Investigating internal structure of permafrost using conventional methods and ground-penetrating radar at Honhor basin, Mongolia

A ground-penetrating radar (GPR) survey was conducted at the end of August 2009 in the suburb region of Ulaanbaatar, Honhor basin, Mongolia, in combination with conventional methods such as borehole drilling and measurement of ground temperatures. The interface of frozen and unfrozen sediment was distinctly resolved in the interpreted GPR images, verified by the borehole drilling records and 6-month measurement of ground temperatures. The location of the permafrost table was assessed to be at the depth of 2–4 m in the study region. A conspicuous icesaturated soil layer (massive ground ice) was detected in the interpretedGPRimageswithathicknessof2–5 m.TheGPR investigation results were consistent with the borehole drilling records and ground temperatures observation. The borehole logs and ground temperatures profile in the borehole indicates that permafrost at Honhor basin is characterized by high ground temperatureand highice content,which implies that ongoing climatic warming would have great influence on permafrost dynamics. The research results are of great importance to further assess permafrost dynamics to climatic change in the boundary of discontinuous and sporadic permafrost regions in Mongolia in the future.

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Source Environ Earth Science
Author Tonghua Wu, Qinxue Wang, Lin Zhao, Erji Du, Wu Wang, Ochirbat Batkhishig, Dorjgotov Battogtokh, Masataka Watanabe
Maintainer Т.Тэлмэн
Last Updated September 28, 2020, 06:45 (UTC)
Created September 28, 2020, 06:45 (UTC)