What does this terms means below the arctic zone?

The term "below the Arctic zone" generally refers to regions that lie south of the Arctic Circle, which is the latitude of approximately 66.5°N. These areas experience milder climates and are characterized by a variety of ecosystems, including temperate forests, grasslands, and tundra, depending on the specific location. Unlike the Arctic zone, which has extreme cold and ice-covered landscapes, regions below the Arctic enjoy more seasonal variations and biodiversity.