scholarly journals Insulation systems for structures on pile supports

2021 ◽  
Vol 258 ◽  
pp. 09088
Author(s):  
Aleksey Zhukov ◽  
Igor Bessonov ◽  
Andrey Medvedev ◽  
Ekaterina Zinovieva ◽  
Elizaveta Mednikova
Keyword(s):  
Arctic Region ◽  
Mineral Wool ◽  
Climatic Conditions ◽  
Pile Foundations ◽  
The Arctic ◽  
Frozen Ground ◽  
Climatic Zones ◽  
Floor Structure ◽  
Insulation Systems ◽  
Problem Soils

Construction on problem soils or in permafrost conditions involves using of pile foundations with a ventilated space under the floor structure. In this case, additional thermal insulation is required under the first-floor structure (above the ventilated space). This problem is com-pounded by construction in cold regions. The goal of research was to develop insulation systems for buildings on pile foundations for different climatic zones, including conditions of the arctic region and other regions with a predominance of ever-frozen ground. With the help of the THERM computer program, the conditions of bidimensional heat interchange in the enclosing structures of a building with pile foundation were simulated. The construction of such buildings is practiced on problem soils. The resulting models were analyzed in terms of the thermophysical characteristics of the structures. As a result, the optimal version of the insulation system was chosen, effective both in the climatic conditions of the midland and in the especially cold conditions of Yakutia and Trans-Polar region (The Subarctic). This system included insulation with mineral wool slabs along the facade walls, with extruded polystyrene (XPS) foams along the basement part and the floor structure, and with roll polyethylene (PE) foams (with the formation of a seamless insulation shell) along the ventilated space under the floor structure and above, on top of insulation boards.

scholarly journals Insulation systems for structures on pile supports

2021 ◽  
Vol 263 ◽  
pp. 01010
Author(s):  
Vyacheslav Semenov ◽  
Igor Bessonov ◽  
Ekaterina Zinovieva ◽  
Elizaveta Mednikova
Keyword(s):  
Arctic Region ◽  
Mineral Wool ◽  
Climatic Conditions ◽  
Pile Foundations ◽  
The Arctic ◽  
Frozen Ground ◽  
Climatic Zones ◽  
Floor Structure ◽  
Insulation Systems ◽  
The Arctic Region

Construction on problem soils or in permafrost conditions involves using of pile foundations with a ventilated space under the floor structure. In this case, additional thermal insulation is required under the first-floor structure (above the ventilated space). The aim of research was to develop insulation systems for buildings on pile foundations for different climatic zones, including conditions of the arctic region and other regions with a predominance of ever-frozen ground. With the help of the THERM computer program, the conditions of bidimensional heat interchange in the enclosing structures of a building with pile foundation were simulated. The resulting models were analysed in terms of the thermophysical characteristics of the structures. As a result, the optimal version of the insulation system was chosen, effective both in the climatic conditions of the midland and in the especially cold conditions of Yakutia and Trans-Polar region (The Subarctic). This system included insulation with mineral wool slabs along the facade walls, with extruded foamed polystyrene along the basement part and the floor structure, and with rolled foamed polyethylene (with the formation of a seamless insulation shell) along the ventilated space under the floor structure and above, on top of insulation boards.

scholarly journals Paleocene-Eocene volcanic segmentation of the Norwegian-Greenland seaway reorganized high-latitude ocean circulation

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Jussi Hovikoski ◽  
Michael B. W. Fyhn ◽  
Henrik Nøhr-Hansen ◽  
John R. Hopper ◽  
Steven Andrews ◽  
...  
Keyword(s):  
Ocean Circulation ◽  
High Latitude ◽  
Seismic Reflection ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Early Eocene ◽  
Subaerial Exposure ◽  
Thermal Maximum ◽  
Volcanic Facies

AbstractThe paleoenvironmental and paleogeographic development of the Norwegian–Greenland seaway remains poorly understood, despite its importance for the oceanographic and climatic conditions of the Paleocene–Eocene greenhouse world. Here we present analyses of the sedimentological and paleontological characteristics of Paleocene–Eocene deposits (between 63 and 47 million years old) in northeast Greenland, and investigate key unconformities and volcanic facies observed through seismic reflection imaging in offshore basins. We identify Paleocene–Eocene uplift that culminated in widespread regression, volcanism, and subaerial exposure during the Ypresian. We reconstruct the paleogeography of the northeast Atlantic–Arctic region and propose that this uplift led to fragmentation of the Norwegian–Greenland seaway during this period. We suggest that the seaway became severely restricted between about 56 and 53 million years ago, effectively isolating the Arctic from the Atlantic ocean during the Paleocene–Eocene thermal maximum and the early Eocene.

scholarly journals High-time resolved radon-progeny measurements in the Arctic region (Svalbard Islands, Norway): results and potentialities

2017 ◽  
Author(s):  
Roberto Salzano ◽  
Antonello Pasini ◽  
Antonietta Ianniello ◽  
Mauro Mazzola ◽  
Rita Traversi ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Atmospheric Stability ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Radon Emanation ◽  
Radon Progeny ◽  
Time Resolved ◽  
Scientific Challenge ◽  
The Arctic Region

Abstract. The estimation of radon progeny in the Arctic region represents a scientific challenge due to the required low limit of detection in consideration of the limited radon emanation associated with permafrost dynamics. This preliminary study highlighted, for the first time, the possibility to monitor radon progeny in the Arctic region with a higher time resolution. The composition of the radon progeny offered the opportunity to identify air masses dominated by long-range transport, in presence or not of near-constant radon progeny instead of long and short lived progenies. Furthermore, the different ratio between radon and thoron progenies evidenced the contributions of local emissions and atmospheric stability. Two different emanation periods were defined in accordance to the permafrost dynamics at the ground and several accumulation windows were recognized coherently to the meteo-climatic conditions occurring at the study site.

scholarly journals CEREBRAL ENERGY METABOLISM IN YOUNG PEOPLE DURING ADAPTATION TO THE CONDITIONS OF THE ARCTIC REGION

2019 ◽  
Vol 19 (2) ◽  
pp. 7-13
Author(s):  
N Anikina ◽  
A Gribanov ◽  
I Kozhevnikova ◽  
M Pankov ◽  
S Bagretsov
Keyword(s):  
Energy Consumption ◽  
Energy Metabolism ◽  
Young People ◽  
Left Hemisphere ◽  
Arctic Region ◽  
Climatic Conditions ◽  
Regulatory Mechanisms ◽  
The Arctic ◽  
Cerebral Energy Metabolism ◽  
The Arctic Region

Aim. The article deals with determining the features of cerebral energy metabolism in young people at different stages of adaptation in the Arctic region. Materials and methods. The level of permanent brain direct current potentials (DCP) was measured in 146 young people: 93 born and permanently living in the Arctic region and 53 migrants living in new climatic conditions for the first months. The study was conducted by using a “Neuro-KM” 12-channel hardware-software complex for the topographic mapping of brain electrical activity. DCP were recorded in the unipolar leads according to the 10-20 international system. Statistical processing of the data obtained was carried out with the software package SPSS-20 for Windows. Results. In young people permanently living in the Arctic region, we revealed functional asymmetry of the brain with right-hemisphere dominance in almost all leads. In migrants living in the climatic conditions of the Arctic region for the first months, we established high values of energy consumption and partial asymmetry of cerebral energy metabolism. Conclusion. Body functioning in the usual habitat is characterized by a stereotypical set of regulatory mechanisms. During adaptation, new ways of responding to changes in the environment are formed. The dominance of the right or left hemisphere occurs depending on the type of tasks. The analysis of interhemispheric asymmetry of energy consumption performed by using the method of brain mapping allows assessing the degree of dominance. The dominance of energy consumption in the left hemisphere may indicate a possible failure of adaptation mechanisms. Positive interhemispheric gradients indicate the correct performance of CNS regulatory mechanisms during adaptation to new environmental conditions

scholarly journals FORECAST OF PROFESSIONAL LONGEVITY OF EMERCOM OF RUSSIA EMPLOYEES IN THE CONDITIONS OF THE ARCTIC REGION

2019 ◽  
pp. 85-93
Author(s):  
E. V. Goryacheva
Keyword(s):  
Arctic Region ◽  
Climatic Conditions ◽  
Psychological Characteristics ◽  
The Arctic ◽  
Professional Experience ◽  
Psychological Techniques ◽  
Emotional Sensitivity ◽  
Professional Longevity ◽  
Group 1 ◽  
The Arctic Region

Relevance. The professional activities of EMERCOM of Russia employees in the Arctic region are curried out in harsh climatic conditions, are associated with high social and professional responsibility, and potential risks to life and health.Intention – to predict the model of professional longevity of EMERCOM of Russia employees in the Arctic region. Methods. The study involved 176 EMERCOM of Russia employees divided into 3 groups depending on the length of professional experience in the Arctic region: group 1, 2 and 3 with length of service up to 5 years, from 5 to 10 years, and over 10 years, respectively. To determine the individual psychological characteristics, standardized psychological techniques were used.Results and Discussion. Based on questionnaires, the biomedical component of the professional longevity of EMERCOM of Russia employees was established. In Group 1, 11 % of employees had medium level of the biomedical component, 62% had a level above medium, and 27 % had a high level. With an increase in the professional experience in the Arctic region, the number of people with high biomedical component decreases – for example, in Group 3, there were no employees with high levels. Correlation analysis showed that the professional longevity of EMERCOM of Russia employees in the Arctic region was facilitated by such individual psychological characteristics as time orientation, support, value orientation, self esteem, self acceptance, acceptance of aggression, cognitive needs, personality, existential fulfillment, emotional stability, independence, responsibility, whereas pessimism, impulsivity, trait and state anxiety, depression, tension, depersonalization decreased the professional longevity. Using the stepwise regression, with the length of professional experience as a result, a model for forecasting the professional longevity of EMERCOM of Russia employees in the Arctic region was created; forecast probability is 84 % (p < 0.001). The level of the biomedical component of professional longevity and individual psychological characteristics (emotional sensitivity, existential performance, sociability, flexibility of behavior, individualism, courage) were highly significant.Conclusion. Taking into account the level of development of the biomedical component and such individual psychological characteristics as emotional sensitivity, existential fulfillment, sociability, flexibility of behavior, individualism, courage, will contribute to the professional longevity of EMERCOM of Russia employees in the Arctic region. 

scholarly journals Features of Forming the Composition of the Atmosphere in the City of Murmansk

2020 ◽  
Author(s):  
Anastasia Legostaeva ◽  
Anastasia Shironina ◽  
Anna Malaeva
Keyword(s):  
Urban Environment ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Industrial Facilities ◽  
Site Development ◽  
The Russian Federation ◽  
Combined Impact ◽  
The City ◽  
The Arctic Region

The article is devoted to the issues of planning and development of urban environment in the Arctic region of the Russian Federation, the city of Murmansk located beyond the Arctic Circle is investigated as an example. The article provides a description of the natural and climatic conditions, characteristic of the latitude of the city, it also gives a detailed analysis of the site development and the microclimate it formed, impacting greatly on the distribution of pollutants in the city’s outside air and, consequently, on the comfortable conditions for the northerners living. The conclusions are based on the surveys of more than 200 industrial facilities located on the territory of Murmansk and the city’s transport as well. The analysis of their combined impact on the outside atmosphere of the city was conducted by the specialists of JSC Research Institute ”Atmosphere” applying the system of summary calculation.

scholarly journals Amplified bioproductivity during Transition IV (332 000–342 000 yr ago): evidence from the geochemical record of Lake El'gygytgyn

2012 ◽  
Vol 8 (6) ◽  
pp. 5341-5358 ◽  
Author(s):  
L. Cunningham ◽  
H. Vogel ◽  
V. Wennrich ◽  
O. Juschus ◽  
N. Nowaczyk ◽  
...  
Keyword(s):  
Biogenic Silica ◽  
Ice Cores ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Significant Shift ◽  
Geochemical Parameters ◽  
Lake El’Gygytgyn ◽  
Arctic Russia

Abstract. To date, terrestrial archives of long-term climatic change within the arctic region have widely been restricted to ice cores from Greenland and, more recently, sediments from Lake El'gygytgyn in Northeast Arctic Russia. Sediments from this lake contain a paleoclimate record of glacial-interglacial cycles during the last three million years. Low resolution studies at this lake have suggested that changes observed during Transition IV are of greater amplitude than any observed since. In this study, geochemical parameters are used to infer past climatic conditions thus providing the first high resolution analyses of Transition IV from a terrestrial arctic setting. These results demonstrate that a significant shift in climate was subsequently followed by a rapid increase in biogenic silica production. Following this sharp increase, bioproductivity remained high, but variable, for over a thousand years. This study reveals differences in the timing and magnitude of change within the ratio of silica to titanium (Si/Ti) and biogenic silica (BSi) records that would not be apparent in lower resolution studies. This has significant implications for the increasingly common use of Si/Ti data as an alternative to traditional BSi measurements.

scholarly journals Rotation system as the basic source of workforce for the development of oil and gas resources of the arctic polar regions

2021 ◽  
pp. 191-201
Author(s):  
LOGINOV Vladimir Grigor’evich ◽  
Keyword(s):  
Industrial Development ◽  
Oil And Gas ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Polar Regions ◽  
Rotation System ◽  
Oil And Gas Resources ◽  
Basic Source ◽  
Labor Resources

The purpose of the study is to analyze the use of the rotation system in the development of oil and gas resources in the Arctic region using the example of its polar municipal regions. Relevance. The depletion of the main hydrocarbon reserves in the previously developed areas of the Yamalo-Nenets Autonomous Okrug led to a shift in industrial development to new sparsely populated areas located beyond the Arctic Circle characterized by extreme natural conditions and with significant potential of natural resources that are attractive to investors. The absence of local labor resources in the regions of development and the low qualification level of local labor resources demanded that they be attracted from other regions using a rotation system. The research methodology consists in the generalization and analysis of information regarding the application of the rotation system in the studied areas. The main methods were statistical, retrospective analysis, comparison, groupings, averaging, and analogy. The information base of this study is data from regional and municipal statistics. Results. In the course of the study, the expediency of using a rotation system as the main method was confirmed, which has no alternative, the method of attracting labor force in the development of oil and gas resources in extreme polar regions. The need for shift personnel for the basic and infrastructure industries at various stages of the development of mineral deposits from the initial (pioneer) stage to their permanent operation has been identified. The characteristic of the natural-resource and socio-economic potential of the attractive Yamal region in terms of investment is given. The special place and its role in the economy of the region are noted, medium-term development prospects are considered. Conclusions. The rotation system of attracting workers to the development of oil and gas resources is generally recognized and used both in domestic and foreign practice. The increase in the share of rotational personnel in the total number of employed in the polar regions is due to their low population density, the lack of local skilled labor and the extreme nature of the natural environment, which prevents the adaptation of the newcomer population to climatic conditions and the creation of a permanent contingent of labor resources.

scholarly journals Health Risks to the Russian Population from Temperature Extremes at the Beginning of the XXI Century

Atmosphere ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1331
Author(s):  
Elena A. Grigorieva ◽  
Boris A. Revich
Keyword(s):  
Human Health ◽  
Heat Waves ◽  
Climatic Conditions ◽  
The Arctic ◽  
Climatic Zones ◽  
Cold Waves ◽  
Large Cities ◽  
Climatic Hazards ◽  
Northern Cities ◽  
In The Beginning

Climate change and climate-sensitive disasters caused by climatic hazards have a significant and increasing direct and indirect impact on human health. Due to its vast area, complex geographical environment and various climatic conditions, Russia is one of the countries that suffers significantly from frequent climate hazards. This paper provides information about temperature extremities in Russia in the beginning of the 21st century, and their impact on human health. A literature search was conducted using the electronic databases Web of Science, Science Direct, Scopus, and e-Library, focusing on peer-reviewed journal articles published in English and in Russian from 2000 to 2021. The results are summarized in 16 studies, which are divided into location-based groups, including Moscow, Saint Petersburg and other large cities located in various climatic zones: in the Arctic, in Siberia and in the southern regions, in ultra-continental and monsoon climate. Heat waves in cities with a temperate continental climate lead to a significant increase in all-cause mortality than cold waves, compared with cities in other climatic zones. At the same time, in northern cities, in contrast to the southern regions and central Siberia, the influence of cold waves is more pronounced on mortality than heat waves. To adequately protect the population from the effects of temperature waves and to carry out preventive measures, it is necessary to know specific threshold values of air temperature in each city.

scholarly journals Palynological insights into global change impacts on Arctic vegetation, fire, and pollution recorded in Central Greenland ice

The Holocene ◽  
2019 ◽  
Vol 29 (7) ◽  
pp. 1189-1197 ◽  
Author(s):  
Sandra O Brugger ◽  
Erika Gobet ◽  
Thomas Blunier ◽  
César Morales-Molino ◽  
André F Lotter ◽  
...  
Keyword(s):  
Global Change ◽  
20Th Century ◽  
Anthropogenic Activities ◽  
Ice Core ◽  
Ice Cores ◽  
Arctic Region ◽  
Climatic Conditions ◽  
The Arctic ◽  
Arctic Vegetation ◽  
Ranunculus Acris

Arctic environments may respond very sensitively to ongoing global change, as observed during the past decades for Arctic vegetation. Only little is known about the broad-scale impacts of early and mid 20th-century industrialization and climate change on remote Arctic environments. Palynological analyses of Greenland ice cores may provide invaluable insights into the long-term vegetation, fire, and pollution dynamics in the Arctic region. We present the first palynological record from a Central Greenland ice core (Summit Eurocore ’89, 72°35’N, 37°38’W; the location of Greenland Ice Core Project GRIP) that provides novel high-resolution microfossil data on Arctic environments spanning AD 1730–1989. Our data suggest an expansion of birch woodlands after AD 1850 that was abruptly interrupted at the onset of the 20th century despite favorable climatic conditions. We therefore attribute this Betula woodland decline during the 20th century to anthropogenic activities such as sheep herding and wood collection in the sub-Arctic. First signs of coal burning activities around AD 1900 coincide with the onset of Arctic coal mining. The use of coal and fire activity increased steadily until AD 1989 resulting in microscopic-size pollution of the ice sheet. We conclude that human impact during the 20th century strongly affected (sub)-Arctic environments. Moreover, ecosystems have changed through the spread of adventive plant species (e.g. Ranunculus acris, Rumex) and the destruction of sparse native woodlands. We show for the first time that optical palynology allows paleoecological reconstructions in extremely remote sites >500 km from potential sources, if adequate methods are used.

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