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Namtso or Lake Nam (officially: Nam Co; (モンゴル語:Tenger nuur); “Heavenly Lake”; in European literature: "Tengri-Nor", ) is a mountain lake on the border between Damxung County of Lhasa prefecture-level city and Baingoin County of Nagqu Prefecture in the Tibet Autonomous Region of China, approximately NNW of Lhasa. ==Geography and climate== Namtso was born in the Paleogene age, as a result of Himalayan tectonic plate movements. The lake lies at an elevation of , and has a surface area of . This salt lake is the largest lake in the Tibet Autonomous Region. However, it is not the largest lake on the Qinghai-Tibet Plateau. That title belongs to Qinghai Lake (more than twice the size of Namtso); which lies more than to the north-east in Qinghai. Namtso has five uninhabited islands of reasonable size, in addition to one or two rocky outcrops. The islands have been used for spiritual retreat by pilgrims who walk over the lake's frozen surface at the end of winter, carrying their food with them. They spend the summer there, unable to return to shore again until the water freezes the following winter. This practice is no longer permitted by Chinese authorities. The largest of the islands is in the northwest corner of the lake, and is about long and wide, rising to just over in the middle. At its closest point it is about from the shore. The most remote island is, at its closest, from the shore. At summer time birds like Ruddy shelduck and cormorants (Phalacrocorax sp.) migrate to the lake area, besides the fields of ''Astragalus'', ''Roegneria nutans'' and Marram grass. The weather at Namtso is subject to abrupt, sudden change and snowstorms are very common across the Nyainqêntanglha range. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Namtso」の詳細全文を読む スポンサード リンク
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