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he 8th International Conference on Permafrost provides a focus for an increasingly wide range of scientific and technical research on frozen ground. Permafrost and related phenomena occur in many geographical contexts, including high-latitude arctic lowlands, Antarctica, within sub sea sediments and within high mountain chains. During the Quaternary, permafrost was even more widespread than today. Knowledge of frozen ground phenom-ena is now being used in the interpretation of extra-terrestrial planetary conditions. The Proceedings of the 8th International Conference reflect this diversity, and contain 230 reviewed contributions from 12 countries. Together with a special volume of extended abstracts on current research and newly available information, they document the progress made since the last international conference, held in Yellowknife, Canada, in 1998. The conference venue, Zurich, is a lively and colourful city within a small, densely populated, mid-latitude country in the heart of Europe. Permafrost was widespread here during Quaternary cold stages and still occurs in the surrounding high mountains. This is reflected in the logo of the conference featuring the silhouette of the Matterhorn, a famous frozen alpine summit, illuminated by the stars of the European Union. Much recent research and engineering in mid-latitude mountains has arisen from concern over permafrost on steep slopes. The cover of the proceedings and other conference publications uses an image of a steep icy slope (from Lyskamm, a mountain in the Monte Rosa group of the Swiss Alps). This forms an invitation to take a closer look at a new dimension in permafrost research, and to consider the scientific, technical and economic challenges of frozen ground above the heads rather than below the feet of the inhabitants of many high mountain regions. Field excur-sions to the Central and Eastern Alps provide the opportunity to visit such sites of intensive research and practi-cal interest. In addition, all conference participants are invited to study ‘Zurich by Ice’ in a half-day mid-week excursion to the surroundings of the city, with spectacular views to the more distant mountain permafrost domain, and to the lake with its moraines, an important heritage of the Ice Age. The organization of the conference has been a collaborative effort by Switzerland and a number of European countries. Close contacts were also maintained with the Advisory Board of the International Permafrost Association. We offer our sincere thanks to all who helped make the conference a success. We are especially grateful to Marcia Phillips, Sarah Springman and Lukas Arenson, who edited the proceedings volumes and to the review editors and reviewers who devoted time and expertise to the reviewing process. The International Permafrost Association is a truly international organization involving many countries, and permafrost research is marked by collaboration across national borders and between scientific/technical disci-plines. The main programme of the conference includes public lectures, plenary talks, oral and poster sessions, together with Council meetings of the Association, various working parties, exhibits and social events, and col-lectively they clearly express fascination with the subject, its relevance to society, and the cooperative attitude found in permafrost science and engineering. We welcome all participants from across the globe, and hope that these proceedings will provide an inspiration to future generations of permafrost scientists and engineers.