Loewinson Lessing Lake

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Loewinson Lessing Lake
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Geographical location Taimyr Peninsula , Byrranga Mountains , Krasnoyarsk Region ( Russia )
Tributaries Krasnaya ("Red River")
Drain Krasnaya → Ledjanaja → Lake Taimyr ( Taimyra )
Places on the shore no
Location close to the shore Chatanga
Data
Coordinates 74 ° 29 '30 "  N , 98 ° 36' 0"  E Coordinates: 74 ° 29 '30 "  N , 98 ° 36' 0"  E
Loewinson Lessing Lake (Krasnoyarsk Territory)
Loewinson Lessing Lake
Altitude above sea level f1approx. 47
surface approx. 25 km²dep1
length approx. 12 kmdep1
width approx. 3 kmdep1
Maximum depth approx. 112 m
Catchment area approx. 500 km²dep1
Lake Taymyr-txu-oclc-6654394-ns-46-48-2nd-ed.jpg
Loewinson-Lessing-See, west of the great Taimyrsee ,
u. a. with Byrranga Mountains and Taimyra ( US military ; 1964)

The Loewinson-Lessing-See ( Russian Озеро Левинсон-Лессинга ) is an approximately 25 km² lake in the Byrranga Mountains in Northern Siberia and Russia on the Taimyr Peninsula . It received its name in honor of the Russian geologist and petrographer Franz Loewinson-Lessing .

geography

location

The Loewinson-Lessing-See is part of the tundra about 900 km beyond or north of the Arctic Circle in the central part of the maximum 1125  m high Byrranga Mountains, which are a little north-northeast of the lake up to 551  m high. It is located about 10 km west of the western part ( Ledjanaja Bay ) of the large Taimyr Lake . It is traversed by the Krasnaya , which flows over the Ledjanaja into the Taimyrsee and thus into the Taimyra . There are no settlements on the bank, but the village of Chatanga about 300 km south-southeast on the Chatanga River .

The lake is part of the five-part Taimyr Biosphere Reserve , founded as a nature reserve on February 23, 1979 , which was designated as a biosphere reserve by UNESCO in 1995 and is around 2.72 million hectares in size.

Data

Its water level is about 52  m (according to other information 47 or 48  m ) high. The catchment area of the lake covers around 500 km². The lake reaches its greatest width of almost 3 km in a bay in the southern part and its greatest depth in the almost 2 km wide central part with 112 m (according to other information 108 m). The lake basin, which was filled by a glacier in the cold ages , represents a cryptodepression because its bottom is about 60 to 65 m below sea level, depending on the above sea level.

climate

The area of ​​the Loewinson-Lessing-See in the north Siberian tundra has permafrost soil . In the short summer period with around 50 frost-free days, the daily temperature reaches an average value of 6.5 ° C. In winter the daily mean value is -33.1 ° C.

Hydrology

The main tributary, the Krasnaya ("Red River"), flows into the northern end of the lake. During the frost-free period, this watercourse supplies the lake to the lake on around 75 days of the calendar year in very fluctuating amounts of water and loose mineral material . The amount of water flowing in depends on the rainfall. In 1995 a suspended solids input of 10,500 tons was measured at the main inflow .

The outflow of the lake at the southern end flows into the Ledjanaja ("ice river") after just under 2 km, which flows to the nearby Taimyrsee and thus the Taimyra in an easterly direction.

geology

The basin with the Loewinson-Lessing-See emerged from a tectonic rift zone that belongs to the Paleozoic Byrranga fold zone. Within the geomorphographic shape of the surrounding low mountain range, the lake forms a depression of about 600 meters. The mountain slopes on the elongated lake sloping down to the shore are characterized by deep V-shaped erosion structures. The rocks around it are Permian in age and riddled with dolerite intrusions.

On the slopes along the lake there are marine deposits in the form of sand and gravel terraces at a height of about 200 meters and between 250 and 300 meters . They document an earlier advance of sea level on the Taimyr Peninsula. The sediments close to the bank and below its water level, on the other hand, have a limnic origin.

The area of ​​the Loewinson-Lessing-See with the system of its tributaries including other smaller lakes was scientifically investigated intensively between 1994 and 1996 and topographically surveyed. The Alfred Wegener Institute , for example, was involved in the international research work. In this context, exploratory drillings were made in the sediment deposits of the tectonically created lake basin. The insights gained from the drill core analyzes enable coherent statements to be made about the paleogeography of the region over a period of the past 8,000 years due to the uniformity of the deposits. This work serves to improve the understanding of water and sediment transport in river systems within this permafrost region.

literature

  • Russian-German Cooperation: The Expedition TAYMYR 1994 . In: Christine Siegert, Dmitry Bolshiyanov (ed.): Reports on polar research . tape 175 , 1995, ISSN  0176-5027 (English, online [PDF]).

Individual evidence

  1. ↑ a b c Topographic map (1: 200.000, Bl. S-47-XV, XVI, Ed. 1986)
  2. ↑ a b c d e f g h i j Особо охраняемые природные территории - Таймырский , information on the Taimyr nature reserve on the website biodat.ru (Russian).
  3. ↑ М. А. Анисимов, О. Г. Ромащенко, М. В. Рязанова: Морфометрический анализ террасовых уровней оз. Левинсон-Лессинга (Центральный Таймыр) , Изв. РГО. 2000. Т. 132. Вып. 2, с. 76-78 (Russian).
  4. ↑ Siegert, Bolshiyanov: The Expedition Taymyr 1994 , page 8, Table 3.1

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