Which continent has the widest tropical desert climate?

Because there is the Sahara Desert, the largest tropical desert in the world.

The Sahara Desert is the largest desert in the world, covering almost the whole of North Africa. It is about 4,800 kilometers (3,000 miles) from east to west, and about 1, 300 ~ 1, 900 kilometers (800 ~ 1, 200 miles) from north to south, with a total area of about 8.6 million square kilometers (3.32 million miles). The Sahara desert borders the Atlantic Ocean in the west, the Atlas Mountains and the Mediterranean Sea in the north, the Red Sea in the east and the semi-desert grassland in the Sahel in the south.

The Sahara Desert is the largest desert in the world except Antarctica. It is located in the north of Africa, with extremely harsh climatic conditions, and it is one of the most unsuitable places for biological growth on earth. Sahara means "big desert" in Arabic. Located in the southern Atlas Mountains and the Mediterranean Sea (about 35 N), about14 N (250 mm isohyet), it starts from the Atlantic coast in the west and reaches the Red Sea coast in the east. Spanning the northern part of the African continent, it is 5,600 kilometers long from east to west and 1.600 kilometers wide from north to south, with a total area of about 9.065 million square kilometers, accounting for about 32% of the total area of Africa. You can put the whole of America in. The name "Sahara" comes from Arabic. 1? 3? 1? 5? 1? 9? 1? 9? 1? 3. It was introduced from the language of Tuareg, a local nomadic people, which means "desert" in their language. This desert was formed about 2.5 million years ago.

The Sahara desert starts from the Atlantic coast in the west, reaches the Atlas Mountains and the Mediterranean Sea in the north, the Red Sea in the east and the Sudan and Niger River basins in the south. The Sahara desert is divided into several parts: Western Sahara; Central plateau mountainous areas (including Ahagar Plateau in Algeria, Aier Plateau in Niger and Tibesti Plateau in Chad; The eastern part is the most desolate area, especially the Tenare Desert and the Libyan Desert. The highest point of the Sahara Desert is Kuxi Mountain, located in the middle of the Tiber Sahara Desert, with an altitude of 34 15 meters.

The Sahara desert divides the African continent into two parts, North Africa and Southern Black Africa. The climate and culture of these two parts are completely different. The southern border of the Sahara desert is semi-arid savanna, which is called "Sahel" in Arabic, and then it is called "Sudan" in Arabic, which means black Africa.

The climate of the Sahara desert is controlled by the north-south transition of the trade winds, and there are often many extreme situations. It has the highest evaporation rate in the world, and has the largest area record of no rain for several years. At high altitude, the temperature can reach frost and freezing, while at low altitude, the hottest weather in the world can be found.

The Sahara desert is dominated by two climatic conditions: the arid subtropical climate in the north and the arid tropical climate in the south. The arid subtropical climate is characterized by large annual and daily temperature changes, from cold to cool winter and hot summer to the highest precipitation. The annual average daily temperature is about 20℃(68℉). The average temperature in winter is 13℃(55℉). It is very hot in summer. The highest temperature in Al-Aziziyah, Libya reached a record 58℃( 136℉). The annual precipitation is 76 mm (3 inches). Although the rainfall varies greatly, most of it occurs during 65438+February ~ March. Another precipitation climax is August, which is characterized by thunderstorms. This kind of rainstorm will lead to huge flash floods and rush into areas where there is no rain. The characteristics of arid tropical climate are that with the change of the position of the sun, the annual temperature cycle is strong; Mild and dry winter and hot and dry season are followed by changeable summer rain. The annual average daily temperature difference in the arid tropical region of the Sahara desert is 17.5℃(3 1.5℉). The average temperature in the coldest month is basically the same as that in the north subtropical region, but the daily temperature difference is not so great. It is very hot in late spring and early summer, and the high temperature of 50℃( 122℉) is not uncommon. Although there is little precipitation in arid tropical hills all year round, the summer rainfall in lowlands can reach the highest. In the north, this kind of rainfall mostly appears in the form of thunderstorms. The average annual precipitation is about 125 mm (5 inches), and sometimes it snows in the central hills. The cold canary airflow on the western edge of the desert reduces the temperature, thus reducing the convective rain, but sometimes fog appears when the humidity increases. Winter in the south of the Sahara desert is a period when Hamdan wind blows, which is a dry northeast wind with sand and other small dust particles.