Hydrophysical and hydrochemical characteristics of the sea areas adjacent to the estuaries of small rivers of the Russian coast of the Black Sea     

P. O. Zavialov  P. N. Makkaveev  B. V. Konovalov  A. A. Osadchiev  P. V. Khlebopashev  V. V. Pelevin  A. B. Grabovskiy  A. S. Izhitskiy  I. V. Goncharenko  D. M. Soloviev  A. A. Polukhin 《Oceanology》2014,54(3):265-280

This paper presents the results of long-term in situ and satellite measurements at shelf areas adjacent to the estuaries of the small rivers of the Russian coast of the Black Sea (Mezyb, Pshada, Vulan, Tuapse, Bitkha, Sochi, Cudepsta, Mzymta). The quantitative characteristics of the response of the hydrophysical and hydrochemical fields at the sea shelf on the influence of the continental river discharge are presented for each of these areas. A number of indicators of the water quality (the concentrations of the nitrate and nitrite forms of nitrogen, the phosphorus, the silica, the dissolved oxygen, the value of the total alkalinity and pH, the mineral and organic suspended matter, and the chlorophyll a) are considered in the context of the anthropogenic and terrigenous influence. In this paper, the emphasis was placed on the Mzymta River plume at the shelf area adjacent to the city of Sochi, where the measurements were repeatedly performed during the spring flooding conditions in the period from 2007 until 2012. The interannual variability of the water quality indicators and the seasonal and short-term variability of the area and the configuration of the plume, which transports suspended matter and anthropogenic pollution, were considered.  相似文献   

Origin of Hydrocarbons in Suspended Matter and Bottom Sediments near the Crimean Peninsula     

Nemirovskaya  I. A.  Onegina  V. D.  Lisitzin  A. P.  Konovalov  B. V. 《Doklady Earth Sciences》2019,484(2):189-193

Doklady Earth Sciences - The study of hydrocarbons has shown that their content in the surface water of Feodosiya Gulf varies greatly (from 11 to 179 µg/L) and sometimes exceeds the maximal...  相似文献   

The distribution of oxygen and hydrogen sulfide in Black Sea waters during winter-spring period     

V. N. Eremeev  S. K. Konovalov  A. S. Romanov 《Physical Oceanography》1998,9(4):259-272

Regularities of oxygen and hydrogen sulfide are examined, using the method of spatial isopycnic analysis. The contribution that ventilation of winter-time surface waters over the domes of cyclonic gyres makes to the transfer of O₂ towards the upper boundary of the constant pycnocline and to the oxicline layer is demonstrated. The paper provides spatial scales of this phenomenon and indicates the areas where the upper boundary of the anoxic layer in the Black Sea, relative to the conventional density, is located much higher compared with the rest of the sea. The suboxic zone is shown to be a specific feature of the O₂/H₂S distribution in the Black Sea waters, typical, at least, of the northern part of the basin. Analysis of the suboxic spatial variability in the vertical has been conducted. Translated by Vladimir A. Puchkin.  相似文献   

Generation of long barotropic waves by moving baric disturbances in a system of basins connected by a channel     

A. V. Konovalov  T. G. Korotkova  L. V. Cherkesov 《Physical Oceanography》1999,10(1):1-9

We consider long barotropic waves in a system of two rectangular basins connected by a channel in the case where waves are generated by the moving region of disturbances of atmospheric pressure passing above one of the basins. By using a numerical model, we compute the characteristics of the wave process for various values of the parameters of this system. The results of numerical calculations are compared with the corresponding characteristics obtained for the case of a closed basin. We also analyze the distinctive features of long-wave processes induced in the presence of the channel. Translated by Peter V. Malyshev and Dmitry V. Malyshev  相似文献   

Earthworm-based automatic system for real-time calculation of local earthquake source parameters     

A. A. Stepnov  A. V. Konovalov  A. V. Gavrilov  K. A. Manaychev 《Seismic Instruments》2017,53(4):267-279

Experience in introduction of an automatic system of earthquake source parameter calculation based on an existing seismic network is described. Open source software products for automatic seismic data processing are reviewed. Methods for real-time waveform stream processing are discussed in detail. Parameters of some subroutines of the system are described. Information flows and data life cycle in the developed automatic system are outlined. Earthquake location errors in the system are analyzed. The detection capability of seismic networks is evaluated.  相似文献   

The moment tensors,focal mechanisms,and stresses on Sakhalin Island     

D. A. Safonov  T. V. Nagornykh  A. V. Konovalov  A. A. Stepnov 《Journal of Volcanology and Seismology》2017,11(3):225-234

We report determinations of the focal mechanisms for Sakhalin earthquakes during 2006 through 2015 by two different methods: the polarity of first motions using the FOCMEC program and the inversion of waveforms using the ISOLA program. We show that the resulting moment tensor solutions fairly well fit the tectonic crustal stresses for Sakhalin as determined by previous workers. We have examined the component of the moment tensor that involves a linear dipole. This is at its maximum in areas of active mud volcanism and industrial activities in oil-and-gas fields.  相似文献   

Content and Composition of Hydrocarbons in Water and Sediments in the Area of Kerch Strait     

Nemirovskaya  I. A.  Zavyalov  P. O.  Konovalov  B. V.  Khramtsova  A. V. 《Doklady Earth Sciences》2020,492(1):387-391

Doklady Earth Sciences - The results of studying the content and composition of aliphatic hydrocarbons (AHCs) and polycyclic aromatic hydrocarbons (PAHs) in the suspended particulate matter of the...  相似文献   

Clay Minerals in Basalt Sills from the Sediment Cover,East Pacific Rise     

V. B. Kurnosov  B. A. Sakharov  A. R. Geptner  Yu. I. Konovalov  E. O. Goncharov 《Lithology and Mineral Resources》2020,55(2):152-163

Clay minerals in basalt sills from the northern East Pacific Rise, covered by Upper Pleistocene clayey–sandy–silty sediments (turbidites, hemipelagites, and diatom oozes) sampled from DSDP Holes 477, 478, and 481A, were studied by X-ray methods based on the modeling of diffraction patterns. Trioctahedral smectites formed in thin (0.1–0.5 and 1.8–4 m) fissured sills that are well permeable for water delivered from the water-saturated host sediments heated by the sills. Smectites in basalts are found in the interstices (20–40 vol % in the rock and up to 50–80 vol % in hyalobasalts). They replace olivine and fill cracks and vesicles. Plagioclase and clinopyroxene are generally unaltered. The structure of smectites is characterized by different height of layers depending on the composition of cations in the interlayers and the degree of their hydration. The different-height layers either make up individual smectite phases or alternate in different proportions and with a high degree of segregation in the mixed-layer structures. Under conditions of a prolonged cooling, thick (43 m) sills are distinguished from the thin varieties by the formation of trioctahedral minerals (smectite–chlorite, chlorite, defective chlorite, and talc). They are found mainly in the interstices that make up 3–7 vol % of the rock.  相似文献   

The largest recent earthquake in the Upper Amur region on October 14, 2011: First results of multidisciplinary study     

A. I. Khanchuk  D. A. Safonov  Ya. B. Radziminovich  N. S. Kovalenko  A. V. Konovalov  N. V. Shestakov  V. G. Bykov  M. A. Serov  A. A. Sorokin 《Doklady Earth Sciences》2012,445(1):916-919

  相似文献   

Seasonal and spatial variability of the content of suspended organic substances in the active layer of the Black Sea     

Z. P. Burlakova  L. V. Eremeeva  S. K. Konovalov 《Physical Oceanography》2000,10(5):419-454

On the basis of the generalized data of multiannual observations (1985–1994), we analyze the seasonal variability of the vertical and spatial distributions and composition (C_sos, N_sos, C_sos/cha, and C/N) of suspended organic substances (SOS) in the shelf zone and in the upper active layer of the abyssal part of the Black Sea. The results of our analysis enable us to conclude that only a narrow coastal band of the shelf in the northwest and west parts of the sea suffers to an extremely pronounced anthropogenic impact, which manifests itself in a significant increase in the mass of suspended organic substances. The formation of new organic substances and, hence, the mass of suspended organic substances in these regions attain the level of eutrophic waters in the late-spring and summer periods. In the open-sea region, the anthropogenic impact is less pronounced and the spatial distribution of suspended organic substances is determined by the general dynamics of waters and the intensity of phytoplankton production. Translated by Peter V. Malyshev and Dmitry V. Malyshev  相似文献