East Siberian Sea runoff into the East Siberian Sea is relatively small at about 250 km/year that makes only 10% of the total runoff in all the Arctic seas of Russia. The largest contribution is from the Kolyma River at 132 km, followed by the Indigirka River at 59 km. Most runoff (90%) occurs in summer; it is concentrated near the coast, owing to the weak river currents, and therefore does not significantly affect the sea hydrology. The water exchange between the neighboring seas is as follows. The annual outflow to the Laptev Sea, Chukchi Sea and Arctic Ocean is 3,240, 6,600 and
East Siberian taiga quite warm for the northerly location. Precipitation is low, ranging from to , decreasing from east to west. The topography of this ecoregion is varied, consisting of wide, flat plains and areas of karst topography. In contrast to the neighbouring West Siberian taiga, large bogs and wetlands are conspicuously absent. Some trees also shed their leaves annually, a characteristic of deciduous forests. Vegetation consists mainly of vast, dense forests of Dahurian Larch ("Larix gmelinii"), with Siberian Larch ("Larix sibirica") and hybrid between the Dahurian and Siberian Larches ("Larix x czekanowskii") occurring as one moves to the west. Cranberry ("Vaccinium oxycoccus")