Tian Shan
The Tian Shan,[note 1] also known as the Tengri Tagh[1] or Tengir-Too,[2] meaning the "Mountains of God/Heaven", is a large system of mountain ranges in Central Asia. The highest peak is Jengish Chokusu at 7,439 metres (24,406 ft) high. Its lowest point is the Turpan Depression, which is 154 m (505 ft) below sea level.[3]
"Tianshan" redirects here. For other uses, see Tianshan (disambiguation).Tian Shan
7,439 m (24,406 ft)
Mesozoic and Cenozoic
Xinjiang Tianshan
Natural
vii, ix
Western Tien-Shan
Natural
x
One of the earliest historical references to these mountains may be related to the Xiongnu word Qilian (traditional Chinese: 祁連; simplified Chinese: 祁连; pinyin: Qílián), which, according to Tang commentator Yan Shigu, is the Xiongnu word for "sky" or "heaven".[4] Sima Qian, in the Records of the Grand Historian, mentioned Qilian in relation to the homeland of the Yuezhi, and the term is believed to refer to the Tian Shan rather than the range 1,500 kilometres (930 mi) further east now known as the Qilian Mountains.[5][6] The name of the Tannu-Ola mountains in Tuva has the same meaning. The Chinese name Tian Shan is most likely a direct translation of the traditional Kyrgyz name for the mountains, Teñir Too.[1]
The Tian Shan is sacred in Tengrism. Its second-highest peak is known as Khan Tengri, which may be translated as "Lord of the Spirits".[7] At the 2013 Conference on World Heritage, the eastern portion of Tian Shan in western China's Xinjiang Region was listed as a World Heritage Site.[8] The western portion in Kazakhstan, Kyrgyzstan, and Uzbekistan was then listed in 2016.[9]
Ice Age[edit]
The Tian Shan plateau, stretching 100 to 120 km wide, is located on the northern margin of the Tarim basin between the Kokshaal-Tau mountain chain to the south and the Terskey Alatau mountain chain to the north. The Kokshaal-Tau extends for 570 km from Pik Dankowa in the west to Pik Pobeda in the east-northeast. This mountain chain, along with the parallel Terskey Alatau and the Tian Shan plateau in between, were covered by connected ice-stream-networks and a plateau glacier during glacial times. The only remaining interglacial remnant of this glaciation is the 61 km long South Inylschek glacier. The outlet glacier tongues of the plateau glacier flowed northward down to Lake Issyk Kul, calving in this 160 km long lake.
Similarly, strong glaciation was present in the high mountain area of the Kungey Alatau, which stretches for 230 km north of Issyk Kul and connects to the mountain foreland near Alma Ata. The glacial glaciers from the Kungey Alatau also calved into Lake Issyk Kul, with the Ak-Sai valley glacier developing a mountain foreland glacier.[12][13][14] The Chon-Kemin valley was glaciated up to its inflow into the Chu valley.[12][15][14]
Altogether, the glacial Tian Shan glaciation occupied an area of approximately 118,000 square kilometers. The glacier snowline was about 1200m lower during the last ice age than it is today. This would result in a depression of the average annual temperature of 7.2 to 8.4 °C for the Last Glacial Maximum compared with today, assuming a comparable precipitation ratio.[12]