What are the conditions necessary for the formation of sand dunes? Hi, Dunes are formed by interaction with the wind. Wind speeds of 10 to 20 mph,. are necessary for sand to start saltating under the direct pressure of the wind.
Winters are very harsh in Tundra climate. Winter months temperatures are usually between -18 and -50 degrees. Summer temperatures range from 35-50 degrees. High latitudes are the main cause of of the low temperatures. These areas mainly receive indirect sunlight.
The type of precipitation that falls in this climate is mostly snow in the winter, and in the summer it is rain, with occasional snow. The latitude range for the tundra is from the arctic circle to 60Â° to 70Â° latitude North. Parts of Alaska and northern Canada contains tundra biome and climates.