ROY—A multiscale magnetospheric mission     

S. Savin  L. Zelenyi  V. Budaev  J. Buechner  M. Balikhin  V.E. Korepanov  V. Kudryashov  L. Lezhen  Z. Nemecek  D. Novikov  J.L. Rauch  S. Romanov  A. Skalsky 《Planetary and Space Science》2011,59(7):606-617

The scientific rationale of the ROY multi-satellite mission addresses multiscale investigations of plasma processes in the key magnetospheric regions with strong plasma gradients, turbulence and magnetic field annihilation in the range from electron inertial length to MHD scales.The main scientific aims of ROY mission include explorations of:

(a)

turbulence on a non-uniform background as a keystone for transport processes;

(b)

structures and jets in plasma flows associated with anomalously large concentration of kinetic energy; their impact on the energy balance and boundary formation;

(c)

transport barriers: plasma separation and mixing, Alfvenic collapse of magnetic field lines and turbulent dissipation of kinetic energy;

(d)

self-organized versus forced reconnection of magnetic field lines;

(e)

collisionless shocks, plasma discontinuities and associated particle acceleration processes.

In the case of autonomous operation, 4 mobile spacecrafts of about 200 kg mass with 60 kg payload equipped with electro-reactive plasma engines will provide 3D measurements at the scales of 100-10000 km and simultaneous 1D measurements at the scales 10-1000 km. The latter smaller scales will be scanned with the use of radio-tomography (phase-shift density measurements within the cone composed of 1 emitting and 3 receiving spacecrafts).We also discuss different opportunities for extra measurement points inside the ROY mission for simultaneous measurements at up to 3 scales for the common international fleet.Combined influence of intermittent turbulence and reconnection on the geomagnetic tail and on the nonlinear dynamics of boundary layers will be explored in situ with fast techniques including particle devices under development, providing plasma moments down to 30 ms resolution.We propose different options for joint measurements in conjunction with the SCOPE and other missions:

•

simultaneous sampling of low- and high-latitudes magnetopause, bow shock and geomagnetic tail at the same local time;

•

tracing of magnetosheath streamlines from the bow shock to near-Earth geomagnetic tail;

•

passing “through” the SCOPE on the inbound orbit leg;

•

common measurements (with SCOPE and other equatorial spacecraft) at distances of ∼ few thousand km for durations of ∼several hours per orbit.

The orbit options and scientific payload of possible common interest are discussed in this work, including FREGAT cargo opportunities for extra payload launching and the “Swarm” campaigns with ejection of nano- and pico-satellites.  相似文献   

The influence of global atmospheric oscillation on formation of climate anomalies in the Russian Far East     

V. I. Byshev  V. G. Neiman  V. I. Ponomarev  Yu. A. Romanov  I. V. Serykh  T. V. Tsurikova 《Doklady Earth Sciences》2014,458(1):1116-1120

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Magnetic turbulence in the cusp region: 3D spectra and vortex cascades     

S. A. Romanov 《Geomagnetism and Aeronomy》2013,53(6):733-740

Cluster satellite measurements that were carried out in the region of the altitudinal cusp in the Earth’s magnetosphere and adjacent regions were processed to yield the dynamic pattern of the 3D spectra of magnetic field oscillations in the space of wave vectors, with wave numbers ranging from 0.002 to 0.5 rad/km. The anisotropic properties of space spectra that are functions of the mean plasma parameters are studied. The role of the ion cyclotron resonances and the resonance related to the ion inertial length is shown. The vortex structures detected in the cusp and adjacent regions are described. The issue concerning in what directions turbulent energy is primarily transferred in the physical space.  相似文献   

Inverse problems in mathematical modeling of flood waves routing     

A. V. Romanov 《Russian Meteorology and Hydrology》2009,34(8):549-555

Results generalizing a cycle of works, connected with formulation and solution of inverse problems for one-dimensional model of unsteady water flow in rivers are presented. Various procedures allowing determining all basic characteristics of complicated riverbed using observations of unsteady water flow are considered. Data on restoration, convolution and use of the received characteristics in numerical schemes of the short-term stream flow forecasting for several reaches of artificial and real riverbeds with flood plains are analyzed. The main problems connected with development of methods of solution of the inverse problems for mathematical models of hydrological processes are formulated in general view.  相似文献   

Evaluating ecological quality in the north-eastern Black Sea coastal zone   总被引：1，自引：0，他引：1  

Wilson JG  Komakhidze A  Osadchaya T  Alyomov S  Romanov A  Tediashvili M 《Marine pollution bulletin》2008,57(1-5):202-207

Anthropogenic pressures have resulted in measurable impacts on the coastal ecosystems of the northern (Sevastopol Bay, Ukraine) and eastern (Batumi aquatoria, Georgia) Black Sea. Indices suggest that major impacts are relatively localized and are comparable to similar situations in the northern Atlantic. In contrast, biodiversity was appreciably lower than from comparable north Atlantic waters. The number of macrobenthic species was typically round 50, less than half the number that might be expected from similar exercises in US or European waters. Site-specific indices likewise indicated a somewhat lower diversity within communities, yielding metrics which would indicate a measure of stress in N. Atlantic situations. Microbial status was generally good, although regions close to urbanisation did not comply with standards laid down in the current EC Bathing Water Directive (76/EC/160). Likewise viruses were more commonly, although not exclusively, associated with urban locations, as were phages. Microbial investigation of the sediments confirmed the presence of heterotrophic and oil-oxidising bacteria. Abundance of the latter was closely correlated to the degree of oil contamination of the sediments, and to temperature, although for both, the results showed that the increase in bacterial abundance did level off beyond a certain point. Numbers of oil-oxidising bacteria in the water column displayed a classical response to temperature, with abundance doubling over a 10-degree C rise in temperature. Overall the results suggest that while indices in current use are useful in evaluating coastal quality in the Black Sea, some adjustments would be necessary especially in the establishment of baseline or reference values.  相似文献   

The Effect of Heat Conduction on the Formation of Coronal Condensations in the Solar Atmosphere     

Romanov  K. V. 《Geomagnetism and Aeronomy》2018,58(8):1123-1128

Geomagnetism and Aeronomy - In this work, the evolution of oscillation instability in large-scale magnetic fields in the upper layers of the Sun’s convective zone is studied. The nonlinear...  相似文献   

Using a radiative-convective model to estimate the temperature potential of greenhouse gases     

A. S. Ginzburg  S. V. Romanov  B. A. Fomin 《Izvestiya Atmospheric and Oceanic Physics》2008,44(3):300-306

A comprehensive approach is proposed to the construction of an equilibrium global warming potential with the use of a radiative-convective model of climate and the line-by-line calculations of the characteristics of radiative transfer in the atmosphere on the basis of analysis and comparison of different methods of estimating emission metrics. The studies conducted in the past decade have demonstrated that a widely used method of calculating the global warming potential for methane and other trace greenhouse gases is applicable only to relatively small time horizons (within 100 years). The proposed equilibrium global warming potential makes it possible to consider a set of equilibrium states of the Earth’s climate system under variations in the contents of greenhouse gases in the atmosphere and to estimate the parameters of the system’s response to such variations for arbitrary time intervals. Analysis of a set of different equilibrium states makes it possible to assess a relative contribution of different anthropogenic pollutants to radiation balance and, hence, to a change in the Earth’s climatic regime.  相似文献   

The use of satellite information for precomputing the snowmelt runoff hydrograph     

L. S. Kuchment  A. N. Gel’fan  V. N. Demidov  P. Yu. Romanov 《Russian Meteorology and Hydrology》2011,36(9):630-637

A technique is proposed of precomputing the snowmelt runoff hydrograph on the basis of physical and mathematical models of river runoff formation, available standard data of surface hydrometeorological measurements, and satellite measurements of Earth’s surface conditions. The computations were carried out for two regions including the basins of the Vyatka and Don rivers. It is demonstrated that, in spite of the possible errors and gaps depending on meteorological conditions, the satellite snow cover measurements can be an important addition to the surface measurements for simulating a spatial picture of the runoff formation. The use of physical and mathematical models of the runoff formation enables to reduce the errors of satellite snow cover data and to ensure the spatiotemporal continuity of its monitoring.  相似文献   

On the spatial nonuniformity of some parameters of global variations in the recent climate     

V. I. Byshev  V. G. Neiman  Yu. A. Romanov  I. V. Serykh 《Doklady Earth Sciences》2009,426(1):705-709

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Evaluation of stable iodine status of the areas affected by the Chernobyl accident in an epidemiological study in Belarus and the Russian Federation     

Elena Korobova  Yadviga Anoshko  Ausrele Kesminiene  Aleksander Kouvyline  Sergei Romanov  Vanessa Tenet  Eero Suonio  Elisabeth Cardis 《Journal of Geochemical Exploration》2010

Variation of the stable iodine supply was evaluated in the soils of around more than 700 settlements in the regions (oblasts) of Belarus and the Russian Federation contaminated after the Chernobyl accident. It involved the use of regional information on iodine content in different types of soil cover, biogeochemical criteria of iodine deficiency in food chains, and the available soil maps.  相似文献