It lies in the rain shadow of the Himalayas
Explanation
The climate of a region is significantly influenced by physiographic barriers. In the case of Ladakh, the Rain Shadow Effect caused by the Himalayan mountain range is the primary determinant of its arid, cold desert climate.
- It is located in the tropical high-pressure belt is Incorrect: While high-pressure belts are associated with dry conditions, Ladakh is located at a higher latitude and altitude than the typical subtropical high-pressure belt. The aridity here is not primarily due to planetary pressure belts but due to local relief features.
- It lies in the rain shadow of the Himalayas is Correct: Ladakh is situated to the north of the Great Himalayas. These high mountain ranges act as a massive barrier to the moisture-laden South-West Monsoon winds. As the winds rise on the southern slopes, they cause precipitation; however, by the time they cross to the northern side (Ladakh), they have lost their moisture. This places Ladakh in the rain shadow zone, resulting in extremely low rainfall.
- The rivers do not evaporate enough water is Incorrect: Rainfall is driven by atmospheric circulation and moisture transport from oceans, not by the evaporation of local rivers.
- It is too far from any ocean is Incorrect: While distance from the sea (continentality) affects the temperature range, it is not the primary reason for the lack of precipitation in this specific context. Without the Himalayan barrier, the region would receive significantly more moisture despite its inland location.
Key Takeaway:
Ladakh is a Cold Desert primarily because it lies in the rain shadow area of the Great Himalayas, which prevents the entry of monsoon winds.