Geocryology is the science studying the effects of ground temperatures below 0˚C on the surface layers of the crust of the Earth. Areas with perennially frozen ground occupy over 20% of the land areas on Earth. The last book on this subject that dealt with processes and the landforms was published in 1979, and is therefore greatly out of date. The book is divided into three parts, viz., the introduction and characteristics of permafrost, the unique landforms found in these regions, and the limitations and problems affecting development in these areas. This book incorporates considerable Russian and Chinese research and expertise, providing a uniquely comprehensive, global overview.
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