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.
Summer in the tundra brings 24-hour sunshine that still wonât raise temperatures above 50 degrees Fahrenheit. Temperatures will stay below freezing for nine months or longer during a one-year period in the tundra, averaging out at 16 degrees Fahrenheit annually. Considerations. The tundra doesnât receive very much annual rainfall. As a resident of the tundra, you could expect to see 10 inches of precipitation a year or less.