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Найдено документов в текущей БД: 45

    Phytoplankton functioning in large freshwater systems differing in their resources
/ N.M. Mineyeva, L.A. Shchur, N.A. Bondarenko // Hydrobiological Journal. - 2012. - Vol. 48, Is. 5. - pp. 19-30, DOI 10.1615/HydrobJ.v48.i5.20 . - ISSN 0018-8166
Аннотация: Comparative analysis of the functional characteristics of phytoplankton of the Baikal and Khanka lakes, and also of the reservoirs of the Volga and Yenisey rivers, differing in their energetic and mineral resources has shown that their algae cenoses differ in the dimensional composition of dominant species. It has been found that the development of phytoplankton depends on the content of nutrients, its photosynthesizing activity - on the content of nutrients and light regime, whereas the intensity and relationship between the processes of production and decomposition - on hydrological conditions and morphometric peculiarities of water bodies. В© 2012 Begell House, Inc.

Scopus


Доп.точки доступа:
Mineyeva, N.M.; Shchur, L.A.; Щур, Людмила Александровна; Bondarenko, N.A.

    Comparative analysis of phytoplankton of the Baikal and Khanka lakes
[Text] / L.A. Shchur, N.A. Bondarenko // Hydrobiological Journal. - 2012. - Vol. 48, Is. 3. - pp. 14-23, DOI 10.1615/HydrobJ.v48.i3.20 . - ISSN 0018-8166
Аннотация: The structure and production potential of phytoplankton were studied in two large lakes of Asia, including the Baikal and Khanka lakes differing in their hydrological conditions. It has been found that the studied algae flora is saturated. The environmental conditions in the lakes are rather favorable to the development of algae. The functional characteristics of phytoplankton depended mainly on the regime of illumination, dimensional composition of algae, intensity of their development, vegetation stage, and also on the peculiarities of dominant forms biology. В© 2012 Begell House, Inc.

Scopus


Доп.точки доступа:
Shchur, L.A.; Щур, Людмила Александровна; Bondarenko, N.A.

    Some generalizations based on stratification and vertical mixing in meromictic Lake Shira, Russia, in the period 2002-2009
[Text] / D.Y. Rogozin [et al.] // Aquat. Ecol. - 2010. - Vol. 44, Is. 3. - pp. 485-496, DOI 10.1007/s10452-010-9328-6. - Cited References: 27. - We thank Mr. Fyodor Kozlov for assistance in winter lake surveys, Dr. Alexander Tolomeev and Dr. Egor Zadereev (Institute of Biophysics SD RAS) for field data of August 2006, Dr. Galina Kalacheva (Institute of Biophysics SD RAS) for ash content determination and all others who helped us in expeditions. We are also very grateful to Dr. Wolf Mooij (Netherlands Institute of Ecology) and two anonymous reviewers for valuable comments and advice on article preparation. This work was partly supported by the Netherlands Organization for Scientific Research, Grant 047.011.2004.030, the Russian Foundation for Basic Research, Grants No. 09-04-01114-a and 09-05-00915-a, by Siberian Branch of Russian Academy of Sciences, Integrative Project No. 95 and joint Taiwan-Siberian Project No. 149, by Russian Academy of Sciences, Program No. 23.15, by award No. PG07-002-1 of the Ministry of Education and Sciences of Russian Federation and U.S. Civilian Research & Development Foundation for the Independent States of the Former Soviet Union (CRDF). . - ISSN 1386-2588
РУБ Ecology + Limnology + Marine & Freshwater Biology
Рубрики:
PHOTOTROPHIC SULFUR BACTERIA
   MONO LAKE

   CHEMOCLINE

Кл.слова (ненормированные):
Meromixis -- Mixolimnion -- Oxic-anoxic interface -- Thermocline -- Weather conditions -- 1-D model

Аннотация: In a brackish, temperate, 24-m-deep Lake Shira, the profiles of salinity, temperature, oxygen and sulfide concentrations were measured on a seasonal basis from 2002 to 2009. The lake was shown to be meromictic with autumnal overturn restricted to mixolimnion. The depth of mixolimnion and position of oxic-anoxic interface varied annually. The spring mixing processes contribute to the formation of mixolimnion in autumn. The exceptionally windy spring of 2007 caused the deepening of mixolimnion in the winter of 2008. The winter position of oxic-anoxic interface was affected by the position of lower boundary of mixolimnion in all winters. The salinity in the winter mixolimnion increased compared with the autumn because of freezing out of salts from the upper water layers meters during ice formation and their dissolution in water below. The profiles of salinity and temperature were simulated by the mathematical 1-D model of temperature and salinity conditions taking into account ice formation. The simulated profiles generally coincided with the measured ones. The coincidence implies that simplified one-dimensional model can be applied to roughly describe salinity and density profiles and mixing behavior of Lake Shira.


Доп.точки доступа:
Rogozin, D.Y.; Genova, S.N.; Генова, Светлана Николаевна; Gulati, R.D.; Degermendzhy, A.G.

    Numerical modeling of vertical stratification of Lake Shira in summer
[Text] / P.V. Belolipetsky [et al.] // Aquat. Ecol. - 2010. - Vol. 44, Is. 3. - pp. 561-570, DOI 10.1007/s10452-010-9330-z. - Cited References: 35. - The study was financially supported by the Netherlands Organization for Scientific Research (NWO), Grant 047.011.2004.030, RFBR, Grant 05-05-89002; RFBR, Grant 07-01-00153; Multidisciplinary integration project of SB RAS No. 95. . - ISSN 1386-2588
РУБ Ecology + Limnology + Marine & Freshwater Biology

Аннотация: A one-dimensional numerical model and a two-dimensional numerical model of the hydrodynamic and thermal structure of Lake Shira during summer have been developed, with several original physical and numerical features. These models are well suited to simulate the formation and dynamics of vertical stratification and provide a basis for an ecological water-quality model of the lake. They allow for the quantification of the vertical mixing processes that govern not only the thermal structure but also the nutrient exchange, and more generally, the exchange of dissolved and particulate matter between different parts of the lake. The outcome of the calculations has been compared with the field data on vertical temperature and salinity distributions in Lake Shira. Lake Shira is meromictic and exhibits very stable annual stratification. The stratification is so stable because of the high salinity of the water. If the water in Lake Shira were fresh and other parameters (depth, volume, and meteorology) were the same, as now, the lake would be mixed in autumn. Using the newly developed models and using common meteorological parameters, we conclude that Lake Shira will remain stratified in autumn as long as the average salinity is higher than 3%.


Доп.точки доступа:
Belolipetsky, P.V.; Белолипецкий, Павел Викторович; Belolipetskii, V.M.; Белолипецкий, Виктор Михайлович; Genova, S.N.; Генова, Светлана Николаевна; Mooij, W.M.

    A one-dimensional model of vertical stratification of Lake Shira focussed on winter conditions and ice cover
[Text] / S.N. Genova [et al.] // Aquat. Ecol. - 2010. - Vol. 44, Is. 3. - pp. 571-584, DOI 10.1007/s10452-010-9327-7. - Cited References: 26. - The study was financially supported by the Netherlands Organization for Scientific Research (NOW), Grant 047.011.2004.030; RFBR, Grant 05-05-89002; RFBR, Grant 07-01-00153; Multidisciplinary integration project of SB RAS No. 95. . - ISSN 1386-2588
РУБ Ecology + Limnology + Marine & Freshwater Biology
Рубрики:
SEA ICE
   BACTERIA

   DEPTH

Кл.слова (ненормированные):
Convective mixed layer -- Ice formation -- Ice melting -- Simplified model -- Winter profiles

Аннотация: In meromictic lakes such as Lake Shira, horizontal inhomogeneity is small in comparison with vertical gradients. To determine the vertical distribution of temperature, salinity, and density of water in a deep zone of a Lake Shira, or other saline lakes, a one-dimensional (in vertical direction) mathematical model is presented. A special feature of this model is that it takes into account the process of ice formation. The model of ice formation is based on the one-phase Stefan problem with the linear temperature distribution in the solid phase. A convective mixed layer is formed under an ice cover due to salt extraction in the ice formation process. To obtain analytical solutions for the vertical distribution of temperature, salinity, and density of water, we use a scheme of vertical structure in the form of several layers. In spring, the ice melts as top and bottom. These processes are taken into account in the model. The calculated profiles of salinity and temperature of Shira Lake are in good agreement with field measurement data for each season. Additionally, we focussed on the redox zone, which is the zone in which the aerobic layers of a water column meet the anaerobic ones. Hyperactivity of plankton communities is observed in this zone in lakes with hydrogen sulphide monimolimnion, and Lake Shira is among them. The location of the redox zone in the lake, which is estimated from field measurements, coincides with a sharp increase in density (the pycnocline) during autumn and winter. During spring and summer, the redox zone is deeper than the pycnocline. The location of pycnocline calculated with the hydro physical model is in good agreement with field measurement data.


Доп.точки доступа:
Genova, S.N.; Генова, Светлана Николаевна; Belolipetskii, V.M.; Белолипецкий, Виктор Михайлович; Rogozin, D.Y.; Degermendzhy, A.G.; Mooij, W.M.

    Challenges and opportunities for integrating lake ecosystem modelling approaches
[Text] / W.M. Mooij [et al.] // Aquat. Ecol. - 2010. - Vol. 44, Is. 3. - pp. 633-667, DOI 10.1007/s10452-010-9339-3. - Cited References: 260. - WM, RG, IP, SG, PV and AD were supported by grant 047.017.012 of the Netherlands Organization for Scientific Research (NWO) and the Russian Foundation for Basic Research (RFBR). LDSD was supported by NWO grant 817.01.007. DT and EJ were supported by EU-REFRESH, EU-WISER, CLEAR (a Villum Kann Rasmussen Centre of Excellence Project on lake restoration) and CRES. We thank Prof. Andre De Roos for his insightful comments and Dr. Tom Andersen for his contribution to the text. JJ wishes to thank Drs. T. Aldenberg, Dr. L. Van Liere, Mr. M.J. 't Hart, Ir. M.H.J.L Jeuken, Ing. S. van Tol, Ir. J.S. Sloot and many others including the many people who provided lake data, for their contributions to PCLake. This is publication 4838 of the Netherlands Institute of Ecology (NIOO-KNAW). . - ISSN 1386-2588
РУБ Ecology + Limnology + Marine & Freshwater Biology

Аннотация: A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others ('reinventing the wheel'). The other challenge is to avoid focusing on only one type of model, while ignoring new and diverse approaches that have become available ('having tunnel vision'). In this paper, we aim at improving the awareness of existing models and knowledge of concurrent approaches in lake ecosystem modelling, without covering all possible model tools and avenues. First, we present a broad variety of modelling approaches. To illustrate these approaches, we give brief descriptions of rather arbitrarily selected sets of specific models. We deal with static models (steady state and regression models), complex dynamic models (CAEDYM, CE-QUAL-W2, Delft 3D-ECO, LakeMab, LakeWeb, MyLake, PCLake, PROTECH, SALMO), structurally dynamic models and minimal dynamic models. We also discuss a group of approaches that could all be classified as individual based: super-individual models (Piscator, Charisma), physiologically structured models, stage-structured models and traitbased models. We briefly mention genetic algorithms, neural networks, Kalman filters and fuzzy logic. Thereafter, we zoom in, as an in-depth example, on the multi-decadal development and application of the lake ecosystem model PCLake and related models (PCLake Metamodel, Lake Shira Model, IPH-TRIM3D-PCLake). In the discussion, we argue that while the historical development of each approach and model is understandable given its 'leading principle', there are many opportunities for combining approaches. We take the point of view that a single 'right' approach does not exist and should not be strived for. Instead, multiple modelling approaches, applied concurrently to a given problem, can help develop an integrative view on the functioning of lake ecosystems. We end with a set of specific recommendations that may be of help in the further development of lake ecosystem models.


Доп.точки доступа:
Mooij, W.M.; Trolle, D.; Jeppesen, E.; Arhonditsis, G.; Belolipetsky, P.V.; Белолипецкий, Павел Викторович; Chitamwebwa, D.B.R.; Degermendzhy, A.G.; DeAngelis, D.L.; Domis, L.N.D.; Downing, A.S.; Elliott, J.A.; Fragoso, C.R.; Gaedke, U.; Genova, S.N.; Генова, Светлана Николаевна; Gulati, R.D.; Hakanson, L.; Hamilton, D.P.; Hipsey, M.R.; 't Hoen, J.; Hulsmann, S.; Los, F.H.; Makler-Pick, V.; Petzoldt, T.; Prokopkin, I.G.; Rinke, K.; Schep, S.A.; Tominaga, K.; Van Dam, A.A.; Van Nes, E.H.; Wells, S.A.; Janse, J.H.

    Diatoms of some water bodies in northeastern West Siberia. Communication 1. Centrophyceae
[Text] / S.I. Genkal, L.A. Shchur, M.I. Yarushina // Contemp. Probl. Ecol. - 2010. - Vol. 3, Is. 4. - pp. 386-394, DOI 10.1134/S1995425510040041. - Cited References: 34. - The work was supported by Russian Foundation for Basic Research, grant no. 06-04-48173. . - ISSN 1995-4255
РУБ Ecology

Кл.слова (ненормированные):
West Siberia -- phytoplankton -- Bacillariophyta -- Centrophyceae

Аннотация: In the phytoplankton of northeastern West Siberian water bodies, Bacillariophyta were a dominant group of the 7 most abundant algal divisions, with the occurrence of the members of the class Centrophyceae varying from 27 to 100%. Scanning electron microscopy revealed complete species composition of the class Centrophyceae that dominates the phytoplankton of Lake Delingde, the Delingde and Bol'shaya Kheta rivers (Aulacoseira, 3 species; Cyclostephanos, 1; Cyclotella, 5; Discostella, 1; Melosira, 1; Pliocaenicus, 1; Puncticulata, 1; Stephanodiscus, 6). The phytoplankton of the class Centrophyceae in the Taz River now has a new member, Puncticulata radiosa. New species of the genus Cyclotella in West Siberian algal flora were revealed: C. arctica, C. comensis, and C. vorticosa. The findings helped more precisely define the ranges of the rare taxa and add new diagnostic features to the diagnoses of C. comensis and Stephanodiscus invisitatus.


Доп.точки доступа:
Genkal, S.I.; Генкал С.И.; Shchur, L.A.; Щур, Людмила Александровна; Yarushina, M.I.

    Numerical algorithm for studying wind flows two-dimensional in the vertical plane in stratified reservoirs
[Text] / V.M. Belolipetskii, P.V. Belolipetskii // Russ. J. Numer. Anal. Math. Model. - 2010. - Vol. 25, Is. 1. - pp. 1-14, DOI 10.1515/RJNAMM.2010.001. - Cited References: 13. - The work was supported by the Russian Foundation for Basic Research (07-01-00153) and Interdisciplinary Project No. 95 of the Siberian Branch of the Russian Academy of Sciences. . - ISSN 0927-6467
РУБ Engineering, Multidisciplinary + Mathematics, Applied

Аннотация: A system of equations of geophysical hydrothermodynamics of the ocean in the Boussinesq, hydrostatic, and 'rigid lid' approximations is used for description of stratified flows in landlocked reservoirs. A numerical algorithm is considered for flows two-dimensional in the vertical plane. This algorithm is based on the method of splitting with respect to physical processes, the finite element method, and the upstream difference scheme. The numerical algorithm has been checked on test problems. The model was used for determination of wind circulation and vertical distributions of temperature and salinity in the Shira Lake. The results of numerical modelling are in good agreement with actual data.


Доп.точки доступа:
Belolipetskii, V.M.; Белолипецкий, Виктор Михайлович; Belolipetskii, P.V.; Белолипецкий, Павел Викторович

    On some problems of convection in Lake Baikal
[Текст] : статья / V. B. Bekezhanova // Abstracts of Russian-French Workshop «Mathematical Hydrodynamics». - Irkutsk, 2011. - p. 9



Доп.точки доступа:
Бекежанова, Виктория Бахытовна

    On the instability of convective flow in cylinder and possible secondary regimes
[Text] / V. B. Bekezhanova, V. K. Andreev // Fluid Dyn. Res. - 2014. - Vol. 46, Is. 4. - Ст. 41417, DOI 10.1088/0169-5983/46/4/041417. - Cited References: 28. - This work was supported financially in part by the Russian Foundation for Basic Research (project No. 14-01-00067) and in part by the Siberian Branch of the Russian Academy of Sciences (complex integration project No. 38). The authors gratefully acknowledge the above-mentioned sponsorships. . - ISSN 0169-5983. - ISSN 1873-7005
РУБ Mechanics + Physics, Fluids & Plasmas

Аннотация: A new exact solution of equations of free convection is constructed in the framework of the Oberbeck-Boussinesq approximation. The solution contains an independent parameter and describes the flow of a viscous heat-conducting liquid in the vertical cylinder with large radius. Complex rheology and radiative heating are taken into account. The considered problem reduces to the operator equation with strongly nonlinear operator. The solvability of the operator problem is proved. The iterative procedure for finding the free parameter is suggested. Three different classes of solution are obtained with the help of the procedure. The linear stability of all classes of solutions is studied numerically. Critical thermal mode is isolated. Evolution of oscillatory mode depending on Prandtl number is investigated. It is shown that under small Prandtl numbers oscillatory modes decay. If Prandtl numbers are not small a new instability type appears. This instability is connected with growing thermal disturbances. Another instability mechanism is discovered in the short waves domain. In this case the crisis is attributed to growing hydrodynamical disturbances. Secondary regimes arising in the hydrodynamical mechanism of the stability loss are calculated.

WOS

Держатели документа:
[Bekezhanova, V. B.] Inst Computat Modelling SB RAS, Krasnoyarsk, Russia
Siberian Fed Univ, Inst Math & Fundamental Informat, Krasnoyarsk 660041, Russia
ИВМ СО РАН

Доп.точки доступа:
Bekezhanova, V.B.; Бекежанова, Виктория Бахытовна; Andreev, V.K.; Андреев, Виктор Константинович; Russian Foundation for Basic Research [14-01-00067]; Siberian Branch of the Russian Academy of Sciences [38]

    Estimate of the vertical plankton biomass profile on the basis of measurements of fluorescent characteristics in pelagial of Lake Baikal
/ M. V. Panchenko [et al.] // Proceedings of SPIE - The International Society for Optical Engineering. - 2014. - Vol. 9292: 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (23 June 2014 through 27 June 2014, ) Conference code: 110711. - Ст. 92922Y, DOI 10.1117/12.2075391 . -
Аннотация: We study the effect of physical, chemical and biological processes on gas exchange of CO2 in the air-water system in Lake Baikal. Photosynthesis of aquatic biota is known to play a crucial role in changing the concentration of carbon dioxide in the water. Fluorescent methods are considered to be of high performance in problems of determining quantitative characteristics of biomass, however they require preliminary calibration directly for a specific type of plankton. In the pelagic zone of Lake Baikal the species composition, quantitative and spatial distribution of phytoplankton are characterized by strong spatial and temporal variability. Therefore, the fluorescent devices calibration on a single reference does not provide acceptable accuracy of quantitative assessment of the biomass. The results discussed in the paper were obtained by shipboard measurements during the Baikal campaign of 2010-2011. Correlation between the biomass in 25-meter water layer and the integral value of the fluorescent signal in this layer was obtained for calibration. The report discusses the advantages and disadvantages of the chosen methods and the results of retrieval of the vertical profiles of the biomass for stations in the pelagic zone of Lake Baikal in spring for the 2010-2011 biennium.

Scopus

Держатели документа:
Institute of Atmospheric Optics, Siberian Branch, Russian Academy of SciencesTomsk, Russian Federation
Limnological Institute, Siberian Branch, Russian Academy of SciencesIrkutsk, Russian Federation
Institute of Computational Modeling, Siberian Branch, Russian Academy of SciencesKrasnoyarsk, Russian Federation

Доп.точки доступа:
Panchenko, M.V.; Sakirko, M.V.; Usoltseva, M.V.; Popovskaya, G.I.; Domysheva, V.M.; Shimaraev, M.N.; Zavoruev, V.V.; Pestunov, D.A.

    Observations of hydrophysical characteristics of stratified salt lake shira (Siberia) as an important part of its environmental monitoring
/ L. A. Kompaniets, T. V. Iakubailik // International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. - 2015. - Vol. 2: 15th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2015 (18 June 2015 through 24 June 2015, ) Conference code: 153969, Is. 3. - P635-642 . -
Аннотация: To understand the mechanisms of formation of water quality it is necessary to study both biological and chemical properties of a lake as well as its hydro regime. For many years researchers have focused on the study of chemistry and biology of Lake Shira (situated in Siberia), but a detailed investigation of its hydro regime has become possible only recently with the development of modern measuring instruments. Using the latest generation of measuring devices we have obtained the hydrophysical characteristics of the stratified salt lake in situ (air and water temperature, wind strength and direction, water velocity). Relationships between the measured data have allowed us to analyze the flow in the lake as a whole, thus outlining the problem of determining lake ecological status in the period under observation. © SGEM2014.

Scopus

Держатели документа:
ICM SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Yakubaylik, T.V.; Якубайлик, Татьяна Валерьевна; Компаниец, Лидия Алексеевна

    Assessment of changes in the qualitative composition and properties of dissolved organic matter on hydrooptical characteristics when fractional filtration of natural water
[Text] / P. V. Postnikova ; ed.: G. G. Matvienko, O. A. Romanovskii // 21ST INTERNATIONAL SYMPOSIUM ON ATMOSPHERIC AND OCEAN OPTICS: : SPIE-INT SOC OPTICAL ENGINEERING, 2015. - Vol. 9680: 21st International Symposium On Atmospheric and Ocean Optics - (JUN 22-26, 2015, Tomsk, RUSSIA). - Ст. UNSP 96802Y. - (Proceedings of SPIE), DOI 10.1117/12.2204892. - Cited References:12 . -
РУБ Engineering, Ocean + Meteorology & Atmospheric Sciences + Optics

Аннотация: The paper discusses the changes hydro-optical parameters that characterize the qualitative composition of dissolved organic matter (DOM), during fractional filtering though large (4.5 mu m and 1.76 mu m) and small (0.9 mu m) filters. A loess reservoir lake Khanka containing great amount of suspended inorganic matter were selected as the research object. In order to assess changes in the composition of the DOM the following parameters were selected: index of the degree exponent of absorption spectrum, the specific absorption coefficient, relative specific fluorescence yield and relative specific fluorescence,. The research has shown that not only the content of organic matter during adsorption on the surface of the suspension is changing during filtration, but also the composition.

WOS,
Scopus

Держатели документа:
Russian Acad Sci, Inst Computat Modelling, Siberian Branch, Krasnoyarsk, Russia.

Доп.точки доступа:
Matvienko, G.G. \ed.\; Romanovskii, O.A. \ed.\; Постникова, Полина Владимировна

    Baroclinic seiches for three-layer density stratification in the basin of rectangular shape
/ V. M. Belolipetskii [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2015. - Vol. 8, Is. 2. - P148-156 . - ISSN 1997-1397
Аннотация: The problem of linear baroclinic seiches in rectangular basin is considered. It is supposed that density is stratified into three layers. Internal waves are not taken into account. It is shown that one-dimensional model allows one to determine the positions of thermocline and halocline. The model also allows one to determine the values of temperature and salinity in the surface and bottom layers with satisfactory accuracy. Fluctuations of temperature and salinity in pycnocline are estimated by calculating parameters of baroclinic seiches. The results of calculations and measurements in Lake Shira are compared. © Siberian Federal University. All rights reserved.

Scopus,
Полный текст

Держатели документа:
Institute of Computational Modelling SB RAS, Akademgorodok, 50/44, Krasnoyarsk, Russian Federation
Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation
Institute of Biophysics SB RAS, Akademgorodok, 50/50, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belolipetskii, V.M.; Белолипецкий, Виктор Михайлович; Genova, S.N.; Генова, Светлана Николаевна; Degermendzhy, A.G.; Tolomeyev, A.P.

    OBSERVATIONS OF HYDROPHYSICAL CHARACTERISTICS OF STRATIFIED SALT LAKE SHIRA (SIBERIA) AS AN IMPORTANT PART OF ITS ENVIRONMENTAL MONITORING
[Text] / L. A. Kompaniets, T. V. Iakubailik // WATER RESOURCES, FOREST, MARINE AND OCEAN ECOSYSTEMS, SGEM 2015, VOL II : STEF92 TECHNOLOGY LTD, 2015. - 15th International Multidisciplinary Scientific Geoconference (SGEM) (JUN 18-24, 2015, Albena, BULGARIA). - P635-641. - (International Multidisciplinary Scientific GeoConference-SGEM). - Cited References:6 . -

Кл.слова (ненормированные):
salt lake -- measuring hydro-values in situ -- ecological condition

Аннотация: To understand the mechanisms of formation of water quality it is necessary to study both biological and chemical properties of a lake as well as its hydro regime. For many years researchers have focused on the study of chemistry and biology of Lake Shira (situated in Siberia), but a detailed investigation of its hydro regime has become possible only recently with the development of modern measuring instruments. Using the latest generation of measuring devices we have obtained the hydrophysical characteristics of the stratified salt lake in situ (air and water temperature, wind strength and direction, water velocity). Relationships between the measured data have allowed us to analyze the flow in the lake as a whole, thus outlining the problem of determining lake ecological status in the period under observation.

WOS

Держатели документа:
ICM SB RAS, Krasnoyarsk, Russia.

Доп.точки доступа:
Kompaniets, Lidiya A.; Компаниец, Лидия Алексеевна; Iakubailik, Tatiana V.; Якубайлик, Татьяна Валерьевна

    Three-dimensional hydrophysical numerical model of Lake Shira: regular computations based on the input data resulting from natural observations
[Text] : тезисы доклада / L. A. Kompaniets, T. V. Yakubaylik // International Conference Computational and Informational Technologies in Science, Ingenering and Education (CITech-2015). - 2015. - P66-67 . - ISBN 978-601-04-1389-4


РИНЦ,
Источник статьи

Держатели документа:
Institute of Computational Modelling SB RAS

Доп.точки доступа:
Yakubaylik, T.V.; Якубайлик, Татьяна Валерьевна; Компаниец, Лидия Алексеевна; International Conference Computational and Informational Technologies in Science, Ingenering and Education (CITech-2015) (2015 ; 24.09 - 27.09 ; Almaty)

    Modelling wind-induced summer circulation and thermal structure of lake Shira
[Text] : тезисы доклада / T. V. Yakubaylik, L. A. Kompaniets // Актуальные проблемы вычислительной и прикладной математики – 2015 : тезисы Международной конференции, посвященной 90-летию со дня рождения академика Г. И. Марчука. - Новосибирск : Институт вычислительной математики и математической геофизики СО РАН, 2015. - P75 . - ISBN 978-5-9907241-5-0


РИНЦ,
Источник статьи

Держатели документа:
Institute of Computational Modelling, Siberian Branch of the Russian Academy of Sciences

Доп.точки доступа:
Kompaniets, L.A.; Компаниец, Лидия Алексеевна; Якубайлик, Татьяна Валерьевна; Конструкторско-технологический институт вычислительной техники СО РАН; Новосибирский государственный университет; Институт цитологии и генетики СО РАНИнститут систем информатики им. А. П. Ершова СО РАН; Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН; Институт математики им. C.Л. Соболева СО РАН; Институт вычислительных технологий СО РАН; Институт вычислительной математики и математической геофизики СО РАН; Международная конференция "Актуальные проблемы вычислительной и прикладной математики – 2015", посвященная 90-летию со дня рождения академика Гурия Ивановича Марчука (2015 ; 19.10 - 23.10 ; Новосибирск)

    Relationships between the biomass and production of bacterio- and phytoplanktonic communities
/ A. D. Aponasenko, L. A. Shchur // Microbiology. - 2016. - Vol. 85, Is. 2. - P243-248, DOI 10.1134/S0026261716020028 . - ISSN 0026-2617
Аннотация: Quantitative ratios of the biomasses of bacterio- and phytoplankton, interrelation of their production characteristics, and association of the functional characteristics with environmental factors were studied for Lake Khanka, the Yenisei River, and the Krasnoyarsk Reservoir. The ratio between the biomasses of bacterioplankton (Bb) and phytoplankton (Bp) in these water bodies was shown to vary within the range exceeding three orders of magnitude. Bacterioplankton biomass was relatively stable and varied from sample to sample by an order of magnitude. In more than 50% of the samples (total sample number, 495), bacterioplankton biomass exceeded that of the phytoplankton. The average Bb/Bp ratios for Lake Khanka, Yenisei River, and Krasnoyarsk Reservoir were 5.1, 2, and 1.4, respectively. Increased Bb/Bp ratios were found to correlate with elevated specific (per unit biomass) phytoplankton production. This finding indicated additional supply of biogenic elements to phytoplankton due to their recycling by bacterial communities. The ratio between bacterioplankton and phytoplankton production for Lake Khanka varied from year to year (0.07 to 0.76). For the Yenisei River and the Krasnoyarsk Reservoir these ratios were on average 0.19 and 0.27, respectively. According to the literature data for other water bodies, bacterial production may reach from 10 to over 100% of the primary production. The equilibrium density of bacterioplankton (maximal density of the population) in Lake Khanka was ~1.5 times higher than in the Yenisei River and the Krasnoyarsk Reservoir due to higher content of suspended mineral matter and associated organo-mineral detritus in the lake. The interaction between dissolved organic compounds sorbed on the surface of mineral particles results in chemical alteration of biochemically stable substrate into compounds which may be assimilated by aquatic microorganisms. © 2016, Pleiades Publishing, Ltd.

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Держатели документа:
Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aponasenko, A. D.; Shchur, L. A.

    Change in the wind flow regime in stratified lakes
[Text] / V. M. Belolipetskii, P. V. Belolipetskii // J. Appl. Mech. Tech. Phys. - 2016. - Vol. 57, Is. 1. - P8-12, DOI 10.1134/S0021894416010028. - Cited References:4. - This work was supported by the Russian Foundation for Basic Research (Grant No. 14-01-00296). . - ISSN 0021-8944. - ISSN 1573-8620
РУБ Mechanics + Physics, Applied

Кл.слова (ненормированные):
stratified lakes -- wind flows -- criterion of change in flow regime

Аннотация: Wind flows in meromictic saline lakes in which the water column is not mixed to the bottom for at least one year are studied. This leads to the formation of upper and depth layers with small density gradients, between which there is a water layer with a large density gradient. It has been shown that, depending on the density stratification and the wind speed, wind flows (in the vertical plane) of two types are possible: with one or two circulation zones. For a two-layer lake model, a criterion for the change in the wind flow regime is proposed.

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Russian Acad Sci, Inst Computat Modeling, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Biophys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Belolipetskii, V. M.; Belolipetskii, P. V.; Russian Foundation for Basic Research [14-01-00296]

    A numerical model of the seasonal thawing of permafrost in the swamp-lake landscapes
/ V. M. Belolipetskii, S. N. Genova // J. Sib. Fed. Univ. Math. Phys. - 2016. - Vol. 9, Is. 2. - P158-165, DOI 10.17516/1997-1397-2016-9-2-158-165 . - ISSN 1997-1397

Кл.слова (ненормированные):
Permafrost -- Small dimensional numerical model -- Stefan’s problem -- Thawed and frozen soil

Аннотация: The theoretical description of the temperature field in the soils during freezing or thawing is carried out using solutions of Stefan’s problem. A mathematical model based on the equations of thermal conductivity for frozen and thawed layers. We consider the areas in which there are lakes or bogs. We distinguished the following layers in the vertical structure of the zone of permafrost: thawed soil, frozen soil, water, ice, snow. We offer a simplified numerical algorithm for solving of one-dimensional (in the vertical direction) heat conduction problems with moving boundaries of phase transition with the formation of new and cancellation of existing layers. A simplified numerical algorithm for solving one-dimensional (in the vertical direction) heat conduction problems with moving boundaries of phase transition with the formation of new and cancellation of existing layers is offering. © Siberian Federal University. All rights reserved.

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Держатели документа:
Institute of Computational Modelling SB RAS, Akademgorodok, 50/44, Krasnoyarsk, Russian Federation
Institute of Mathematics and Computer Science, Siberian Federal University, Svobodny, 79, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Belolipetskii, V. M.; Genova, S. N.