Climatic and Anthropogenic Variations in the Sulfide Distribution in the Black Sea     

S. K. Konovalov  V. N. Eremeev  A. M. Suvorov  A. Kh. Khaliulin  E. A. Godin 《Aquatic Geochemistry》1999,5(1):13-27

Information on the depth of the sulfide onset in the Black Sea has been analyzed for the period 1910–1995. Correlation between the depth of the sulfide onset and the density structure of the layer of the main pycnocline is significant for the entire period covered. Correlation coefficients (R) between the depth of the sulfide onset and the position of isopycnal surfaces in the layer of the main pycnocline vary, on average, 0.71–0.88. The average value of density (t) at the depth of sulfide onset, defined as a sulfide concentration equal to 3 M, is close to 16.17. Oscillations in the average depth of the sulfide onset range over 24 m and indicate that a steady-state trend does not occur. The period of these oscillations may occur over a century timescale. The dataset for the period 1960–1995 has been used to analyze temporal variations in concentrations of sulfide inside the anoxic zone of the Black Sea. The results of isopycnal analysis demonstrate that possible temporal variations in the average position of sulfide onset versus density (t) scale do not exceed 0.15, which is close to the limit of uncertainties for data obtained before 1988. In contrast, a prominent increase in sulfide concentration, as well as nutrient levels, within the anoxic zone is shown and is related to anthropogenic impact.  相似文献   

Weakly non-linear waves forced by atmospheric disturbances in a confined basin of variable depth     

A. V. Konovalov  Yu. V. Manilyuk  L. V. Cherkesov 《Physical Oceanography》1992,3(6):409-416

Forced weakly non-linear oscillations of a homogeneous non-viscous fluid in a confined basin of variable depth are considered in a long-wave approximation. Fluid oscillations are caused by time-periodic fluctuations of the atmospheric pressure, whose spatial distribution corresponds to the first mode of free linear waves.Translated by V. Puchkin.  相似文献   

Study of the influence of mud volcanoes on the contents of hydrogen sulfide and silicic acid in the Black Sea     

S. K. Konovalov  E. I. Ovsyany 《Physical Oceanography》2000,10(6):569-576

We consider data on the contents of hydrogen sulfide and silicic acid in waters of the Black Sea obtained in the course of field investigations during Cruise 4 of the R/VKiev. The special attention is given to the results of studying the influence of recently opened mud volcano manifestations on the chemical composition of benthic waters and, first of all, on the content of hydrogen sulfide. The data concerning the contents of hydrogen sulfide and silicic acid and the analysis of the relative chemical composition indicate the absence of any direct influence of mud volcanoes on the chemical composition of waters. At the same time, the investigations carried out confirmed the possibility of presence of distributed sources of hydrogen sulfide, which is a product of bacterial utilization of incoming hydrocarbons.  相似文献   

Millisecond-duration microwave burst observations with the SSRT fast data acquisition system   总被引：1，自引：0，他引：1  

A. T. Altyntsev  A. A. Dutov  V. V. Grechnev  S. K. Konovalov  B. B. Krissinel  E. G. Lisysian  V. G. Miller  Yu. M. Rosenkraukh  G. Ya. Smolkov  A. Magun 《Solar physics》1996,168(1):145-158

The hardware and software for the observation of millisecond bursts with the Siberian solar radio telescope (SSRT) at 5.2 cm is described. The multiprocessing computer and data acquisition system records 180 analog signals from the SSRT multichannel receiver every 7 milliseconds. The recorded information opens the opportunity to study the position, structure, and other characteristics of solar burst sources with high temporal and spatial resolution. Examples of the observations are presented and briefly discussed in order to illustrate the overall performance of the system.  相似文献