title: The yurt: a mobile home of nomadic populations dwelling in the Mongolian steppe is still used both as a sun clock and a calendar.
abstract: The yurt is the traditional home of the nomadic Turkmen, the Kyrgyz, the Kazakhs, the Uzbeks, the Kalmyks, the Buryats and the Mongolians. As the impact of the western modern world, in terms of technological and behavioural changes, is slower than anywhere else, the use of the yurt is widespread in the Mongolian steppes, where nomadic life has been maintaining its traditional behaviour for at least 800 years. The Mongolian yurt entrance faces south and combines spatial and functional properties. An open circular hole named the "toon" can be found at the centre of the roof. On sunny days, a ray of sunshine revolves around its inner wall. Depending on the season, the light first appears between 5:40 am and 7:40 am and moves around the different inner walls (khana). The sundial enables the nomads to schedule their daily activities such as the herd milking and its processing, the drying of dung for fuel, the prayers and performing fighting games. The angle of the sun's light coming through the toon and lighting a space on the floor by the yurt entrance can vary according to the time of the year. Such clues are used to guess what time it is and which month it is, and thus help the Mongolians decide whether or not to start travelling from summer to winter pastures. The Mongolians pay special attention to the transhumances, seasonal movements based on a specific time, in order to prevent harming the livestock during the harsh Mongolian winter, and to choose the right time to move the yurt. They also pay attention not to offend the spirits of the wind, the earth and the sky. Regarded as the warrant of their ancestors' cultural traditions, nomadic people remain faithful to their heritage and respect their surrounding environment. Thus, the yurt has remained their reference to time in the heart of the Mongolian steppes.
authors.affiliation: UMR 1075 COMETE -- INSERM & Université de Caen Basse-Normandie Mobilités: Attention, Orientation & Chronobiologie UFR de Médecine , avenue de la Côte de Nacre Campus 5 -- 14032 Caen Cedex , France and.
authors.forename: Benoit
authors.initials: B
authors.lastname: Mauvieux
authors.forename: Alain
authors.initials: A
authors.lastname: Reinberg
authors.forename: Yvan
authors.initials: Y
authors.lastname: Touitou
mesh_terms: D000203:Activities of Daily Living; D044466:Asian People; D003466:Cultural Characteristics; D006798:Housing; D006801:Humans; D008986:Mongolia; D012621:Seasons; D013472:Sunlight; D013997:Time Factors; D014171:Transients and Migrants; D014195:Travel