What is the largest desert ecosystem in the world?

The Sahara Desert is recognized as the largest desert ecosystem in the world, covering an area of approximately 9.2 million square kilometers (3.6 million square miles). It spans several countries in North Africa and is characterized by its arid climate, extreme temperatures, and unique biodiversity adapted to such harsh conditions. The Sahara is classified as a subtropical desert, which means it receives very little rainfall, averaging around 3 inches annually.

In contrast to the Sahara, the Atacama Desert, despite being one of the driest places on Earth, is much smaller, while the Gobi Desert primarily stretches across China and Mongolia and is significantly less expansive. The Kalahari Desert, while notable for its diverse ecosystems and wildlife, also covers a smaller area compared to the vast Sahara. This distinction solidifies the Sahara's status as the largest desert ecosystem globally, encompassing a variety of habitats and ecological zones within its boundaries.