface of the liquid core of the Earth and (2) when the observations are taken at one spatial point. The algorithm allows the model solution with arbitrary initial conditions to be modified based on observations. It is shown that the redundancy of the noised data can reduce the efficiency of the recovery of the solution. Considerations on the applicability of data assimilation for the case of a higher dimension and a solution’s convergence dependent on the density of the flow of information assimilated are suggested. 相似文献
9.
Geomagnetism and Aeronomy - Abstract—The ERDA and IGRF-12 geomagnetic field models are used to study the behavior of Earth’s large-scale magnetic field. The unusualness of the modern... 相似文献
10.
Dzhamalov R. G. Vlasov K. G. Myagkova K. G. Reshetnyak O. S. Safronova T. I. 《Water Resources》2019,46(1):S74-S84
Water Resources - The space–time variations in the Oka basin water chemistry have been considered. The specific features in the river water and groundwater pollution along the Oka channel and... 相似文献