Antarctica is the largest desert on Earth [1, 2, 3].

This classification challenges common perceptions of deserts as sandy, hot landscapes and highlights how climatologists define arid environments based on moisture rather than temperature.

Weather specialist Kayleen Sawatzky of CTV News said the geographical distinction in a recent report [1]. While many people associate deserts with the Sahara or other sandy regions, the technical definition of a desert relies on precipitation levels [1, 4].

Antarctica qualifies as a desert because it receives the least amount of rainfall of any region on the planet [1, 4]. This lack of moisture makes it the driest place on Earth, a condition that persists despite the continent being covered in ice [1, 4].

The southernmost continent maintains this status because its extreme cold prevents moisture from entering the atmosphere in significant quantities. This creates a cycle where the region remains chronically arid [1, 4].

By focusing on the five Ws of the region's climate, the report clarifies that the presence of ice does not negate the desert classification. Because the precipitation is so low, the land remains technically dry [1, 4].

“Antarctica is the largest desert on Earth”

The classification of Antarctica as the largest desert underscores the scientific distinction between a biome's temperature and its aridity. By defining deserts through precipitation rather than surface material or heat, scientists can more accurately categorize global climate zones and track how moisture patterns shift in the most extreme environments on the planet.