Dry climate
The dry climate is generally defined as an average annual precipitation of less than 500 mm, but the German geographer Köppen defined the dry climate as when the average annual precipitation did not reach the established dryness limit due to the seasonal distribution of annual mean temperature and precipitation. It is mainly located in the sub-tropical high-pressure zone, the southern, 30-degree north latitude, the interior of the continent lacking moisture, and the west coast of the continent where the Korean Wave flows. The dry climate is divided into a desert climate and a step climate, which is also generally divided by an average annual precipitation of 250 mm, but Köppen distinguishes it based on the desert limit, which is half the dry limit.