Yana River: Encyclopedia - Yana River

Yana River

The Yana River (Яна in Russian), a river in Sakha in Russia, located between the Lena to the west and the Indigirka to the east.

It is 872 km in length. The area of its basin is 238,000 km², whilst its annual discharge totals approximately 25 cubic kilometres (20 million acre-feet. Most of this dicharge occurs in May and June as the ice on the river breaks up. The Yana freezes up on the surface in October and stays under the ice until late May - early June. In the Verkhoyansk area, it stays frozen to the bottom for 70 to 110 days, and partly frozen for 220 days of the year.

The river begins at the confluence of the rivers Sartang and Dulgalakh. As the Yana flows into the Yansky Bay of the Laptev Sea, it forms a huge river delta (10,200 km²). There are approximately 40,000 lakes in the Yana basin, including both alpine lakes formed from glaciation in the Verkhoyansk Mountains (lowland were always too dry for glaciation) and overflow lakes on the marshy plains in the north of the basin. The whole Yana basin is under continuous permafrost and most is larch woodland grading to tundra north of about 70°N, though trees extend in suitable microhabitats right to the delta.

The principal tributaries of the Yana are: Adycha, Oldzho, Abyrabyt, Bytantay. Most of these tributaries are short rivers flowing from the high Verkhoyansk Mountains.

Verkhoyansk, Batagay, Ust-Kuyga, Nizhneyansk are the main ports on the Yana.

The Yana basin is the site of the so-called "cold pole" of Russia, where the lowest recorded temperatures in the Northern Hemisphere are found. In the winter, temperatures in the centre of the basin average as low as -45 °C (-49 °F) and have reached as low as -71 °C (-96 °F) - though in the mountains it is believed that temperatures have reached -82 °C (-116 °F). Yakut folklore says, that, at such temperatures, if you shout to a friend and they can't hear you, it's because the words have frozen in the air! However, when spring comes the words "thaw" and one can hear everything that was said months ago!

The Yana River area is the first known site of human habitation in the Arctic, with evidence of habitation found in the delta from as early as 30,000 years ago (12,000 years before the LGM).

Category: Rivers of Russia

Adapted from the Wikipedia article "Yana River", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki