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Spatial and temporal variability of ...

Streletskiy, Dmitry A.

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Spatial and temporal variability of the active-layer thickness at regional and global scales.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Spatial and temporal variability of the active-layer thickness at regional and global scales./
作者:	Streletskiy, Dmitry A.
面頁冊數:	261 p.
附註:	Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6649.
Contained By:	Dissertation Abstracts International71-11B.
標題:	Physical Geography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3423386
ISBN:	9781124241401

Spatial and temporal variability of the active-layer thickness at regional and global scales.
Streletskiy, Dmitry A.

Spatial and temporal variability of the active-layer thickness at regional and global scales. - 261 p.

Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6649.

Thesis (Ph.D.)--University of Delaware, 2010.

This dissertation is focused on problems involving the spatial and temporal variability of climatic and permafrost parameters over a range of geographical scales, and the landscape-specific effects of this variability in a contemporary environmental setting. This work includes extensive spatially oriented field investigations conducted in northern Alaska and Siberia, analysis of spatial and temporal regularities in climatic and permafrost variables, and development of analytical techniques for their regional characterization.

ISBN: 9781124241401Subjects--Topical Terms:

893400
Physical Geography.

Spatial and temporal variability of the active-layer thickness at regional and global scales.
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245 1 0 $a Spatial and temporal variability of the active-layer thickness at regional and global scales.
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500 $a Source: Dissertation Abstracts International, Volume: 71-11, Section: B, page: 6649.
500 $a Advisers: Frederick E. Nelson; Nikolay I. Shiklomanov.
502 $a Thesis (Ph.D.)--University of Delaware, 2010.
520 $a This dissertation is focused on problems involving the spatial and temporal variability of climatic and permafrost parameters over a range of geographical scales, and the landscape-specific effects of this variability in a contemporary environmental setting. This work includes extensive spatially oriented field investigations conducted in northern Alaska and Siberia, analysis of spatial and temporal regularities in climatic and permafrost variables, and development of analytical techniques for their regional characterization.
520 $a Complex analysis of data from observational sites provides both spatial and temporal insight to the evaluation of the active-layer variability and is used to establish relationships between climatic and environmental factors at the site-specific scale by examining spatial and temporal regularities in the ground thermal regime under representative generalized landcover types. Landscapes with similar environmental characteristics show similar active-layer variability. Regional landcover classifications, together with climatic datasets, are used as input to the model for extrapolating local findings over larger areas and to evaluate spatial and temporal variability at regional scales. Prior to regional assessments four commonly used climatic datasets used in modeling applications are compared to evaluate datasetspecific biases.
520 $a Climate warming has occurred in most parts of the Arctic over the last several decades, resulting in an increase of permafrost temperature and thickening of the active layer. This has resulted in decreases of ground bearing capacity, which may not have been anticipated at the time of construction. A model was developed to estimate changes in bearing capacity under changing climatic conditions. Changes in bearing capacity for the last forty years were computed for large population and industrial centers representing different geographical conditions in the Russian Arctic. A GIS-based landscape approach was used to apply the model at a regional scale, depicting changes in permafrost temperature, active-layer thickness, and bearing capacity in North West Siberia and the North Slope of Alaska.
520 $a The results of this research can be applied to improve current near-surface permafrost parameterizations used in GCMs and by the engineering community to account for climate change prior to construction of foundations on permafrost.
590 $a School code: 0060.
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790 1 0 $a Nelson, Frederick E., $e advisor
790 1 0 $a Shiklomanov, Nikolay I., $e advisor
790 1 0 $a Willmott, Cort J. $e committee member
790 1 0 $a Walker, Donald A. $e committee member
790 1 0 $a Drozdov, Dmitry S. $e committee member
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