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1.
The variations in average annual surface air temperature, precipitation, and runoff in the Selenga River basin (within Russia) are analyzed. It is demonstrated that the considerable increase in average annual temperature of surface air layers occurred in the 1980s-1990s. The decrease in peak water discharge in the rivers and the increase in the frequency of low-water periods were revealed in the forest-steppe and steppe zones of the Selenga River basin in 2001-2010. In the southwestern mountain regions (the Dzhida River basin) the river runoff increased during that period. 相似文献
2.
A. V. Tatarinov E. V. Danilova L. I. Yalovik D. D. Barkhutova Z. B. Namsaraev A. V. Bryanskaya A. M. Plyusnin 《Geochemistry International》2010,48(2):152-162
Hoito Gol hot spring of weakly mineralized warm (36–29°C) neutral and partly alkaline nitrogen-carbon dioxide waters belongs
to the hydrogeological structure of the actively water-flooded fault marked by the Sentsy River at the southwestern termination
of the Baikal rift system. The spatiotemporal evolution of the major parameters of the underground aqueous ecosystem of this
spring is controlled mainly by geological and geodynamic factors, whereas the parameters of the surface system are determined
mostly by bacterial factors. Variations in these factors are correlated with changes in the composition, structure, and spatial
distribution of the bacterial communities. 相似文献
3.
The main object for this study, Sibirskie Uvaly, is a small mountain ridge along the right bank of the Ob, the origin of which has been hotly debated. We have ascertained that the influence of ancient glaciation is manifested only indirectly in the structure of Sibirskie Uvaly. Their origin is associated to a greater extent with the self-development of the river network, tectonics and the advance of sea. 相似文献
4.
A. S. Pleshanov V. M. Plyusnin S. I. Shamanova A. A. Sorokovoi S. G. Kazanovskii A. V. Verkhozina I. A. Antonov I. N. Shekhovtsova A. S. Kaverzina O. A. Chernysheva 《Geography and Natural Resources》2012,33(1):33-36
Using an ingenious cartographic method, for the Baikal natural territory we have developed a benchmark network that includes
18 tracts (0.47% of the territory under consideration). Special-purpose ground-based surveys of the selected tracts showed
that such a network fully reflects the landscape diversity on the level of geoms, the phytocenotic diversity, and the species
diversity of the regional biota. 相似文献
5.
A. D. Kitov E. N. Ivanov V. M. Plyusnin A. S. Gladkov O. V. Lunina E. V. Serebryakov A. M. Afon’kin 《Geography and Natural Resources》2018,39(1):55-62
Presented are the results obtained from radar profiling of the Peretolchin glacier in the Munku-Sardyk mountain range in the south of Siberia (June 2014 and May 2016) using georadar OKO-2 with the ABDL Triton antenna unit operating at the radiation frequency of 50 and 100 MHz. The ice thickness was determined from the profiles and the ice volumes from the cross-sectional areas and distances between profiles. The ice volume was calculated for the body of the Peretolchin glacier to be 0.007 ± 0.0019 km3. An analytical method was also used to determine the ice volume according to the type and area of glacier. It is established that the correlation between the glacier volume and area is expressed by a power function V = kS p . The mean ice volume, calculated with due regard for different coefficients, was 0.0061 km3. The GlabTop model that assumes the cross-sectional form of the glacier was used to infer the ice volume: the mean volume for two cross-sections (parabolic and elliptic) was 0.0073 km3. It is found that over 110 years since the start of the investigation into the morphology of the Peretolchin glacier, it has increased twice in its length and in area, its volume has decreased by a factor of 3.7, and the lower boundary of the open part of the glacier has risen 184 meters during that period. 相似文献
6.
Results from investigating the geosystems of Cisbaikalia in its western and eastern parts (Primorskii Range and Barguzin Range, respectively) are presented. For studying three macroslopes of these mountain ranges (having an easterly aspect for the Primorskii Range and a westerly and south-easterly aspect for the Barguzin Range), the regional background and the main factors of the landscape differentiation of the study areas were analyzed. Structural features of topological geosystems are revealed, and large-scale maps of key areas are compiled (at a scale of 1:50 000). Maps of the landscape-typological structure were created on the basis of the structural-dynamic and facies analysis of landscapes. It is established that the main factors influencing the landscape diversity are the aspect and steepness of the slopes, the composition and structure of rocks, the absolute height, the amount of atmospheric precipitation, and anthropogenic impacts. It is determined that the influence of the lithomorphic factor is widespread throughout the study areas, the hydromorphic factor is also important, the cryomorphic factor occurs additionally in the goletz zone, and the xeromorphic factor is only observed on the Baikal Range and on the coastal plain in some areas of Priolkhonie. The dynamic aspect of the landscape structure and the relationships between geosystems are displayed in map legends. 相似文献
7.
V. M. Plyusnin E. N. Ivanov A. D. Kitov V. S. Sheinkman 《Geography and Natural Resources》2017,38(3):267-274
An analysis is made of the glaciation status of the mountains in the south of East Siberia to reveal a number of characteristics of changes in glacier systems. It is determined that the mountain systems are all experiencing a deglaciation caused by global climatic changes, while the rates of degradation have increased considerably since the late 1980s. It is established that over the last several decades the rate of thawing of glaciers has decelerated according to data for the key sites in the Kodar, Baikal’skii, Barguzin. Munku-Sardyk and Eastern-Sayan mountain ranges, which is associated with a decrease in mean annual air temperatures in 2009, 2010, 2012 and 2013 after the maximum values in 1990, 1994, 1995, 1997, 2002 and 2007. The changes recorded in the amount of solid atmospheric precipitation do not produce any definite trends in all of the mountain systems analyzed. It is determined that, given a relatively small snow accumulation, the glaciers are fed by snow avalanches and persist due to accumulation of large reserves of cold throughout long and cold winters which impede an intense ablation and promote the sustenance of glaciation. It is pointed out that the thawing of glaciers (especially cirque glaciers) involves a decrease in their thickness, whereas their area changes little. 相似文献
8.
A. G. Osipov V. V. Dmitriev S. A. Maslennikov L. A. Plastinin V. M. Plyusnin 《Geography and Natural Resources》2017,38(1):12-19
This paper presents the scientific-methodological approaches to cartographic GIS-based modeling of pipelines with geoecological restrictions which essentially imply a spatial multiparametric analysis of the natural potential of the study territory in order to explore its possibilities of consistently performing the socioeconomic functions as pre-assigned without disturbing the life-support (environment and resource reproduction) functions. The suggested technique is illustrated by the example of selecting the route for the laying of the pipeline system on the model territory in the arctic zone of Siberia. Critical principles are applied to the technique of cartographic modeling of the pipeline route, i.e. the principles of systemacy, ecological security, priority of estimated indicators, unity of assessment and economic expediency. The following investigation methods were used in implementing the technique: ranking of the properties of natural landscapes according to their influence on the suitability of the territory, qualimetric assessments for the suitability classes of lands of natural systems, and graph theory for determining the optimal pipeline route on the basis of Dijkstra’s algorithm. The table of unnormalized and normalized weight factors is compiled, which are taken in consideration for assessing the suitability of natural landscape components and their characteristic properties. Archival and published reference data are used to calculate the reference values of the indicators used in an integral assessment of the suitability of the territory for the laying of the pipeline route. 相似文献
9.
Averaged many-year measurement data on the concentrations of mineral forms of biogenic elements are analyzed, and their total concentrations in the rivers of Selenga, Chikoi, Khilok, Uda, Dzhida, and Temnik are evaluated. The monthly variations of the concentrations of major biogenic substances are characterized, and their ratios within a year are determined. Characteristics of river water runoff and biogenic substance concentrations are used to evaluate their within-year discharge by rivers. Characteristic variations in the ratios between the total and mineral forms of biogenic elements discharged by rivers have been revealed. It is established that the share of mineral components in the total input into the Selenga delta Ntot and Ptot are 82 and 22%, respectively. 相似文献
10.
Basic exogenic dynamic processes are analysed and discussed. Such processes are actively developed and intensively utilized in mountainous regions of the Baikal-Amur Mainline. Investigation of these regions, which call for reliance on aerospace methods is of considerable economic significance. Translated from: Kosmicheskiye Issledovaniya Prirodnykh Kompleksov Sibiri i Dal'nego Vostoka, Novosibirik, 1983, pp. 57-63. 相似文献