Topography

Asia is divided into Northern Lowlands, Central Mountain chains and Old plateaus of the south. Northern Lowlands are found to the south of the Arctic ocean covering the majority of Siberia. They are not fully plains, they have mountains and plateaus also. The Ural mountains found on the western side of the Northern Lowlands separate Asian continent from the European continent. Central mountain chain is found on the southern side of the Northern Lowlands. The mountain ranges of Asia are extended from the Pamir Knot which is located almost in the center of Asia. The Pamir Knot is known as the Roof of the World. The Hindukush and the Sulaiman are the 2 mountain ranges that extend towards the west of the Pamir Knot. 4 mountain ranges are seen towards the east of the Pamir Knot. The most important among them is Himalayas. The Kunlun and the Altin are the mountain ranges situated on the north of the Himalayas. Arakan Yoma is a large mountain range that runs first towards south-west from the eastern tip of the Himalayas and then runs towards the south. The highest peak in the world ‘Mt. Everest’ is the part of Central mountain chains. Old plateaus region is the third division of Asia. Arabia, Deccan and Indochina are the 3 major old plateaus. They are formed from old and hard rocks. This is a dry region which lies between the Red Sea and the River Tigris. Siberia, Tigris-Euphrates, Indus-Ganges-Brahmaputra, Hwang Ho-Yangtze-Sikiang are the principal plains in Asia.

The Obb, Yenisey, Lena of North Asia; Amur, Hwang Ho, Yangtze-Sikiang of East Asia; Mekong, Manum, Salwin, Irrawaddy, Brahmaputra, Ganges, Indus of South Asia are the main rivers of Asia.

Asia being very large and wide, has diverse climates in different regions and it can be divided into seven climatic zones as follows: (1) The Equatorial Climate, (2) The Monsoon Climate, (3) The Desert Climate, (4) The Mediterranean Climate, (5) The Cold Temperate Climate, and (6) The Tundra Climate.

Asia has extremely diverse climates and geographic features. Climates range from arctic and subarctic in Siberia to tropical in southern India and Southeast Asia. It is moist across southeast sections, and dry across much of the interior. Some of the largest daily temperature ranges on Earth occur in western sections of Asia. The monsoon circulation dominates across southern and eastern sections, due to the presence of the Himalayas forcing the formation of a thermal low which draws in moisture during the summer. Southwestern sections of the continent are hot. Siberia is one of the coldest places in the Northern Hemisphere, and can act as a source of arctic air masses for North America. The most active place on Earth for tropical cyclone activity lies northeast of the Philippines and south of Japan. The Gobi Desert is in Mongolia and the Arabian Desert stretches across much of the Middle East. The Yangtze River in China is the longest river in the continent. The Himalayas between Nepal and China is the tallest mountain range in the world. Tropical rainforests stretch across much of southern Asia and coniferous and deciduous forests lie farther north.

Political divisions:There are 48 states in Asia. Out of these (a) Eight countries of South Asia included in Regional Development of South Asia (SAARC), and (b) eleven countries of South East-Asia, (c) eight countries of Far East and Siberia, (d) five countries of Central Asia, and (e) sixteen countries of South-West Asia are also included.

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