排序方式： 共有21条查询结果，搜索用时 15 毫秒
1.
The paper analyses results of the numerical simulation of upwelling events in the north-western part of the Black Sea, mostly
near the South Crimea. The calculations were performed using a numerical model based on primitive hydrodynamics equations.
Emphasis is laid on the case when a salinity front simulating the Black Sea rim current is prescribed in the initial conditions.
The interaction of the Black Sea rim current's stream with the coastline and bottom topography leads to the development of
an upwelling near the Crimea's coast, even in the absence of wind forcing. The paper discusses the structure of the three-dimensional
circulation of waters in the shelf area of the NW Black Sea. Numerical modelling results are matched up with the satellite
data obtained by the HRPT receiving station.
Translated by Vladimir A. Puchkin. 相似文献
2.
We analyze the statistical structure of the data of remote sensing of the fields of surface temperature and the concentration
of chlorophyll in the northwest part of the Black Sea with an aim to apply the method of optimal interpolation to the restoration
of the maps of these fields according to the restricted amounts of data. We determine the scales of smoothing for the selection
of the random components of the fields and estimate their difference from the statistical model uniform and isotropic over
the space correlation coefficients. The functions of spectral densities are constructed along various sections and the best
intervals of discretization of the fields required to perform the optimal interpolation with given accuracy are determined.
It is shown that the construction of the maps of fields under the conditions of controlled accuracy of reconstruction of their
values remains possible even if the amounts of the input satellite data are significantly decreased. We consider a procedure
of evaluation of the best possible amounts of data required for the use of the method of optimal interpolation. Some examples
of application of this procedure to the data of remote sensing of the fields of surface temperature and the concentration
of chlorophyll are presented. 相似文献
3.
T. V. Belonenko A. A. Kubrjakov S. V. Stanichny 《Izvestiya Atmospheric and Oceanic Physics》2016,52(9):920-928
Using satellite altimetry measurement data for 1993–2013, we study the spectral characteristics of Rossby waves in the Northwestern Pacific (25°–50° N, 140°–180° E). For each latitude degree, we draw integral plots of spectral power density calculated with a two-dimensional Fourier transform (2D-FFT). We compare the dispersion equations of Rossby waves calculated from the WKB-approximation and an approximation of a two-layer ocean model with the empirical velocities determined by the slope of isopleths by the Radon method; also, we compare the dispersion equations with the spectral distributions of level variations. It is shown that the main energy of Rossby waves in the Northwestern Pacific corresponds to the first baroclinic mode. At almost all latitudes, there is good agreement between the empirical phase velocities calculated by isopleths by the Radon method and the theoretical values; also, the spectral peaks correspond to graphs of the dispersion equations for the first baroclinic mode Rossby waves, except for the Kuroshio region, where some peaks correspond to the second mode. 相似文献
4.
A. Ya. Matveev A. A. Kubryakov A. G. Boev D. M. Bychkov V. K. Ivanov S. V. Stanichny V. N. Tsymbal 《Izvestiya Atmospheric and Oceanic Physics》2016,52(9):940-950
The possibilities of a multiangle method of radar diagnostics to determine thickness of an oil film on a sea surface by comparing the radar data with the quantitative modeling results obtained using the model of oil spreading dynamics are analyzed. The experimental results of the remote sensing of the Caspian Sea water area near the Neftyanye Kamni oil field by the Envisat-1 synthetic aperture radar (SAR) and the new Floating Objects Tracking System (FOTS) model of oil spreading are used for the analysis. The model allows to calculate the dynamics and change in the mass and size of an oil slick basing only on the available data of satellite measurements and atmospheric reanalysis.The model takes into account the main processes that influence the slick formation (gravity spreading, advective transport, dispersion, emulsification, turbulent mixing, and evaporation). This model is used to calculate the thickness evolution and dynamics of the displacement of oil slicks in the period between two consecutive radar images of this region (0.5–4 days) and to estimate the volumes of oil spilled in the field. The good consistence of the height of the oil film calculated using radar measurements and the modeling results confirms the method’s reliability. 相似文献
5.
Rubakina V. A. Kubryakov A. A. Stanichny S. V. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(9):950-961
Izvestiya, Atmospheric and Oceanic Physics - A comparative analysis of high time resolution data acquired by the SEVIRI scanner and temperature-profiling drifters during a multiyear period is... 相似文献
6.
Kubryakov A. A. Lishaev P. N. Chepyzhenko A. I. Aleskerova A. A. Kubryakova E. A. Medvedeva A. V. Stanichny S. V. 《Oceanology》2021,61(2):159-172
Oceanology - High-resolution measurements by unmanned aerial vehicles (UAVs), satellite and in-situ data are used to study the optical structure of coastal submesoscale eddies and their influence... 相似文献
7.
A. G. Zatsepin A. G. Ostrovskii V. V. Kremenetskiy V. B. Piotukh S. B. Kuklev L. V. Moskalenko O. I. Podymov V. I. Baranov A. O. Korzh S. V. Stanichny 《Izvestiya Atmospheric and Oceanic Physics》2013,49(6):659-673
Field studies performed at the Shirshov Institute of Oceanology, Russian Academy of Sciences (SIO RAS), Black Sea hydrophysical polygon in 2012 are illustrated. The variations in the vertical distribution of the hydrophysical characteristics (water temperature, salinity, and density, as well as current velocity) in the upper 200-m layer of the Black Sea above the continental slope in the cold season, obtained using an Aqualog autonomous profiler on a moored buoy station, have been analyzed. It has been established that the position of the permanent pycno-halocline and the hydrosulphuric zone upper boundary intensively oscillate with a characteristic period of 5–10 days. These oscillations cause short-period variations in the thickness of the oxigenated layer by 20–40 m, which reaches one-third of the total thickness of the layer. Measurements performed with autonomous stations (bottom ADCP, thermochain) at the experimental subsatellite polygon in the Gelendzhik coastal zone, as well as meteorological, ship, and satellite data obtained during the catastrophic rains and flooding on July 6–7, 2012, and afterward, have been simultaneously analyzed. It has been established that a catastrophic flow of turbid fresh water into the sea caused the formation of a belt of freshened (by 1.0–2.7 psu) less dense water with a high suspension concentration on the shelf and the upper continental slope. This water formed a quasi-geostrophic northwestward along-shore current, the velocity of which reached 40–50 cm/s. Therefore, the freshened and turbid water mostly escaped from the Gelendzhik region northwestward for two days after the flood, and the remaining water became free of suspension owing to its settlement during approximately the same period. The fields of the current velocity and suspension concentration in a submesoscale cyclonic eddy, identified on the satellite image, were measured at the hydrophysical polygon. It has been established that a high (when compared to the background values) suspension concentration in the surface-water layer in an eddy is related to intense upwelling at the eddy center and the rising of suspension (apparently phytoplankton) from the thermocline layer, where the suspension concentration is maximal. 相似文献
8.
9.
A. G. Zatsepin A. G. Ostrovskii V. V. Kremenetskiy S. S. Nizov V. B. Piotukh V. A. Soloviev D. A. Shvoev A. L. Tsibul’sky S. B. Kuklev O. N. Kukleva L. V. Moskalenko O. I. Podymov V. I. Baranov A. A. Kondrashov A. O. Korzh A. A. Kubryakov D. M. Soloviev S. V. Stanichny 《Izvestiya Atmospheric and Oceanic Physics》2014,50(1):13-25
The first data on the creation of the subsatellite polygon on the Black Sea shelf and continental slope in the Gelendzhik area (designed in order to permanently monitor the state of the aquatic environment and biota) and the plans for maintaining and developing this polygon are presented. The autonomous measuring systems of the polygon in the composition of bottom stations with acoustic Doppler current profilers (ADCP), Aqualog robotic profilers, and thermo-chains on moored buoy stations should make it possible to regularly obtain hydrophysical, hydrochemical, and bio-optical data with a high spatial-time resolution and transmit these data to the coastal center on a real-time basis. These field data should be used to study the characteristics and formation mechanisms of the marine environment and biota variability, as well as the water-exchange processes in the shelf-deep basin system, ocean-atmosphere coupling, and many other processes. These data are used to calibrate the satellite measurements and verify the water circulation numerical simulation. It is assumed to use these data in order to warn about the hazardous natural phenomena and control the marine environment state and its variation under the action of anthropogenic and natural factors, including climatic trends. It is planned to use the polygon subsatellite monitoring methods and equipment in other coastal areas, including other Black Sea sectors, in order to create a unified system for monitoring the Black Sea shelf-slope zone. 相似文献
10.
V. A. Alexeev V. V. Ivanov I. A. Repina O. Yu. Lavrova S. V. Stanichny 《Izvestiya Atmospheric and Oceanic Physics》2016,52(9):1064-1077
We discuss the possibility of detecting deep convection in the Lofoten Basin of the Norwegian Sea based on the eddy structures revealed from the satellite data. Satellite altimetry, SAR imagery, and MODIS satellite spectral radiometer sea-surface temperature (SST) data are used in the analysis, along with the data of oceanographic Argo floats. It is shown that the eddies identified from the satellite data correspond to the convective cells in the same region according to the data of the Argo floats. We consider several examples of the summer eddy and one winter eddy and the corresponding structures in the ocean measured by the Argo floats when they were located close to the identified eddies. As this method develops and improves, it can be used for the analysis of the dynamic of oceanic eddies in the region of the Lofoten Basin, and possibly in other regions with active deep convection. 相似文献