The Worlds Largest Sand Desert

Posted by Kyle Brookings on Monday, June 25, 2018
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The Rub' al Khali desert is the largest contiguous sand desert in the world, encompassing most of the southern third of the Arabian Peninsula.

The desert is 1,000 kilometres long, and 500 kilometres wide. Its surface elevation varies from 800 metres in the southwest to around sea level in the northeast.

The region is classified as "hyper-arid", with annual precipitation generally less than 35 millimetres, and daily mean relative humidity of about 52% in January and 15% in June-July.

Daily maximum temperatures average 47°C in July and August, reaching peaks of 51°C. The daily minimum average is 12°C in January and February, although frosts have been recorded. Daily extremes of temperature are considerable.

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