Diagnosis of the interaction of tropical cyclones

At present the mutual influence of tropical cyclones (TCs) has been investigated to a much lesser extent than the cyclones themselves. Most frequently, such investigations are restricted to the study of the influence of the interaction of two TCs on their motion. However, actually, the mutual influence of TCs is much more diverse. For example, each cyclone alters the state of the medium (in particular, decreases the heat store of the upper ocean layer), i.e., affects the subsequent cyclones. Under conditions of a limited energy resource of the medium, cyclones, existing simultaneously, “compete,” to a degree, with each other. These and other similar circumstances have made it practical to consider tropical cyclones and the environment as interdependent elements of a complex open system. This study considers two versions of nonlinear models describing the interaction of TCs with the upper ocean layer and with one another similarly to a number of well-known and verified models of synergetics (interaction of populations, dynamics of optical quantum generators). It is shown that the models reproduce some very important qualitative features of the evolution of TC intensity.     

The Answer to the Comments by Yu. D. Resnyanskii to the Papers by L. Kh. Ingel’ and A. A. Makosko

The critical comments to the publications by the authors ofthe present paper that were given in [10] (the publications deal with the possible effects of gravity field inhomogeneities in the atmosphere and ocean) are discussed. In the authors' opinion, some remarks are groundless. At the same time, the authors agree with one of the important remarks that the results of their paper concerning studies of the ocean disturbances are to be reconsidered.     

Estimation of the Impact of Gravity Heterogeneities on the Heat Regime of the Boundary Layer of the Atmosphere

Doklady Earth Sciences - The heterogeneities of the gravity field (HGF) deform the fields of air pressure, density, and temperature and affect the temperature regime of the boundary layer of the...     

On the nonlinear dynamics of the boundary layer of intense atmospheric vortex

The paper describes a stationary model of the boundary layer of a large-scale vortex. The model takes into account two types of nonlinearities: (1) advection of the momentum and centrifugal accelerations, that is related to large values of the Rossby number; (2) a nonlinear turbulent friction on the lower boundary (generally speaking, not only quadratic, but also more complicated). Nevertheless, the model may be studied analytically. This approach allows discovery and analysis of several universal regularities, which are not revealed by numerical modeling. The model provides the actual values for the speed of the surface wind and the angle of cross-isobar surface flow in the tropical cyclones.     

On the possible mechanism of the intensification of the vertical exchange in the ocean during earthquakes

In recent years, some papers reported events of the lowering of the temperature of the sea surface subsequent to earthquakes. This paper is devoted to a discussion of the possible mechanism of the intensification of the mixing of seawater under earthquakes. The possible role of the intensive turbidity flows that are sometimes generated in the near-bottom layer over a sloping bottom subsequent to earthquakes is discussed. The estimates made on the basis of a semiempirical theory of turbulence show that the shear currents caused by these flows can lead to a fast turbulization and mixing of rather thick water layers.     

On a positive-feedback mechanism in intense atmospheric vortices

Attention is focused on a positive feedback that may play a significant role in intense vortices, such as tornadoes and, probably, tropical cyclones: rotation suppresses turbulence which, in turn, may intensify rotation. Some simple models illustrate this phenomenon.     

Stratified Flows Due to Spatial Inhomogeneities of Exchange Coefficients

Izvestiya, Atmospheric and Oceanic Physics - Attention is drawn to the unexplored mechanism of generation of density currents in stratified media. Horizontal inhomogeneities of the exchange...