Polar regions

Earth's frigid zones surrounding the North and South Poles.

Original charts by Willem Barentsz, map drawn by Cornelis Claesz ("Cornelius Nic · Public domain

The polar regions, also called the frigid zones or polar zones, are Earth's polar ice caps surrounding the geographical North and South Poles, lying within the polar circles. These high-latitude areas are dominated by floating sea ice in the Arctic Ocean and by the Antarctic ice sheet on the continent of Antarctica and the Southern Ocean.

Last updated 2026-09-29 from the source article.

Quick Facts

Field

Geography and climate

Known for

Extremely cold temperatures
heavy glaciation
extreme daylight variations
and minimal solar radiation

North pole region

Arctic, with settlements and claims by the United States, Canada, Denmark, Norway, Finland, Sweden, Iceland, and Russia

Facts from the source article.

Lore & Background

The polar regions receive less intense solar radiation than other parts of Earth because the Sun's energy arrives at an oblique angle, spreading over a larger area and traveling a longer distance through the atmosphere. The axial tilt of Earth, at 23.5°, has the most effect on polar climate, but because these regions are farthest from the equator, they receive the weakest solar radiation and are generally frigid year round. Large amounts of ice and snow further reflect and weaken the sunlight, contributing to the cold.

Reader's Guide

The polar regions are significant as Earth's coldest and most extreme climatic zones, characterized by heavy glaciation, short cold summers, and extreme variations in daylight hours—twenty-four hours of daylight in summer and complete darkness at mid-winter. The Arctic region supports diverse human settlements and cultures, with countries such as the United States, Canada, Denmark, Norway, Finland, Sweden, Iceland, and Russia claiming territories. In contrast, the Antarctic region has no permanent human habitation but hosts research stations operated by the United States, Argentina, New Zealand, and Russia. The Antarctic coastal ecosystem is complex, with upwelling nutrients feeding krill, which in turn support creatures from penguins to blue whales. The 1959 Antarctic Treaty defines the Antarctic as south of 60° south latitude. These regions are distinguished from the tropics and middle latitude belts and are critical for understanding global climate patterns and cryospheric processes.

Frequently Asked Questions

What are Polar regions known for?

They are defined by brutally cold temperatures, massive glaciation, dramatic swings between near-constant daylight and darkness, and very low incoming solar radiation. These conditions make them some of the most extreme environments on the planet.

Which research stations operate in the Polar regions?

Notable facilities include McMurdo Station, Palmer Station, the Amundsen–Scott South Pole Station, Esperanza Base, Marambio Base, Scott Base, and Vostok Station. These outposts support year-round scientific work on ice, atmosphere, and marine biology.