O. Lavrova - IEEE Xplore Author Profile

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This work attempts to expand the understanding of the whole picture of the Caspian Sea surface oil pollution and its sources. We present results based on satellite SAR and VIS data obtained in 2015–2020. The paper focuses on the sea surface's oil slicks caused by natural hydrocarbon seepages at the seabed. We discuss the applicability of satellite remote sensing methods for obtaining spatial and t...Show More
Wind-driven fluctuations of seawater level are often a danger to coastal regions. The work investigates the utility of satellite multispectral optical sensors for operational diagnostics of wind setup/setdown consequences such as coast flooding and sea bottom drying. A technique to monitor such events was elaborated using the case of an extreme wind setdown in the Taganrog Bay of the Azov Sea in N...Show More
In recent years, newly launched satellite sensors have provided data enabling qualitatively higher level of remote sensing of oceanic processes. Better spatial resolution of the data allows examining finer scales down to a few meters; it is now possible to compare radar and optical data obtained almost simultaneously over the same region at close high spatial resolutions; smaller time intervals be...Show More
We present results of observations of internal waves (IW) on the river plumes caused by the spread of the front of fresh waters, based on satellite images of the visible range obtained by Sentinel-2A Multispectral Imager Instrument (MSI/S2) and Landsat-8 Operational Land Imager (OLI/L8) instruments. Due to the high spatial resolution of these satellite data, submesoscale IWs having wavelengths les...Show More
The paper discusses our studies of oil pollution due to natural hydrocarbon seeps on the seafloor in the South-Eastern Black Sea. The patterns of surface oil pollution of the South-Eastern Black Sea are analyzed and described. Trajectories of oil slicks from seabed seepages are analyzed on the base of satellite remote sensing data for 2010-2017. The quantitative assessment of inter-annual, seasona...Show More
The influence of wind and hydrodynamic processes on the spreading of turbid waters from the Vistula Lagoon into the Baltic Sea was studied. Our research is based on joint analyses of remote sensing data and those from concurrent in situ measurements of the three-dimensional structure of the outflow. A strong difference in the water optical properties of the Baltic Sea and the Vistula Lagoon caused...Show More
The influence of wind and hydrodynamic processes on spreading of turbid waters from the Vistula Lagoon into the Baltic Sea was studied. The research was based on joint analysis of remote sensing data, simultaneous subsatellite measurements and numerical modeling. The sharp difference in water optical properties of the Baltic Sea and the Vistula Lagoon, affected by intense summer bloom of cyanobact...Show More
The results of a long-term satellite monitoring of the Black Sea revealing sea surface pollution by oil as well as manifestations of biogenic and anthropogenic surface films are presented. The basic data are high-resolution radar images obtained by synthetic aperture radars onboard Envisat satellite (till the spring of 2012) and onboard Sentinel-1 satellite (starting from October, 2014). A large a...Show More
High-resolution Synthetic Aperture radar (SAR) images of coastal and off-coastal areas provide a nearly weather independent monitoring of small-scale oceanographic features. In this paper, we describe the advances, which have been achieved within the DTeddie project. Therefore, we present the application of formerly developed algorithms to high-resolution SAR data to estimate the sea surface curre...Show More
Manifestation of moving ships' wakes in satellite images of the sea surface in conditions of intense algae bloom is discussed. Long-living ship wakes, whose lengths sometimes reach two hundred kilometers, are manifested on radar images in the form of long narrow bright bands of high backscatter. Estimates of spatial and temporal characteristics of such wakes are made. Joint analysis of SAR, VIS an...Show More
The influence of algae bloom on microwave radar backscattering from surface wind waves and on gravity-capillary wave damping was studied experimentally in field experiment on the Gorky Water Reservour and in laboratory. It was obtained that the intensity of X-band radar backscattering decreased with phytoplankton concentration in the upper water layer. Samples of phytoplankton from the upper water...Show More
In present paper the satellite remote sensing data (obtained by Envisat ASAR, Terra and Aqua MODIS, and NOAA AVHRR instruments) is used to study coastal dynamics of the north-eastern Black Sea. Surface manifestations of internal wave (IW) packets were registered in ASAR images of the sea surface. Possible factors leading to the generation of non-tidal IWs are determined on the basis of joint analy...Show More
Our paper discusses satellite observations data for the north-eastern Black Sea. Our study is based on remote sensing satellite data obtained by ERS-2 SAR, Envisat ASAR, Terra and Aqua MODIS, and NOAA AVHRR instruments. The data from different sensors was analyzed jointly to investigate coastal water circulation and in particular the occurrence, evolution and drift of vortical structures. One resu...Show More
In June 2003 LUKOIL-Kaliningradmorneft initiated a pilot project, aimed to the complex monitoring of the southeastern Baltic Sea, in connection with a beginning of oil production at continental shelf of Russia in March 2004. Operational monitoring was performed in June 2004–November 2005 on the base of daily satellite remote sensing (AVHRR NOAA, MODIS, TOPEX/Poseidon, Jason-1, ENVISAT ASAR and RAD...Show More
Summer/autumn experiments conducted for the past four years by Space Research Institute RAS near Ghelendzhik, Black Sea shore, allowed to closely monitor sea and atmosphere dynamics in the region. Over 35 ERS-2 SAR images obtained exhibit large variety of important phenomena: atmospheric and oceanic fronts pollution and other slicks, atmospheric convection, vortices, lee patterns, etc. Available e...Show More
It is shown that the two polarizations of microwave radar signal at low grazing angles sense different scatterers: horizontally polarized signal scatters predominantly from steep waves, while vertically polarized one scatters primarily from free Bragg waves. Ocean radar images being sensitive to surface wind fluctuations may be treated as an indicator of atmospheric boundary layer conditions. Rada...Show More
The analysis of ERS-1/2 SAR data of the Bering Strait, obtained in summer 1995, 1998 and 2000 has allowed us to observe many important oceanic processes. These include meandering fronts and vortex activity (well pronounced in the eastern part of the Strait), a strong jet current at the Prince Wales Cape, and intrusions of the cold Chukchi Sea water (extensions of the Siberian Coastal Current) in t...Show More
The airborne side-looking radar images from archives of the Space Research Institute (Moscow, Russia) are used for internal wave studies. Effects of bottom relief, density and current fields on surface manifestations of internal waves are analyzed separately. The effect of bottom topography is found to be negligible for available data. Internal waves transformation by horizontal inhomogeneities of...Show More
Results of long-term remote sensing experiments performed between 1977-1992 by the Space Research Institute of the Russian Academy of Sciences in the northwestern Pacific and on the continental shelf off the eastern coast of the USA are presented. They have revealed dramatic differences in radar images of the ocean taken at the two polarizations. It appears that vertically (VV) polarized images ar...Show More
The application of airborne real aperture radar to the nonlinear interaction of ocean internal waves study is discussed. Three typical cases of nonlinear interaction manifestations of internal waves are analyzed qualitatively. A large data set of high resolution sea surface radar images taken by Space Research Institute is used. The data are collected during many years of experiments (1975-1992) i...Show More