A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structural analysis of thermokarst lake ice in Beiluhe Basin, Qinghai–Tibet Plateau
Abstract The high altitude and cold climate of the Qinghai–Tibet Plateau (QTP) means that rivers and lakes are covered by ice for 6–7months of the year. The ice cover is a major influence on environmental and ecological conditions, since it alters the heat and energy exchange with local atmosphere, as well as determines the design and construction of civil buildings. However, research on these ice covers has not been conducted previously. For the first time, the present work focuses on in-situ observations of ice growth and decay, and the inner structural analysis of ice samples from a thermokarst lake, Beiluhe basin, in the central plateau. Ice was sampled on two occasions during fast growth and slow growth periods. Ice crystals, densities and gas bubbles were investigated and classified into ice types. Vertical profiles of the ice crystal type, crystal size, fabrics, gas bubble shape and size, gas content, as well as ice density were determined. The formation mechanism was discussed based on QTP meteorology and stratigraphy.
Highlights ► Thermokarst lake ice growth and decay on QTP was investigated unprecedentedly. ► Inner structure of ice samples were measured and analyzed. ► Only columnar crystal showed up. ► Two typical shapes of gas bubbles were detected with determination of their content and size. ► Meteorology and stratigraphy of QTP were evaluated to discuss the structural characteristics.
Structural analysis of thermokarst lake ice in Beiluhe Basin, Qinghai–Tibet Plateau
Abstract The high altitude and cold climate of the Qinghai–Tibet Plateau (QTP) means that rivers and lakes are covered by ice for 6–7months of the year. The ice cover is a major influence on environmental and ecological conditions, since it alters the heat and energy exchange with local atmosphere, as well as determines the design and construction of civil buildings. However, research on these ice covers has not been conducted previously. For the first time, the present work focuses on in-situ observations of ice growth and decay, and the inner structural analysis of ice samples from a thermokarst lake, Beiluhe basin, in the central plateau. Ice was sampled on two occasions during fast growth and slow growth periods. Ice crystals, densities and gas bubbles were investigated and classified into ice types. Vertical profiles of the ice crystal type, crystal size, fabrics, gas bubble shape and size, gas content, as well as ice density were determined. The formation mechanism was discussed based on QTP meteorology and stratigraphy.
Highlights ► Thermokarst lake ice growth and decay on QTP was investigated unprecedentedly. ► Inner structure of ice samples were measured and analyzed. ► Only columnar crystal showed up. ► Two typical shapes of gas bubbles were detected with determination of their content and size. ► Meteorology and stratigraphy of QTP were evaluated to discuss the structural characteristics.
Structural analysis of thermokarst lake ice in Beiluhe Basin, Qinghai–Tibet Plateau
Huang, Wenfeng (author) / Li, Zhijun (author) / Han, Hongwei (author) / Niu, Fujun (author) / Lin, Zhanju (author) / Leppäranta, Matti (author)
Cold Regions, Science and Technology ; 72 ; 33-42
2011-11-14
10 pages
Article (Journal)
Electronic Resource
English
Structural analysis of thermokarst lake ice in Beiluhe Basin, Qinghai–Tibet Plateau
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