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.
You can find the tundra climate in KÃ¶ppen's E climate category. The Estands for ice climates. The average temperature of the warmest month is below 50Â° F. The tundra climate spans from most of Greenland to parts of Alaska, northern Canada, and northern Russia.