Siberian Tundra
The Chekanovsky Ridge rises between the lower courses of the Lena and Olenyok in northern Siberia. Its slopes feed streams on either side, including the Kelimyar, which joins the Olenyok before that river reaches the Laptev Sea. Low ridges and valleys interrupt the Arctic tundra, where vegetation is sparse and winter ice covers the waterways for many months. The brief summer brings a short interval of thaw.