Question

2. The boundary of polar region is ____________​

Answer 1

Answer:

For the Arctic circle, the actual boundary is 80–100 km north of the circle during the winter, and 80–100 km south of the circle during the summer. For the Antarctic circle, the directions of the 80–100 km shift are in the opposite direction (north in the summer, and south in the winter).

Answer 2

The northern boundary, therefore, is often considered to be the line at 60 degrees south latitude, which was agreed to by the signatories of the Antarctic Treaty System in 1959. The Antarctic region becomes somewhat larger if the zone of Antarctic Convergence is used to indicate the northern boundary.