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1.
Maps of the boundary topography for anaerobic waters in the Black Sea are plotted for the summers of the 1920s and 1980s. The mean depths of the H2S boundary for this period are determined. It is shown that the variation in the distribution and average location of the hydrogen sulphide zone has remained constant for the last 60 years.Translated by Mikhail M. Trufanov. 相似文献
2.
This paper discusses the conclusion derived during a joint U.S—Turkey expedition on the R/VKrorr on the dramatic variations of the O2–H2S zone in the Black Sea observed over the last 20 years. This conclusion is shown to be invalid since it was based on a comparison of data obtained at two stations only (in 1969 and 1988) that was made in various regions and in different seasons. Examples are provided for the inter-seasonal and mesoscale variations of hydrophysical and hydrochemical characteristics in the O2–H2S zone which, as to their scales, are comparable to or even exceed the variations registered during the expedition ofKrorr.Translated by Mikhail M. Trufanov. 相似文献
3.
Peculiarities of the dynamics and the structure formation in the estuary run-off lenses have been analysed based on field data obtained at the Guinean coast (the central eastern Atlantic Ocean). Attention was paid to the processes of restratification, internal mixing, and exchange in the areas of the frontal zone of the run-off lens and the tidal frontal zone. The stabilization of the front of the estuary run-off lens by means of the periodic washing out of its forepart by tidal upwelling is described. The mechanisms of the energy transformation in the leading part of the lens have been revealed. Effects of run-off and loczalization of transformed waters in the small-scale frontal zones are found. The energy estimations represented will be useful in considering analogous phenomena in other coastal regions.Translated by Mikhail M. Trufanov. 相似文献
4.
A. A. Bezborodov S. L. Gokchen V. N. Eremeev I. T. Konuk A. K. Saidam E. M. Tirasin 《Physical Oceanography》1991,2(3):227-231
The hydrological and hydrochemical structures of the upper 300 m water column of the Black Sea in autumn 1988 have been studied. Regularities in the distribution of the physico-chemical characteristics in the zone of interaction between aerobic and anaerobic waters as well as the topography of the H2S zone boundary and its connection with a certain density gradient have been found.Translated by Mikhail M. Trufanov. 相似文献
5.
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
6.
We discuss the current state of the problem of experimental investigation of the bottom boundary layer of the Black Sea and
present the data on a new measuring complex (designed and constructed at the Marine Hydrophysical Institute and called the
OLT-D profilometer of the bottom layer) together with some results of its application. On the basis of the analysis of the
data on the distributions of geothermal fluxes and parameters of the bottom boundary layer in the deep-water part of the sea,
we deduce and justify the relations for the evaluation of the critical thickness of the bottom boundary layer as a function
of the intensities of geothermal fluxes. It is shown that the numerical results are in good agreement with the data of direct
measurements of the thickness of the bottom boundary layer.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
7.
V. N. Eremeev A. N. Zhukov A. A. Sizov 《Izvestiya Atmospheric and Oceanic Physics》2012,48(9):961-972
The results of investigations into the spatial variability of the Atlantic Ocean surface temperature field on interannual scales are presented. The analysis is based on monthly mean satellite data of the AVHRR Pathfinder Data JPL NOAA/NASA over 1985–2001. Specific features of the structure of the sea surface temperature (SST) fields averaged over 17 years, as well as fields of the gradient and variance of the SST time series, are described for each node of the data grid. It is shown with the use of the rhythmodynamic approach that spatial heat waves exist in the interannual variability of the SST field in two directions: zonal and meridional. 相似文献
8.
The effective gas exchange rate in whitecap formations, determined as the ratio of the total gas stream through the bubbles to the variation in the concentration of the gas dissolved in sea-water from that balanced with the atmosphere, is calculated for nitrogen and oxygen. The gas stream was determined from experimentally derived data on the distribution of air bubbles in the whitecap using remotein situ macrophotography. The dependence of the gas exchange rate on the relative saturation of the water with gas and the wind velocity is analysed. The gas exchange rate in whitecap formations for nitrogen is three times that for oxygen.Translated by Mikhail M. Trufanov. 相似文献
9.
We analyse the time variability of the fields of Cs-137 concentration in the surface waters of the Black and Mediterranean
Seas in 1986–1998. It is shown that more contaminated Black-Sea waters affect the levels of concentration of this radionuclide
in the east part of the Mediterranean Sea. We also study the influence of atmospheric processes and water exchange through
Bosporus on the radioecological situation in the east part of the Mediterranean Sea and its coastal area.
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
10.
The changes in the field of the Arabian Sea level anomaly and the geostrophic currents are analyzed based on the data of satellite altimetry measurements in 1993–2008 within the framework of the AVISO project. On the intra-annual scale, the current field generally agrees with the circulation schemes published in a number earlier works. Their differences are due to the occurrence of the mesoscale eddies and jet currents revealed by the authors. 相似文献