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Roman Ryzhkov  - - - 
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Arthur Zakinyan

33 shared publications

Robert Zakinyan

12 shared publications

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Distribution of Articles published per year 
(2016 - 2018)
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3
 
Publications
Article 1 Read 0 Citations Vortex Motion State of the Dry Atmosphere with Nonzero Velocity Divergence Robert Zakinyan, Arthur Zakinyan, Roman Ryzhkov, Julia Semen... Published: 10 February 2018
Atmosphere, doi: 10.3390/atmos9020061
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In the present work, an analytical model of the vortex motion basic state of the dry atmosphere with nonzero air velocity divergence is constructed. It is shown that the air parcel moves along the open curve trajectory of spiral geometry. It is found that for the case of nonzero velocity divergence, the atmospheric basic state presents an unlimited sequence of vortex cells transiting from one to another. On the other hand, at zero divergence, the basic state presents a pair of connected vortices, and the trajectory is a closed curve. If in some cells the air parcel moves upward, then in the adjacent cells, it will move downward, and vice versa. Upon reaching the cell’s middle height, the parcel reverses the direction of rotation. When the parcel moves upward, the motion is of anticyclonic type in the lower part of the vortex cell and of cyclonic type in the upper part. When the parcel moves downward, the motion is of anticyclonic type in the upper part of the vortex cell and of cyclonic type in the lower part.
Article 1 Read 0 Citations Vortex Motion State of the Dry Atmosphere with Nonzero Velocity Divergence Robert Zakinyan, Roman Ryzhkov, Julia Semenova, Arthur Zakin... Published: 17 July 2017
Proceedings, doi: 10.3390/ecas2017-04125
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In the present work an analytical model of the vortex motion elementary state of the dry atmosphere with nonzero air velocity divergence is constructed. It is shown that the air parcel moves along the open curve trajectory of spiral geometry. It is found that for the case of nonzero velocity divergence the atmospheric elementary state presents an unlimited sequence of vortex cells transiting from one to another. On the other hand, at zero divergence, the elementary state presents a pair of connected vortices, and the trajectory is a closed curve. If in some cells the air parcel moves upward then in the adjacent cells it will move downward and vice versa. At reaching the cell middle height the parcel reverses the direction of rotation. When parcel moves upward, the motion is of anticyclonic type in the lower part of the vortex cell and of the cyclonic type in the upper part. When parcel moves downward, the motion is of anticyclonic type in the upper part of the vortex cell and of the cyclonic type in the lower part.
Article 0 Reads 0 Citations Phases of the Isobaric Surface Shapes in the Geostrophic State of the Atmosphere and Connection to the Polar Vortices Robert Zakinyan, Roman Ryzhkov, Arthur Zakinyan Published: 05 October 2016
Atmosphere, doi: 10.3390/atmos7100126
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This paper presents a theoretical study of the disturbed isobaric surface shape in the geostrophic state of the atmosphere. It has been shown that, depending on the overheat sign at the equator, the isobaric surface has the shape of an oblate or prolate geoid. If the geostrophic wind velocity is nonzero at the poles, the local pressure extrema (minima for oblate geoid and maxima for prolate geoid) appear at the poles in the geostrophic state. This result correlates with the well-known polar vortex phenomenon and possibly can refine our understanding and interpretation of the phenomenon. In other words, the existence of polar minima and maxima of the pressure field can be the peculiarity of the geostrophic state of the atmosphere. It has been found that air must be colder than the surrounding atmosphere for initiation of the zonal eastward transport. For warm air mass, only easterly winds will be observed.
Conference 2 Reads 0 Citations On the Isobaric Surface Shape in the Geostrophic State of the Atmosphere Robert Zakinyan, Roman Ryzhkov Published: 15 July 2016
The 1st International Electronic Conference on Atmospheric Sciences, doi: 10.3390/ecas2016-a004
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Article 0 Reads 1 Citation Convection of Moist Saturated Air: Analytical Study Robert Zakinyan, Roman Ryzhkov, Kristina Avanesyan, Arthur Z... Published: 05 January 2016
Atmosphere, doi: 10.3390/atmos7010008
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In the present work, the steady-state stationary thermal convection of moist saturated air in a lower atmosphere has been studied theoretically. Thermal convection was considered without accounting for the Coriolis force, and with only the vertical temperature gradient. The analytical solution of geophysical fluid dynamics equations, which generalizes the formulation of the moist convection problem, is obtained in the two-dimensional case. The stream function is derived in the Boussinesq approximation with velocity divergence taken as zero. It has been shown that the stream function is asymmetrical in vertical direction contrary to the dry and moist unsaturated air convection. It has been demonstrated that the convection in moist atmosphere strongly depends on the vapor mass fraction gradient.