The Patagonian desert is a temperate desert located in southern Argentina and Chile. It is the largest desert in the Americas and one of the few temperate deserts in the world. Here is a detailed explanation of why the Patagonian desert is considered a temperate desert:

1. Location and Climate:
- The Patagonian desert is situated in the southern regions of Argentina and Chile, extending from the Atlantic Ocean to the Andes Mountains.
- It lies in the temperate zone, where the climate is influenced by the cool ocean currents and the mountain ranges.
- The region experiences mild summers and cold winters, with average temperatures ranging from 8°C (46°F) in the summer to -2°C (28°F) in the winter.
- The average annual precipitation is relatively low, ranging from 100 to 400 mm (4 to 16 inches), which is a defining characteristic of deserts.

2. Vegetation:
- The vegetation in the Patagonian desert is sparse but diverse. It consists mainly of shrubs, grasses, and low-growing plants.
- Some of the common plant species found in this desert include the thorny scrub, tussock grasses, and cushions plants.
- These plants have adaptations to survive in the arid conditions, such as deep root systems to access underground water sources and thick waxy leaves to reduce water loss through evaporation.

3. Wildlife:
- Despite the harsh conditions, the Patagonian desert is home to a variety of wildlife. It is known for its unique fauna, including several endemic species.
- Some of the iconic animals found in this desert are the guanaco (a relative of the llama), the mara (a large rodent), and the Darwin's rhea (a flightless bird).
- There are also several bird species, such as the Andean condor, which inhabit the cliffs and mountains of the region.

4. Human Settlements:
- The Patagonian desert has a low population density due to its harsh climate and limited resources.
- However, there are some small towns and settlements scattered across the desert, mainly focused on agriculture and tourism.
- The region is popular among tourists for its stunning landscapes, including glaciers, fjords, and mountains.

In conclusion, the Patagonian desert is considered a temperate desert due to its location in the temperate zone, its mild climate with distinct seasons, low precipitation, and unique desert flora and fauna.