Using Natural Stable Hydrogen and Oxygen Isotopes for Studying the Conditions of Ground Ice Formation   总被引：1，自引：0，他引：1  

Brezgunov  V. S.  Derevyagin  A. Yu.  Chizhov  A. B. 《Water Resources》2001,28(6):604-608

The isotopic composition of ground ice in lacustrine deposits of different age in the Taimyr Peninsula is discussed. It is shown that the combined use of two isotopic indicators (²H and ¹⁸O) provides additional information (unavailable when any of the isotopes is used alone) about the conditions of formation of segregated ground ice.  相似文献   

Basic Equations to Describe the Kinetic Isotope Effect during Microbial Substrate Transformation     

V. A. Vavilin  S. V. Rytov  V. S. Brezgunov 《Water Resources》2018,45(6):953-965

The redistribution of stable isotopes allows specifying the pathway of substrate utilization and identifying the relevant kinetic parameters. To describe degradation kinetics and identify predominant metabolic pathway for microbial substrate transformation, new basic equations, which take into account the dynamics of heavier isotope in the substrate, intermediates, and products were added to the common model of microbial substrate transformation, which did consider isotope differences at any step of substrate transformation. Using the unified approach, we showed that the dynamic changes of isotope fractionation depend on the kinetic coefficients, the initial conditions, and the microorganisms participating in the reactions during microbial denitrification, anaerobic oxidation of methane by sulphate and nitrite, aerobic oxidation of methane gas, and anaerobic digestion of cellulose.  相似文献   

Macro- and microelements in the interstitial water of deep-water areas of the Southern and Middle Caspian Sea     

V. S. Brezgunov  V. I. Ferronsky 《Water Resources》2010,37(6):825-833

The results of determinations of macro- and microelement concentrations (Mn, Fe, Ba, Sr, Rb, Si, Pb, and U) in the interstitial water in four cores of bottom sediments sampled in the deep-water areas of the Southern and Middle Caspian Sea are compared with the concentrations of these elements in the free water of the Caspian Sea. The data obtained amplify the present-day concept on the geochemical and ecological states of the sea.  相似文献   

Regularities in the spatial distribution of some macro-and microelements in the Caspian Sea water     

V. S. Brezgunov  V. I. Ferronskii 《Water Resources》2006,33(5):583-589

The distribution of some microelements (Sr, Si, Ba, Mo, Rb, and Mn) in the surface and deep-sea waters in various parts of the Caspian Sea is considered in comparison with the distribution of salt-forming macroelements. The observed mean concentrations of microelements and their variations over the sea area and with depth indicate to the presence of additional, other than Volga runoff, sources supplying Sr, Ba, U, Rb, and Mn to the Caspian Sea.  相似文献   

Vertical Water Exchange in the Caspian Sea Assessed by the Distribution of Transient Tracers     

Brezgunov  V. S. 《Water Resources》2019,46(5):703-708

Water Resources - The reliability of various scenarios of vertical structure formation in Caspian Sea water was analyzed based on the distribution of transient tracers (CFC-11, CFC-12, 3H, and 3He)...  相似文献   

Variations in the Hydrological Regime of Kara-Bogaz-Gol Gulf,Lake Issyk-Kul,and the Aral Sea Assessed Based on Data of Bottom Sediment Studies   总被引：1，自引：0，他引：1  

Ferronskii  V. I.  Polyakov  V. A.  Brezgunov  V. S.  Vlasova  L. S.  Karpychev  Yu. A.  Bobkov  A. F.  Romaniovskii  V. V.  Johnson  T.  Ricketts  D.  Rasmussen  K. 《Water Resources》2003,30(3):252-259

The isotopic and material composition of bottom deposits, examined in the Kara-Bogaz-Gol Gulf, Lake Issyk-Kul, and the Aral Sea, is considered. The obtained data are used to characterize variations in the regime of the water bodies in the Holocene.  相似文献   

Concentrations of Microelements in the Caspian Sea and Different Occurrence Types of Dissolved Elements in Marine Environment (Based on Expedition Data of 1995)     

Brezgunov  V. S.  Ferronskii  V. I. 《Water Resources》2004,31(1):68-72

Mean concentrations of microelements Mn, Rb, Sr, Mo, Ba, Fe, Cu, and U in the Caspian Sea evaluated based on the results of water sampling in 1995 are given. The obtained values are checked against the requirements to the characteristics of water bodies used for fishery.  相似文献   

Investigation of Water-Exchange Processes in the Caspian Sea on the Basis of Isotopic and Oceanographic Data     

Ferronsky  V. I.  Brezgunov  V. S.  Vlasova  L. S.  Polyakov  V. A.  Froehlich  K.  Rozansky  K. 《Water Resources》2003,30(1):10-22

Results of the sampling for temperature, salinity, and isotopic composition of water masses that was performed in the Caspian Sea at deepwater stations along a meridional profile during the international expeditions of 1994–1996 are presented. The water-exchange processes in this basin are analyzed on the basis of the distributions of salinity and isotopes in space and time.  相似文献   

Influence of the salinity of water on its evaporation     

G. N. Panin  V. S. Brezgunov 《Izvestiya Atmospheric and Oceanic Physics》2007,43(5):663-665

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Natural Tritium as an Indicator of Changes in the Vertical Structure of Caspian Sea Water Mass with Sea Level Variations     

V. S. Brezgunov  V. I. Ferronskii 《Water Resources》2005,32(4):365-368

Analysis of changes in the vertical distribution of tritium in the Caspian Sea water mass in 1994–1996 led to a conclusion that the sea level fall that started in 1996 was accompanied by a rearrangement of the water mass steady hydrological structure characteristic of the high sea-level stand.__________Translated from Vodnye Resursy, Vol. 32, No. 4, 2005, pp. 406–409.Original Russian Text Copyright © 2005 by Brezgunov, Ferronskii.  相似文献