Turpan Depression

Coordinates: 42°47′N 89°20′E / 42.78°N 89.34°E / 42.78; 89.34
Source: Wikipedia, the free encyclopedia.

42°47′N 89°20′E / 42.78°N 89.34°E / 42.78; 89.34

Turpan Depression
Hanyu Pinyin
Tǔlǔfán Péndì
Uyghur nameUyghurتۇرپان ئويمانلىقى

The Turpan Depression or Turfan Depression, is a

Lake Ayding, −154 metres (−505 ft), the second or third lowest depression on Earth.[1]
By some measures, it is also the hottest and driest area in China during the summer.[2]

Geology and relief

The Turpan Basin is a fault-bounded trough located in the eastern part of the Tian Shan. It covers an area of 50,000 square kilometres (19,000 sq mi). The surrounding mountain ranges are: the central Tian Shan in the west, the Bogda Shan in the north-west, the Haerlike Shan in the north-west, and the Jueluotage Shan in the south. Beyond the surrounding mountain ranges lie the Junggar Basin in the north and the Tarim Basin in the south.

Some geographers also use the term Turpan-Hami Basin, which is understood as including the Turpan Depression along with the

Hami) and the Liaodong Uplift separating the two depressions. A source using this terminology gave the area of the Turpan Depression proper as 28,600 km2 (11,000 sq mi), that of the Hami Depression as 19,300 km2 (7,500 sq mi), and for the entire Turpan-Hami Basin, as 48,000 km2 (19,000 sq mi).[3]

Basin scene near Flaming Mountains

The Turpan Basin formed in a

Eurasian plates in the Cenozoic. In the latter deformation, a thrust fault belt running from east to west, the Flaming Mountains
, was formed in the center of the basin. The Flaming Mountains are 98 km (61 mi) long and 9 km (5.6 mi) wide; the highest peak reaches an elevation of 831.7 m (2,729 ft) above sea level. The Turfan volcano is located near Turpan.

Also in the center of the basin lies the Ayding Lake (Moonlight Lake) which has an elevation of 154.5 m (507 ft) below sea level, the sixth lowest exposed elevation on the Earth's land surface. It is the lowest surface point in China.

The Shihongtan uranium ore deposit is located at the southwestern margin of the Turpan Depression, some 35 km (22 mi) south-southwest from Turpan City.[3]

History of human settlement

Ruins of Gaochang

The ancient city of

Western Jin dynasty
until the middle of the Tang dynasty era.

The modern city of

karez for water.[4]

Climate

The Turpan Basin has a harsh, continental desert climate (Koppen BWk) in which the precipitation is far less than the potential evaporation. At Turpan City, July is the hottest month with a 24-hour average temperature of 32.2 °C (90.0 °F) and January the coldest with a 24-hour average temperature of −7.6 °C (18.3 °F). Monthly rainfall is highest in June, at 2.9 millimetres (0.11 in) and lowest in February and April, at 0.5 mm (0.020 in). The annual average precipitation is only 15.7 mm (0.62 in), falling on only 13 days per year. In contrast to this, the potential annual evaporation rate reaches 3,000 mm (120 in).[citation needed] Because of its climate, the area is sometimes counted as one of the Furnaces of China, although the locations included under this heading vary.

Climate data for Turpan (elevation 39 m (128 ft), 1991–2020 normals)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 8.5
(47.3)
19.5
(67.1)
31.7
(89.1)
40.5
(104.9)
43.6
(110.5)
47.6
(117.7)
49.1
(120.4)
47.8
(118.0)
43.4
(110.1)
34.3
(93.7)
23.0
(73.4)
9.6
(49.3)
49.1
(120.4)
Mean daily maximum °C (°F) −2.3
(27.9)
7.0
(44.6)
17.9
(64.2)
27.8
(82.0)
33.9
(93.0)
38.8
(101.8)
40.5
(104.9)
39.0
(102.2)
32.6
(90.7)
22.5
(72.5)
10.3
(50.5)
−0.4
(31.3)
22.3
(72.1)
Daily mean °C (°F) −6.7
(19.9)
1.3
(34.3)
11.6
(52.9)
20.7
(69.3)
26.6
(79.9)
31.6
(88.9)
33.1
(91.6)
31.2
(88.2)
24.6
(76.3)
14.5
(58.1)
4.4
(39.9)
−4.4
(24.1)
15.7
(60.3)
Mean daily minimum °C (°F) −10.3
(13.5)
−3.5
(25.7)
5.9
(42.6)
14.2
(57.6)
19.8
(67.6)
24.7
(76.5)
26.5
(79.7)
24.6
(76.3)
18.4
(65.1)
9.1
(48.4)
0.3
(32.5)
−7.6
(18.3)
10.2
(50.3)
Record low °C (°F) −28.9
(−20.0)
−24.5
(−12.1)
−10.4
(13.3)
−1.8
(28.8)
4.7
(40.5)
11.5
(52.7)
15.5
(59.9)
11.6
(52.9)
1.3
(34.3)
−5.7
(21.7)
−17.8
(0.0)
−26.1
(−15.0)
−28.9
(−20.0)
Average precipitation mm (inches) 0.9
(0.04)
0.5
(0.02)
0.7
(0.03)
0.9
(0.04)
1.0
(0.04)
2.6
(0.10)
2.0
(0.08)
2.0
(0.08)
1.4
(0.06)
1.2
(0.05)
0.6
(0.02)
0.9
(0.04)
14.7
(0.6)
Average precipitation days (≥ 0.1 mm) 1.0 0.3 0.3 0.7 1.1 2.0 2.3 1.9 0.9 0.8 0.5 1.1 12.9
Average snowy days 2.5 0.9 0 0 0 0 0 0 0 0 0.2 2.6 6.2
Average
relative humidity
(%)
56 40 25 23 25 27 30 31 35 45 50 56 37
Mean monthly sunshine hours 121.8 172.0 234.2 263.7 308.4 301.6 303.3 299.6 273.5 238.6 163.7 108.2 2,788.6
Percent possible sunshine 41 57 62 65 67 66 66 71 74 71 57 39 61
Source 1: China Meteorological Administration[5][6][7]
Source 2: [8]

Vegetation and agriculture

Map including the Turfan Depression (labeled as T'U-LU-FAN P'EN-TI) (1975)
Qingnian Lu, a Turpan city street shaded by grapevine trellises in China's Grape Valley

On the shores of

true melons. Among the fruit, the grapes stand out: more than 100 varieties of grape are cultivated in the area and it accounts for 90% of China's seedless grape crop. Other specialty agricultural products of the region are Donghu Hami melons and long-staple cotton
.

Sources

Notes

  1. ^ After the
    Afar Depression
    within the accuracy of reported measurements (−155 m to −153 m). "NASA - Bogda Mountains". www.nasa.gov. Retrieved 2009-10-09.
  2. ^ "If you can stand the heat, then the Turpan Basin is the place to be". Shanghai Daily. April 5, 2010. Archived from the original on April 7, 2010.
  3. ^
  4. ^ a b S. Frederick Starr (ed.). Xinjiang: China's Muslim Borderland: China's Muslim Borderland. Routledge. p. 266.
  5. ^ 中国气象数据网 – WeatherBk Data (in Simplified Chinese). China Meteorological Administration. Retrieved 10 October 2023.
  6. ^ 中国气象数据网 (in Simplified Chinese). China Meteorological Administration. Retrieved 10 October 2023.
  7. ^ 中国地面国际交换站气候标准值月值数据集(1971-2000年). China Meteorological Administration. Archived from the original on 2013-09-21. Retrieved 2010-05-25.
  8. ^ "Extreme Temperatures Around the World". Retrieved 2010-08-28.

External links