Laboratory and marine study of photoluminescent sensors of oxygen dissolved in seawater     

V. L. Vlasov  B. V. Konovalov  V. E. Mosharov  V. N. Radchenko  S. A. Khanaev  D. V. Khlebnikov 《Oceanology》2010,50(1):121-130

The laboratory and marine study of photoluminescent sensors developed at the TsAGI has been conducted to create a highly sensitivity gauge of the oxygen dissolved in seawater. The advantages of the photoluminescent gauge over the electrochemical ones are the following: zero sensitivity to electromagnetic fields, the pH of the water, and the hydrogen sulphide and ions of heavy metals in the water; zero oxygen consumption; and no need for the water to be pumped through the device.  相似文献   

Variations in a set of optical and hydrologic parameters of the Atlantic surface waters     

L. I. Koprova  B. V. Konovalov  V. V. Pelevin  D. V. Khlebnikov 《Izvestiya Atmospheric and Oceanic Physics》2010,46(2):192-207

A complex analysis of the hydrooptical and dynamic parameters of the Atlantic surface waters has been made on the basis of experimental data. It is shown that the structural properties of the distribution of the basic hydrooptical parameters—such as the optical water-type index m (according to Prof. V.N. Pelevin’s classification), surface-water transparency (the depth of white-disc visibility Z _σ), circulation parameter (the dynamic height D at a depth of 100 m), and flow fields—are similar. On the basis of this, in the authors’ previous studies, relations between these parameters were obtained and the empirical dependences Z _σ(m) and D(m) were found. These dependences and the earlier obtained relationships between biological and optical parameters-chlorophyll concentrations c _p (m) and the indices of light attenuation by a soluted “yellow substance” a _ys (m) and suspended matter a _sm (m)—were combined and formed the basis of a method to determine them at any point of the open ocean from the measured (also remotely) parameter m. The results of the measurements of hydro-optical parameters (which were taken as part of the Meridian project from the Akademik Ioffe during its 14th voyage in October-November 2003) supported the validity of calculations of variations in the five parameters indicated above from the values of the index m. Thus, the efficiency of the developed rapid method of estimating variations in a set of parameters according to the optical water-type index m was demonstrated. In addition, the water’s “health” index H _w proposed by Pelevin in 2002, which is equal to the ratio between chlorophyll concentrations and soluted yellow substance, proved to be efficient at identifying the ecological state of the near-surface waters.  相似文献   

Tsunami waves in the Black Sea in 1927: Observations and numerical modelling     

S. F. Dotsenko  A. V. Konovalov 《Physical Oceanography》1996,7(6):389-401

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Simulation of triggering and geodeformation processes induced by fluid injection into the geomedium     

A. E. Zabolotin  A. V. Loskutov  A. V. Konovalov  S. B. Turuntaev 《Russian Journal of Pacific Geology》2016,10(6):417-426

A module for simulation of seismic and geodeformation processes when fluid is injected into and extracted from the geomedium is developed. Calculation of the stress–strain state of the geomedium involves a modified Biot model that takes the rate of bulk strain in the Darcy equation into account. For software implementation of the module simulating the processes during fluid motion in terms of the Biot model, we applied the OpenFOAM 2.4.0 free package of C++ libraries. This package is a set of compiled modules and their source codes; the latter encapsulate all of the most commonly used objects and operations from computational continuum mechanics in accordance with the principles of object-oriented programming. Development of the stress calculation module is based on the standard solver for elastic deformation of an isotropic body from the OpenFOAM package. Its code was supplemented with the procedure of discretization and solution of the Darcy equation for pore pressure. Geodeformation effects are estimated by direct calculation of free surface displacements near the sources of fluid injection and extraction; these displacements can lead, in particular, to dangerous subsidence and induced seismicity. Triggering seismic effects are estimated by calculation of the accumulation rate for excessive tangential stresses in a fault zone at the depth of the seismogenic layer (5–15 km), with the ratios linking the historical seismicity and the tectonic stress accumulation rate in terms of the modified Dietrich’s model being taken into account. Seismological validation of the possible maximum magnitudes of technogenic earthquakes and their recurrence periods in the NE Sakhalin region of intensive oil and gas development is performed. The models of seismic process activation during technogenic impacts on the geomedium are specified.  相似文献   

A detailed study of the rupture zone of the MW 5.8 March 16, 2010 Earthquake at Northwestern Sakhalin Island     

A. V. Konovalov  E. P. Semenova  D. A. Safonov 《Journal of Volcanology and Seismology》2012,6(4):243-253

An earthquake of magnitude M_W = 5.8 occurred in the upper reaches of the Uanga and Pogibi rivers in northwestern Sakhalin at 9 h 44 min WT on March 16, 2010. The event is the largest for the northwestern part of the island during the entire history of instrumental seismological observations that have been conducted on Sakhalin since 1905. A macroseismic study showed that the earthquake was felt in much of northern Sakhalin and the Amur River area. This paper presents the results from a detailed study of the seismicity in the rupture zone, the space-time distribution of aftershocks, and their relationships to the active fault zones that exist in northern Sakhalin. Some new results were obtained that concern the interrelationships between the focal mechanism and the present-day geodynamic setting.  相似文献   

SEISAN software application for developing an automated seismological data analysis workstation     

A. V. Konovalov  A. A. Stepnov  V. N. Patrikeev 《Seismic Instruments》2012,48(3):270-281

The key stages of automation of routine earthquake data processing are described. The software, technologies, and equipment are specified. The method for determining earthquake source parameters is considered in details. The experience in the seismological data interpretation taking recent velocity profiles of the region into account is demonstrated and the determination accuracy is justified. The information about the configuration of the local network of seismic stations and the velocity structure of the earth??s crust in the north of Sakhalin Island is presented.  相似文献   

Spatial variability of concentrations of chlorophyll <Emphasis Type="Italic">a</Emphasis>, dissolved organic matter and suspended particles in the surface layer of the Kara Sea in September 2011 from lidar data     

V. V. Pelevin  P. O. Zavjalov  N. A. Belyaev  B. V. Konovalov  M. D. Kravchishina  S. A. Mosharov 《Oceanology》2017,57(1):165-173

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Spectrophotometric and iodometric methods for the detection of hydrogen sulfide in the Black Sea: Comparison of the results of analysis     

S. K. Konovalov  A. S. Romanov 《Physical Oceanography》2000,10(4):365-377

We discuss the results of analysis of published data and field and laboratory investigations aimed at the solution of the problem of comparabilityof the results of detection of hydrogen sulfide in the Black Sea by spectrophotometric and iodometric methods. We show that the reproducibility of the results of spectrophotometric analysis is higher than hat of the iodometric method only in the case where the content of sulfide in a sample is less than 10–30 μMl⁻¹. When larger concentrations are involved, the traditional iodometric analysis proves to be the most precise and reliable method for the detection of hydrogen sulfide in the Black-Sea waters. Translated by Peter V. Malyshev and Dmitry V. Malyshev  相似文献   

The <Emphasis Type="Italic">M</Emphasis><Subscript><Emphasis Type="Italic">w</Emphasis></Subscript> = 5.8 14 August 2016 middle Sakhalin earthquake on a boundary between Okhotsk and Eurasian (Amurian) plates     

A. V. Konovalov  A. A. Stepnov  D. A. Safonov  A. I. Kozhurin  A. S. Pavlov  A. V. Gavrilov  K. A. Manaychev  D. Ye. Tomilev  H. Takahashi  M. Ichiyanagi 《Journal of Seismology》2018,22(4):943-955

An earthquake with the moment magnitude M _w ?=?5.8 occurred in the middle part of the Sakhalin Island, Russian Federation, on 14 August 2016, at 11:17 a.m. UTC. The earthquake source was located west of the Central Sakhalin Fault Zone, which is considered to mark the boundary between the Okhotsk and Eurasian (Amurian) plates. Moment tensor solution of the mainshock as well as the configuration of aftershock cloud suggests that the earthquake was caused by slip on a SW-dipping reverse fault. For the first time for Sakhalin, we have got the felt reports unified in accordance with DYFI. We also analyzed observed PGA values and, based on them, produced shaking maps.  相似文献   

The Concentrations and Composition of Hydrocarbons in Ural River Mouth Zone during Spring Flood     

Nemirovskaya  I. A.  Konovalov  B. V. 《Water Resources》2019,46(3):427-431

Water Resources - High concentrations of hydrocarbons in suspension in surface water were recorded in the mouth area of the Ural River during spring flood, where they averaged 198 (in 2016) and 270...  相似文献