Vertical stability and the Brunt-Väisäla frequency of deep natural waters by the example of Lake Baikal, Lake Tanganyika, and the World Ocean

2009 ◽  
Vol 429 (2) ◽  
pp. 1553-1558 ◽  
Author(s):  
P. P. Sherstyankin ◽  
L. N. Kuimova
Keyword(s):  
Lake Baikal ◽  
Natural Waters ◽  
Lake Tanganyika ◽  
World Ocean ◽  
Baikal Lake ◽  
Vertical Stability ◽  
The World

scholarly journals Non-Equilibrium Uranium as an Indicator of Global Climate Variations—The World Ocean and Large Lakes

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3514
Author(s):  
Igor Tokarev ◽  
Evgeny Yakovlev
Keyword(s):  
Lake Baikal ◽  
Global Climate ◽  
Normal Component ◽  
World Ocean ◽  
Permafrost Degradation ◽  
Large Lakes ◽  
The World ◽  
Continental Runoff ◽  
Using Data ◽  
238U Ratio

In natural water, as a rule, there is a violation of radioactive equilibrium in the chain 238U … → 234U → 230Th →. Groundwater usually has a 234U/238U ratio in the range of 0.8–3.0 (by activity). However, in some regions, the 234U/238U ratio reaches >10 and up to 50. Ultrahigh excesses of 234U can be explained by climatic variations. During a cold period, minerals accumulate 234U as a normal component of the radioactive chain, and after the melting of permafrost, it is lost from the mineral lattice faster than 238U due to its higher geochemical mobility. This hypothesis was tested using data on the isotopic composition of uranium in the chemo- and bio-genic formations of the World Ocean and large lakes, which are reservoirs that accumulate continental runoff. The World Ocean has the most significant 234U enrichments in the polar and inland seas during periods of climatic warming in the Late Pleistocene and Holocene. In the bottom sediments of Lake Baikal, the 234U/238U ratio also increases during warm periods and significantly exceeds the 234U excess of the World Ocean. Furthermore, the 234U/238U ratio in the water of Lake Baikal and its tributaries increases from north to south following a decrease in the area of the continuous permafrost and has a seasonal variation with a maximum 234U/238U ratio in summer. The behavior of 234U in large water reservoirs is consistent with the hypothesis about the decisive influence of permafrost degradation on the anomalies in 234U/238U ratios in groundwater.

scholarly journals Environmental situation of Baikal Lake

2018 ◽  
Vol 144 ◽  
pp. 05008
Author(s):  
Varvara Shmalko ◽  
Elena Gogina
Keyword(s):  
Lake Baikal ◽  
Large Scale ◽  
Lake Ladoga ◽  
Ecological Situation ◽  
Natural Object ◽  
Baikal Lake ◽  
Water Lake ◽  
The World ◽  
Geographical Characteristics ◽  
Fresh Water Lake

This article considers the ecological situation, which has developed around a unique natural object - Lake Baikal. There are studied physical and geographical characteristics of this lake, because it is one of the greatest lakes in the world and the largest freshwater lake in Russia. Lake Baikal is 1.7 times larger the Lake Ladoga, the largest lake in Europe. Baikal is the largest fresh water lake in the world. Its volume is 23 600 cubic kilometers, which is about 20% of the planets’ fresh lake water - much more than in all the freshwater lakes of the world. There are described the most large-scale tributaries, which fill the lake, as well as the only river, flowing from it. There are studied basin areas of this valuable lake, which are under protection. There are four main periods identified by analyzing the dynamics of wastewater performances.

Kazakhstan’s Economic Growth in the Context of the World Economy

2006 ◽  
pp. 133-146 ◽  
Author(s):  
K. Arystanbekov
Keyword(s):  
Economic Growth ◽  
Economic Policy ◽  
World Economy ◽  
World Ocean ◽  
Direct Access ◽  
Crude Petroleum ◽  
Nation States ◽  
The World ◽  
The Relationship

Kazakhstan’s economic policy results in 1995-2005 are considered in the article. In particular, the analysis of the relationship between economic growth and some indicators of nation states - population, territory, direct access to the World Ocean, and extraction of crude petroleum - is presented. Basic problems in the sphere of economic policy in Kazakhstan are formulated.

ON EVALUATION OF THE ROLE OF THERMAL AND WIND FACTORS FOR A PHYSICAL MODEL OF THE WORLD OCEAN GENERAL CIRCULATION SYSTEM

2019 ◽  
Vol 47 (3) ◽  
pp. 80-91
Author(s):  
V. G. Neiman
Keyword(s):  
Physical Model ◽  
Ocean Circulation ◽  
General Circulation ◽  
World Ocean ◽  
Circulation System ◽  
The Public ◽  
The World ◽  
Almost All ◽  
Conceptual Foundations

The main content of the work consists of certain systematization and addition of longexisting, but eventually deformed and partly lost qualitative ideas about the role of thermal and wind factors that determine the physical mechanism of the World Ocean’s General Circulation System (OGCS). It is noted that the conceptual foundations of the theory of the OGCS in one form or another are contained in the works of many well-known hydrophysicists of the last century, but the aggregate, logically coherent description of the key factors determining the physical model of the OGCS in the public literature is not so easy to find. An attempt is made to clarify and concretize some general ideas about the two key blocks that form the basis of an adequate physical model of the system of oceanic water masses motion in a climatic scale. Attention is drawn to the fact that when analyzing the OGCS it is necessary to take into account not only immediate but also indirect effects of thermal and wind factors on the ocean surface. In conclusion, it is noted that, in the end, by the uneven flow of heat to the surface of the ocean can be explained the nature of both external and almost all internal factors, in one way or another contributing to the excitation of the general, or climatic, ocean circulation.

Revised Chronology of Neogene DSDP Holes from the World Ocean

1995 ◽  
Author(s):  
D. Lazarus ◽  
C. Spencer-Cervato ◽  
M. Pika-Biolzi ◽  
J.P. Beckmann ◽  
K. von Salis ◽  
...  
Keyword(s):  
World Ocean ◽  
The World

Comparative analysis and interpretation of grace and grace-fo data

2020 ◽  
Vol 4 ◽  
pp. 101-106
Author(s):  
Konstantin Simonov ◽  
◽  
Alexander Matsulev
Keyword(s):  
Comparative Analysis ◽  
World Ocean ◽  
Satellite System ◽  
Data Archive ◽  
Space Systems ◽  
Satellite Measurements ◽  
Digital Maps ◽  
The World ◽  
Grace Mission ◽  
Anomalous State

The study is devoted to the analysis of the features of the change in the Equivalent Water Height (EWH) parameter over the geoid based on satellite measurements of space systems. The study used the GRACE and GRACE-FO satellite data archive. The assessment was carried out on Earth as a whole, including land areas and the World Ocean. Interpretation of the anomalous state of the geoenvironment is performed using digital maps of the spatial distribution of the EWH parameter based on the histogram approach and correlation analysis. Also, a comparative analysis of the studied data from the GRACE mission and data from the new GRACE-FO satellite system launched into orbit in the summer of 2018 was carried out.

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