Communities of charophytes in water bodies and water courses in the north of the endorheic basin of the Ob-Irtysh interfluve (Western Siberia)

2013 ◽  
Vol 6 (3) ◽  
pp. 184-193 ◽  
Author(s):  
L. M. Kipriyanova ◽  
R. E. Romanov
Keyword(s):  
Western Siberia ◽  
Water Bodies ◽  
The North ◽  
Water Courses ◽  
Endorheic Basin

scholarly journals PHYTOPLANKTON OF SURFACE WATERS UNDER OIL POLLUTION (SAMOTLOR FIELD, WESTERN SIBERIA)

2019 ◽  
Vol 16 (32) ◽  
pp. 306-320
Author(s):  
O. N. SKOROBOGATOVA ◽  
E. R. YUMAGULOVA ◽  
T. V. STORCHAK ◽  
N. A. IVANOVA
Keyword(s):  
Surface Waters ◽  
Western Siberia ◽  
Oil Pollution ◽  
Floristic Composition ◽  
Ammonium Nitrogen ◽  
Water Bodies ◽  
Freshwater Phytoplankton ◽  
The North ◽  
Chemical Composition Of Water ◽  
Analytical Review

The study of freshwater phytoplankton of the Samotlor field is associated with intense oil production and fragmentary reports on the state of wetland communities in the north of Western Siberia. The obtained data expands and complements the information about algae in extreme conditions. The goal of this research is to study the structure of the phytoplankton of high-latitude water bodies under oil pollution. The method of chemical-analytical studies in surface waters revealed excess standards in 2-62 times. By the amount of ammonium nitrogen, the studied water bodies are classified as polluted and very polluted. The amount of sulfates, nitrates, and phosphates in all water samples is lower than the standard MPCfw. During the microscopic examination, 88 algae from 48 genera, 29 families, 10 classes and 7 divisions were found. The basis of the floristic composition consists of Bacillariophyta, Euglenophyta and Chlorophyta. One dominant species (Kolbe-Visloukh method) and seven subdominants were identified. The most successful algae in plankton make up 4.5%. The analytical review showed the predominance of planktonic algae, which are indifferent to salinity and pH, cosmopolitan and ?-mesosaprobic in terms of saprobity. According to the data obtained, a significant deviation of parameters in the chemical composition of water, as well as in the structure dominants, and abundance of phytoplankton from the regional norm, was identified. Phytoplankton under oil pollution is poor in composition, and a significant number of large taxa with a small number of species emphasizes the complexity of the fluorogenic processes in the waters of the Samotlor field. The materials can be applied in a comprehensive study of water bodies, their typological characteristics, in the organization of environmental monitoring and the development of measures to protect aquatic ecosystems from pollution and eutrophication.

РАДИОУГЛЕРОДНЫЕ ДАТИРОВКИ ПАЛЕОНТОЛОГИЧЕСКИХ ОБРАЗЦОВ ВЕРХНЕГО ПЛЕЙСТОЦЕНА НИЖНЕЙ ОБИ

2020 ◽  
Author(s):  
I. Zolnikov ◽  
◽  
A. Vybornov ◽  
A. Anoikin ◽  
A. Postnov ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Rangifer Tarandus ◽  
Western Siberia ◽  
Budker Institute ◽  
Mammuthus Primigenius ◽  
Upper Pleistocene ◽  
Ovibos Moschatus ◽  
The North

In the course of studies conducted by IAET SB RAS in the Lower Ob in 2016–2019, the understanding of the conditions for settlement of the Paleolithic population in the north of Western Siberia was significantly supplemented. Dating of a series of paleontological finds was carried out at the "Accelerated mass spectrometer of the Budker Institute of Nucle- ar Physics of SB RAS". The dates obtained show the distribution of the main representatives of the Upper Pleistocene fauna of Subarctica: Mammuthus primigenius – 50,000–15,000 BP, Coelodonta antiquitatis – 43,000–38,000 BP and 27,000–25,000 BP, Rangifer tarandus, Equus ferus – 40,000–10,000 BP, Bison sp. – 50,000–40,000 BP, Ovibos moschatus – 41,000–32,000 BP.

Scientific and technological aspects and prospects for application of cryogenic drilling technology

2020 ◽  
pp. 54-62
Author(s):  
A. B. Tulubaev ◽  
E. V. Panikarovskii
Keyword(s):  
Low Temperatures ◽  
Western Siberia ◽  
Wellbore Stability ◽  
Drilling Mud ◽  
Chemical Reagent ◽  
Production Chain ◽  
Foreign Experience ◽  
Permafrost Rocks ◽  
The North ◽  
Drilling Technology

In the article, we analyze types of drilling mud, which are used to drilling intervals of permafrost rocks; the importance of wellbore stability is noted. Wedescribethemain technologies, which have been being applied in the north of Western Siberia; these technologies are aimed at minimizing the loss wellbore stability due to violation of the temperature conditions in the well. We also analyze hydrocarbon systems, taking into account foreign experience, which is based on prospecting and exploratory drilling of ice deposits in Greenland and Antarctica. The article draws your attention to using synthetic fluids, monoesters and chladones. The difficulties of the existing technology and the disadvantages of the hydrocarbon systems are highlighted. We propose to apply a new cryogenic drilling technology, which consists in the use of synthetic fluorine-containing agents as flushing fluid at low temperatures. The text gives valuable information on composition of the proposed flushing fluid and the prospects of using the technology to prevent complications. Much attention is given to issue of manufacturing the main chemical reagent with the reduction of the generalized production chain of its production from the starting material, it is fluorspar.

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