Thar desert, a desert in southeastern Pakistan. To the east of the Indus and Satlej rivers, it is an extension of the Indian desert. It covers an area of about 200,000 square kilometers. Dunes are generally 30-90 meters high, and the highest is 150 meters. The climate is dry and hot, the hottest month in summer is 48-5 1℃, the annual rainfall is 150-250 mm, and there are strong sandstorms in May and June. There are seasonal salt lakes and dry river beds, and only deep water is available. Most residents are engaged in animal husbandry. Produce wheat, millet, cotton, etc.

Indian desert is formed by subtropical high. The air sinks and warms, which hinders surface convection and hardly causes rainfall. In addition, the wind and airflow in the western desert first pass through the arid plateaus of Afghanistan and Baluchistan, but it can't cause rainfall when it falls in this area. The monsoon from the east to the Ganges loses water vapor along the way, and then falls to Punjab, where the air sinks and warms, so it can't cause rain.