Tundra is located in Russia, Greenland, Canada, Europe, Antarctica, the tip of South America and on any mountain top. The three types of tundra are alpine, arctic and antarctic. more than half of the tundra is located in Antarctica because thats all it is.

The  tundra in Antarctica is Antarctic tundra. The tundra on any moutain top is alpine tundra. And finally tundra on the northern edge of the world  is arctic tundra.