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1.
In this paper the peculiarities of compiled oceanographic data sets, which consist primarily in the presence of some characteristic information as well as in the planned incomplete filling of the files with observations, are discussed. A number of special ways are suggested which essentially improve the packing density of computerized data without applying special archiving algorithms. The effectiveness of these methods has been tested by treating thein situ hydrological/chemical data file compiled in the Black Sea in 1988.Translated by Vladimir A. Puchkin. 相似文献
2.
Demidov A. B. Gagarin V. I. Eremeeva E. V. Artemiev V. A. Polukhin A. A. Shchuka S. A. Grigoriev A. V. Khrapko A. N. Flint M. V. 《Oceanology》2021,61(5):645-661
Oceanology - Spatial and vertical variability of primary production (PP) and Chl a were studied in the framework of the 76th cruise of R/V Akademik Mstislav Keldysh to the Kara Sea from July 7 to... 相似文献
3.
Microseismicity variations in space and time due to pore pressure changes in an inhomogeneous permeable sample are considered. The analysis is based on laboratory experiments performed to study the relation between acoustic emission (which corresponds to microseismic events in real scale) and pore pressure changes due to water injection into, or release from, a porous sample under load. The study showed not only some characteristics of microseismicity variations during non-stationary fluid flow but also the possibility to solve the inverse problem of estimating local permeability from variations of microseismic activity in a particular volume of the porous medium. 相似文献
4.
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 (Csos, Nsos, Csos/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
5.
Historical oceanographic databases are statistically treated to obtain the mean multi-annual oxygen deficit distributions in the 70–90 m layer for the four seasons of the year. Generalization of the results from 1596 measurements has shown that the oxygen deficit is maintained only at one 1°×1° square at a level of 70–90%. This fact is accounted for by the rise of waters in the cyclonic gyre area. Conversely, small oxygen deficit values in the coastal areas are related to the sinking of water, this being consistent with the pattern of vertical circulation in the sea.Translated by V. Puchkin. 相似文献
6.
V. E. Shemshura Z. Z. Finenko Z. P. Burlakova L. V. Eremeeva 《Physical Oceanography》1995,6(6):421-434
The method of bio-optical modelling of seawater is discussed in application to the passive remote sensing of an ocean within the optical wavelength range. The model implies the presence of two hydrobiological characteristics in the algorithm for the spectral composition of upward radiation, namely the phytoplankton pigment concentration and the total particulate organic matter. The method has been thoroughly tested. The data provided byin situ measurements in the areas accommodating waters of different types (from Case 1 and Case 2) and the modelling results, with the errors being considered, are in good agreement.Translated by Vladimir A. Puchkin. 相似文献
7.
In this paper some results obtained in the course of investigations of the hydrological and hydrochemical peculiarities of the tidal frontal zone and of the upwelling's frontal zone in the Guinean shelf area are reported. We have confirmed a direct influence of these zones on the bioproductive properties of the sea-water, suspension distribution, and the types and composition of bottom sediments.Translated by Vladimir A. Puchkin. 相似文献
8.
Relationships between the surface concentrations of phytoplankton pigments (C
ph), total suspended matter (C
sm), particulate organic carbon (C
poc), and total suspended phosphorus (C
sp), on the one hand, and the relative water transparency determined through the Secchi disc depth (z
d), on the other, are analysed using the data compiled in the Guinean coastal waters (Tabunsu and Tonkima river estuaries) during November–December 1990. The functions ofC
ph,C
sm=f(z
d) are matched up with the experimentally derived data, as well as with the model bio-optical state of seawater. The general regression equation has been calculated using the data characteristic of various types of water.Translated by Vladimir A. Puchkin. 相似文献
9.
On the basis of the analysis of the many-year data on the vertical distributions of particulate organic carbon and nitrogen, we compute their annual average amounts for three typical layers of water in the deep part of the Black Sea: for a layer located above the oxycline and characterized by the formation of new portions of particulate organic matter in the course of photosynthesis, inside the oxycline, where the major part of oxygen is consumed and the major part of the flux of particulate organic matter is oxidized, and for the upper part of the anoxic zone characterized by the most active microbiological processes of oxidation of the organic substances and production of sulfides. The available literature data on sedimentation traps are used to study the downward annual average fluxes of particulate organic matter from the euphotic zone into the oxycline and into the anaerobic zone. The seasonal variability of the amounts and fluxes of particulate carbon and nitrogen is revealed. 相似文献
10.
Using the data of long-term simultaneous optical, biological, and hydrological observations (1980–1993), particular features of the horizontal distribution of the transparency and the total particulate matter content and the contents of its organic components (organic carbon and nitrogen and chlorophyll a) and their variability in the surface water layer (0–5m) over the northwestern shelf and the adjacent abyssal part of the Black Sea in the autumn season are considered. The detritus/phytoplankton ratio in the particulate organic matter and their relative contents in the total particulate matter are calculated. The distributions of the transparency and particulate matter content were found to be in good agreement and both depend on the water dynamics. It was established that, during the period of the abrupt growth in the Black Sea water turbidity (in the early 1990s), a significant decrease in the transparency and an increase in the particulate matter content caused by the production-destruction processes were observed only in the central and southern regions of the sea. 相似文献