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11.
M. V. Martynova 《Water Resources》2011,38(2):211-219
A relationship is established between within-year variations in Fetot/Ptot ratio in pore solution and the concentration of organic P compounds in solid phase. The passage of the FeOOH-P system in
the silts of the Mozhaisk Reservoir from the aerobic conditions to aerobic is generally accompanied by dissolution of FeOOH
and desorption of phosphates. The change from anaerobic conditions to aerobic during the spring and autumn seasons exhibits
hysteresis in oxidation of Fe compounds in silts, such that variations in Fe/P ratio in the solid phase of silt do not agree
with those in the pore solution. 相似文献
12.
Martynova Yu. V. Krupchatnikov V. N. Gochakov A. V. Antokhina O. Yu. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(1):95-109
Izvestiya, Atmospheric and Oceanic Physics - The relationship between the anomalies of the intensity of snow cover formation in Western Siberia (WS) and thermodynamic state of the atmosphere of... 相似文献
13.
M. V. Martynova 《Water Resources》2008,35(3):339-345
Examples of the impact of the content of organic matter and compounds of Al and Fe in freshwater sediments on the phosphorus release from the bottom are studied. The relationships between the phosphorus release from bottom sediments and organic matter concentration in sediments of 22 lakes of the world are obtained and discussed as a result of generalization of actual data. 相似文献
14.
M. V. Martynova 《Water Resources》2017,44(5):758-767
Data of 1970-1971 and 1974-1975 for six layers of the Mozhaisk Reservoir were used to analyze the within-year relationships between Mn concentration and silt Eh and pH. The character of these relationships is explained. For the first time, a critical Eh zone, where Mn concentration abruptly changes, was identified. The redox processes involving Mn were shown to gradually stabilize over time. 相似文献
15.
The paper considers triple encounters in the linear three-body problem for the case of equal masses. Triple encounters are described using two parameters: the virial coefficient k and the angle ? such that tan $\varphi = \dot r/\dot \rho$ , where $\dot r$ and $\dot \rho$ are the velocities of the “central” body relative to each of the “outer” bodies. The equations of motion are integrated numerically up to one of the following times: the time for a receding body to turn, the time for this body to reach some critical distance, the time for some escape criterion to be fulfilled, or to some critical time. Evolutionary scenarios for the triple system are determined as a function of the initial conditions. The dependences of the ejection length on k and $\dot \varphi$ are derived. The initial conditions corresponding to escape form a continuous region with k>0.5. The regions into which the right and left bodies depart alternate and are symmetrical about the lines of triple close encounters (?=45°,225°). Regions of stable motions in the vicinity of the central periodic orbit of Schubart (k?0.206; ?=135°,315°) are identified. Linear structures emanate from the peak of the region of stability, which divide the region for the initial conditions into alternating zones with identical evolutionary scenarios. 相似文献
16.
17.
The seasonal dynamics of the layer-by-layer distribution of P compounds in water (within 70 cm from the bottom) and its relationship with the characteristics of the upper silt layer (0–2 cm) is studied. The regularities of this distribution and the relationships between the properties of water layers and bottom deposits are established. 相似文献
18.
Victor Vladimirovich Orlov Anna V. Petrova Kiyotaka Tanikawa Masaya M. Saito Alija I. Martynova 《Celestial Mechanics and Dynamical Astronomy》2008,100(2):93-120
The rectilinear equal-mass and unequal-mass three-body problems are considered. The first part of the paper is a review that
covers the following items: regularization of the equations of motion, integrable cases, triple collisions and their vicinities,
escapes, periodic orbits and their stability, chaos and regularity of motions. The second part contains the results of our
numerical simulations in this problem. A classification of orbits in correspondence with the following evolution scenarios
is suggested: ejections, escapes, conditional escapes (long ejections), periodic orbits, quasi-stable long-lived systems in
the vicinity of stable periodic orbits, and triple collisions. Homothetic solutions ending by triple collisions and their
dependence on initial parameters are found. We study how the ejection length changes in response to the variation of the triple
approach parameters. Regions of initial conditions are outlined in which escapes occur after a definite number of triple approaches
or a definite time. In the vicinity of a stable Schubart periodic orbit, we reveal a region of initial parameters that corresponds
to trajectories with finite motions. The regular and chaotic structure of the manifold of orbits is mostly defined by this
periodic orbit. We have studied the phase space structure via Poincaré sections. Using these sections and symbolic dynamics,
we study the fine structure of the region of initial conditions, in particular the chaotic scattering region. 相似文献
19.
O. Yu. Antokhina P. N. Antokhin E. V. Devyatova Yu. V. Martynova 《Russian Meteorology and Hydrology》2018,43(3):143-151
This paper studies the long-term variability of frequency of atmospheric blockings over Western Siberia in 1948–2015 based on the data of three reanalysis projects. We revealed a decreasing blocking frequency for eight of twelve months. However, since the estimated trends of blocking frequency are small comparing to the significant amplitude of interannual variations, we proposed to divide the entire studied period into several quasi-decadal intervals that differ both in the amplitude of interannual fluctuations of blocking frequency and in trends. The effect of Western Siberian blockings imposed on synoptic and climatic variability of meteorological parameters in Asia was studied. The study demonstrated that in summer teleconnection patterns in temperature and precipitation fields are of the close sign-alternating structure; this indirectly indicates that in Western Siberia the blocking is a part of a large-scale wave mechanism. Like the Ural blockings, the blockings occurring over Western Siberia affect meteorological characteristics within the East Asian monsoon area. In winter time they contribute to lower surface temperature and decreased precipitation in Southeast Asia. In summer during blocking events over Western Siberia, precipitation increases in the East Asian monsoon area. 相似文献
20.
R. B. Zaripov Yu. V. Martynova V. N. Krupchatnikov A. P. Petrov 《Russian Meteorology and Hydrology》2016,41(11-12):808-815
The system of the cyclic assimilation of data on atmospheric conditions used in the West Siberian Administration for Hydrometeorology and Environmental Monitoring is described. It is based on the WRF-ARW mesoscale atmospheric model and on the WRF 3D-Var system of the three-dimensional variational analysis of data. The system is verified when the first approximation data (6-hour forecast) and WRF-ARW forecasts with the lead time up to 24 hours are compared with the observational data. The problems of assimilation of observations from the AMSU-A and AIRS satellite instruments are considered. The effect of using AMSU-A and AIRS for the analysis in the Novosibirsk region is estimated. The experiments demonstrated that the cyclic data assimilation system operates successfully. The AMSU-A observations improve the quality of analyses and forecasts in winter. In summer the impact of satellite observations on the forecast skill scores is ambiguous. Good short-term forecasts are provided by the initial conditions obtained using the system of detailing of the NCEP large-scale analysis. 相似文献