Geographical zone

In the two temperate zones, consisting of the tepid latitudes, the Sun is never directly overhead, and the climate is mild, generally ranging from warm to cool.

The frigid zones are the coldest regions of Earth and are generally covered in ice and snow.

The North Frigid Zone includes the United States (only the state of Alaska), the northern regions of Canada (the Northwest Territories, Nunavut, and Yukon), Greenland (Denmark), Norway, Finland, Sweden, and Russia.

The concept of a geographical zone was first hypothesized by the ancient Greek scholar Parmenides[2] and lastingly modified by Aristotle.

[3] Both philosophers theorized the Earth divided into three types of climatic zones based on their distance from the equator.

Today, the most commonly used climate map is the Köppen climate classification, developed by Russian climatologist of German descent and amateur botanist Wladimir Köppen (1846–1940), which divides the world into five major climate regions, based on average annual precipitation, average monthly precipitation, and average monthly temperature.