The Metro Lines run: 1  Red: serves the northern part of the city. Main stations are: Union Station, Metro Center, Chinatown and Dupont Circle. 2  Blue: runs west-east through the city and then south. Main stations are: Capitol South, Smithsonian, McPhearson Square (White House), Arlington National Cemetery, National Airport.
Climate In the arctic tundra there are two seasons: winter and summer. In the summer, the sun is present almost 24 hours a day. This sun however, only warms the tundra up to a range of about 3Â°C to 12Â°C.In the winter the opposite light conditions are present.There are several weeks where the sun never rises.limate In the arctic tundra there are two seasons: winter and summer. In the summer, the sun is present almost 24 hours a day. This sun however, only warms the tundra up to a range of about 3Â°C to 12Â°C. In the winter the opposite light conditions are present. There are several weeks where the sun never rises.
The characteristics of a tundra are:- extremely cold climate-low biotic diversity-simple vegetation structure-limitation of drainage-large population oscillations-short season of growth and reproduction-energy and nutrients in the form of dead organic material.rctic tundra contains areas of stark landscape and is frozen for  much of the year. The frozen soil makes it impossible for trees to  grow. Alpine tundra does not contain t â¦ rees because the climate and  soils at high altitude block tree growth.