What is the beginning of very cold area in Antarctica?

The beginning of the very cold area in Antarctica is marked by the Antarctic Circle, an imaginary line of latitude that encircles the continent at a distance of approximately 2,000 kilometers (1,243 miles) from the geographic South Pole. The region south of the Antarctic Circle, commonly known as the Antarctic region or Antarctica proper, experiences extremely low temperatures and harsh weather conditions due to its isolation from the moderating influence of warmer ocean currents and its high elevation.