Untitled

Shevtsova, O. V.

doi:10.1023/a:1012842014327

Cited by 4 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the concentration is low, this relation is analogous to (3). When the concentration is high, we have the same asymptotic as for (5).…”

mentioning

confidence: 65%

“…Fig. 1 represents the dependencies of standards σ on time average concentrationsρ of 16 chemical parameters measured at 13 points of diurnal observations in Amur Bay of the Sea of Japan (for initial data see [3]). Two regions are notable in the concentration range of 10 −4 − 3.3 × 10 4 mg/kg, they are: withρ< 10 2 mg/kg for non-conservative parameters and withρ>10 2 mg/kg for conservative ones.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Fractional properties of geophysical field variability on the example of hydrochemical parameters

Шевцов

Shevtsova

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. Using the properties of compound Poisson process and its fractional generalizations, statistical models of geophysical fields variability are considered on an example of hydrochemical parameters system. These models are universal to describe objects of different nature and allow us to explain various pulsing regime. Manifestations of non-conservatism in hydrochemical parameters system and the advantages of the system approach in the description of geophysical fields variability are discussed.Universal character and wide use of power laws in nature are associated with the fundamental summation of identically distributed random variables and the law of large numbers. We can list many examples of power law characterizing complicated systems of heterogeneous elements in different areas of natural sciences (astrophysics, seismology, turbulence theory etc.) including the same relations describing sea water chemical parameters system [1,2]. The elements of this system are interacting between each other (directly and indirectly) and with the elements of other systems represented by hydrophysical fields and hydrobiology objects. All these interactions create a great diversity of variability factors affecting the chemical system behavior. Fig. 1 represents the dependencies of standards σ on time average concentrationsρ of 16 chemical parameters measured at 13 points of diurnal observations in Amur Bay of the Sea of Japan (for initial data see [3]). Two regions are notable in the concentration range of 10 −4 − 3.3 × 10 4 mg/kg, they are: withρ< 10 2 mg/kg for non-conservative parameters and withρ>10 2 mg/kg for conservative ones. All the data of non-conservative parameters (dissolved oxygen, nutrients, carbonic parameters) are approximated by a unified power law regression with the exponent γ = 0.68 ± 0.02. The conservative parameter data (salinity and components of major salt composition) are approximated by a series of separate parallel regressions with γ = 1, each of which refers to a separate observation point.It is obvious that for each concentration region there is a own set of peculiar basic factors of variability. In the parameters system under consideration, the fluctuation regime change corresponds to the boundary concentration ofρ=10 2 mg/kg. In this paper, we consider how and what factors determine the behavior of a hydrochemical system.Before we turn to the discussion of a statistical model of hydrochemical parameters system behavior, we shall adduce some analogies. For example, a flow of seismic events may be considered

show abstract

“…When the concentration is low, this relation is analogous to (3). When the concentration is high, we have the same asymptotic as for (5).…”

mentioning

confidence: 65%

mentioning

confidence: 99%

Fractional properties of geophysical field variability on the example of hydrochemical parameters

Шевцов

Shevtsova

2017

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…As a rule, these systems are high-dimensional that makes the difficulty for their researches. However, the reducing of the high-dimensionality is possible using different relations so as the chemical parameters ratios [11], fractality of hydrochemical variability [12][13][14], allometry [15], flicker effects [16], the spectrum of turbulence or tides and so on. [12]…”

Section: The Complex Natural Systemsmentioning

confidence: 99%

Fluctuations and nonlinear oscillations in complex natural systems

Шевцов

Shevtsova

2018

E3S Web Conf.

View full text Add to dashboard Cite

Resonance propagation of radiation in the ionosphere, solar activity, magnetic dynamos, lightning discharges, fracture processes, plastic deformations, seismicity, turbulence and hydrochemical variability are considered as examples of complex dynamical systems in which similar fluctuation and nonlinear oscillation regimes arise. Collective effects in the systems behavior and chaotic oscillations in individual subsystems, the ratio of random and deterministic, the analysis of variability factors and the change of dynamic regimes, the scaling relation between the elements of the system and the interaction of scales are discussed. It is shown that consolidation and branching in disruptions or thunderstorm activity is the transfer of disturbances to up and down of cascades as in turbulence, and the alpha-omega effects of the magnetic dynamo are the same cascade processes, but in the presence of an external magnetic field or rotation that removes the degeneracy in the system by directions. Particular attention is paid to natural generators and oscillation amplifiers, in which the Lorentz triplet plays the role of a universal model of a nonlinear oscillator. *

show abstract

Regularities in the diurnal variations of hydrochemical characteristics in the coastal zone of a sea

Shevtsova

2009

Water Resour

View full text Add to dashboard Cite

Untitled

Cited by 4 publications

References 2 publications

Fractional properties of geophysical field variability on the example of hydrochemical parameters

Fractional properties of geophysical field variability on the example of hydrochemical parameters

Fluctuations and nonlinear oscillations in complex natural systems

Regularities in the diurnal variations of hydrochemical characteristics in the coastal zone of a sea

Contact Info

Product

Resources

About