The water cycle in the Tundra has a low precipitation rate at 50-350mm which includes melted snow
There is very low moisture in the Tundra because it is rarely humid because of the extremely low temperatures.
There is a lot of bodies of water in the Tundra because most of the sun's energy goes to melting all of the snow so the temperatures remain low and the soil/water remain frozen for years.
There is a very sharp increase in river flow once all the ice begins to melt but low amount near the permafrost barrier.
Temporary store of liquid due to loads to permafrost.
Carbon Cycle
The Cycle Cycle is used by snow and ice which is 79% made up of Carbon.
The loads of permafrost in the Tundra affect the Carbon Cycle when the Carbon and Nitrogen from dead organism beings to get caught and stuck in the permafrost.