Sudan copper, gold, granite, gypsum, iron, kaolin, lead, manganese, mica, natural gas, nickel, petroleum, silver, tin, uranium and zinc. The amount of rainfall increases towards the south. The central and the northern part have extremely dry desert areas such as the Nubian Desert to the northeast and the Bayuda Desert to the east; in the south there are swamps and rainforest. Sudan's rainy season lasts for about three months (July to September) in the north, and up to six months (June to November) in the south. The dry regions are plagued by sandstorms, known as haboob, which can completely block out
Desert climate major examples of BWk climates. The Ladakh region, and Leh city in the Great Himalayas in India, also has a cold desert climate. This is also found in Europe, primarily in Bardenas Reales near Tudela, Navarre and high altitude parts of the Tabernas Desert in Almería, Spain. Arctic and Antarctic regions also receive very little precipitation during the year, owing to the exceptionally cold dry air; however, both of them are generally classified as having polar climates because they have average summer temperatures below . Desert climate The desert climate (in the Köppen climate classification "BWh" and "BWk"), also known