Freezing and Thawing of Soils Under the Influence of 300- and 90-Year Periods of Temperature Fluctuation PDF Download
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Author: V. E. Romanovsky
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
Mathematical modeling of perennial freeze and thaw is used in geocryology to solve both scientific and engineering problems. The surface temperature of a substrate is given as either a constant (stationary problem) or a function with a fixed period of fluctuation (periodic problem). In this paper a numerical permafrost model is developed for the southern Siberia region to study the influence of rhythmic climate change on the dynamics of permafrost. The mathematical model is represented as a two-dimensional heat conduction problem for a moist substrate with the latent heat effect for complex geological structures. This model takes into account a complex periodic temperature change at the soil surface and a stable heat flow at the lower and lateral boundaries for a steady domain. The enthalpy method to arrive at a numerical solution for this problem is used. It has been realized as a fully implicit local one-dimensional finite-difference scheme on an irregular grid. The calculations of the dynamics of temperature fields and permafrost boundaries are discussed to evaluate this scheme for the southern permafrost region of Eastern Siberia. The modeled results show that transects of temperature fields along some profiles (particularly at sites with complex geological structures) contain more information about permafrost dynamics than do ground temperature profiles from isolated boreholes.
Author: V. E. Romanovsky
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
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Book Description
Mathematical modeling of perennial freeze and thaw is used in geocryology to solve both scientific and engineering problems. The surface temperature of a substrate is given as either a constant (stationary problem) or a function with a fixed period of fluctuation (periodic problem). In this paper a numerical permafrost model is developed for the southern Siberia region to study the influence of rhythmic climate change on the dynamics of permafrost. The mathematical model is represented as a two-dimensional heat conduction problem for a moist substrate with the latent heat effect for complex geological structures. This model takes into account a complex periodic temperature change at the soil surface and a stable heat flow at the lower and lateral boundaries for a steady domain. The enthalpy method to arrive at a numerical solution for this problem is used. It has been realized as a fully implicit local one-dimensional finite-difference scheme on an irregular grid. The calculations of the dynamics of temperature fields and permafrost boundaries are discussed to evaluate this scheme for the southern permafrost region of Eastern Siberia. The modeled results show that transects of temperature fields along some profiles (particularly at sites with complex geological structures) contain more information about permafrost dynamics than do ground temperature profiles from isolated boreholes.
Author: Eduard A. Koster
Publisher:
ISBN:
Category : Climatic changes
Languages : en
Pages : 108
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Author: World Data Center A for Glaciology
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 414
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Author: Roger Graham Barry
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 404
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Author:
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 414
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Author: R. Paepe
Publisher: Springer Science & Business Media
ISBN: 9401006849
Category : Technology & Engineering
Languages : en
Pages : 662
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Book Description
Unlike connotations such as greenhouse effect. global change, sea level, desertification, etc. , permafrost is definitely lacking in the everyday speech of many non-specialists. The reason is that areas of permafrost are too remote, barren and isolated. Focus on permafrost today is brought when huge environmental disasters, mainly related to pollution by oil spills, occur. Even then it is offered as
Author: Mark Nuttall
Publisher: Routledge
ISBN: 1317549570
Category : Nature
Languages : en
Pages : 530
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Book Description
The Routledge Handbook of the Polar Regions is an authoritative guide to the Arctic and the Antarctic through an exploration of key areas of research in the physical and natural sciences and the social sciences and humanities. It presents 38 new and original contributions from leading figures and voices in polar research, policy and practice, as well as work from emerging scholars. This handbook aims to approach and understand the Polar Regions as places that are at the forefront of global conversations about some of the most pressing contemporary issues and research questions of our age. The volume provides a discussion of the similarities and differences between the two regions to help deepen understanding and knowledge. Major themes and issues are integrated in the comprehensive introduction chapter by the editors, who are top researchers in their respective fields. The contributions show how polar researchers engage with contemporary debates and use interdisciplinary and multidisciplinary approaches to address new developments as well as map out exciting trajectories for future work in the Arctic and the Antarctic. The handbook provides an easy access to key items of scholarly literature and material otherwise inaccessible or scattered throughout a variety of specialist journals and books. A unique one-stop research resource for researchers and policymakers with an interest in the Arctic and Antarctic, it is also a comprehensive reference work for graduate and advanced undergraduate students.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 754
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Author: Gunter Weller
Publisher: Geophysical Institute University of Alaska Fairbanks
ISBN:
Category : Nature
Languages : en
Pages : 428
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Book Description
The goal of this conference was to define and summarize the state of knowledge on the role of the Arctic and Antarctic regions in global change and to identify gaps in knowledge. Topics covered include: detection and monitoring of change : climate variability and climate forcing : ocean/sea ice/atmosphere interactions and processes : effects on biota and biological feedbacks : ice sheet, glacier and permafrost responses and feedbacks : paleoenvironmental studies : aerosols/trace gases.
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 360
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Book Description
