History of South Asia - Foundations Geography

South Asia: Geography and Scope Understanding South Asia South Asia is the southern subregion of Asia, defined by both geographic features and shared cultural characteristics. When geographers and political scientists refer to "South Asia," they mean a clearly bounded region that includes Bangladesh, Bhutan, India, Maldives, Nepal, Pakistan, and Sri Lanka. Afghanistan is often included as well, making eight countries that are members of the South Asian Association for Regional Cooperation (SAARC). The term "South Asia" is the preferred neutral way to describe this region. You might also encounter the older term "Indian subcontinent," which refers to the same geographical area. Both describe the same basic region, though "South Asia" is favored in modern academic writing because it doesn't center everything around India. Geographic Boundaries South Asia occupies a distinctive geographic location that makes it relatively easy to identify on a map. The region covers approximately 4.4 million square kilometers—about 10% of Asia's total land area. The region's boundaries are defined by major natural features: To the North: The Himalaya Mountains form a dramatic barrier, along with the Karakoram and Pamir ranges To the West: The Hindu Kush mountains mark the boundary To the East: The Arakan Yoma (Myanmar hills) serve as the eastern limit To the South: The Indian Ocean provides a natural boundary, with the Arabian Sea on the west and the Bay of Bengal on the east Together, these features give South Asia its characteristic diamond-like shape. Importantly, the Indian Plate—a massive geological plate that underlies most of South Asia—separates the region from the Eurasian Plate, making it geologically distinct as well as geographically isolated from the rest of Asia. The Core Countries and Their Locations Understanding where each major country sits within South Asia helps clarify the region's geography: India occupies the central and largest portion of the peninsula. It extends from the Himalayas in the north all the way to the Indian Ocean in the south. Pakistan lies to the west of India, separated by the border but sharing many historical and cultural connections. Bangladesh sits to the east of India and includes the vast Ganges Delta—the world's largest river delta. This low-lying region is particularly vulnerable to environmental changes. Nepal and Bhutan are mountainous Himalayan states located directly north of India. These countries are defined by their dramatic terrain and high altitude. Sri Lanka is an island nation situated off the southeastern tip of the Indian peninsula, separated by the Palk Strait. The Maldives are a chain of low-lying coral islands in the Indian Ocean, southwest of India. Despite their small size and isolation, they are an important part of South Asia. Physical Geography and Terrain South Asia is remarkably diverse in its physical features. The region contains glaciers in its northern mountains, dense rainforests in its western and eastern edges, broad valleys along major rivers, deserts in the northwest, and extensive grasslands in central areas. The major mountain ranges define much of the region's character: The Himalayas in the north are the world's highest mountain range The Karakoram in the northwest contains some of the world's largest glaciers The Hindu Kush in the west connects South Asia to Central Asia The Pamir mountains in the far north These mountains are not merely scenic—they fundamentally shape climate, water availability, and human settlement patterns throughout South Asia. Climate Zones South Asia experiences four distinct climate zones, each with important consequences for human life and agriculture: Dry Subtropical Continental Climate appears in northern India and Pakistan. This region receives relatively little precipitation and experiences extreme temperature variations between seasons. Equatorial Climate dominates southern India and southwest Sri Lanka, characterized by high humidity and consistent warmth year-round. Tropical Climate covers most of the peninsula. Within this broad category, there's significant variation: the northwest experiences hot subtropical conditions, Bangladesh has a warm tropical climate with cool winters, and the central region transitions to semi-arid conditions. Alpine Climate defines the Himalayas and Hindu Kush, with cold temperatures, snow, and limited vegetation. The Monsoon System: The Region's Climate Engine The monsoon system is perhaps the single most important climate feature of South Asia. Understanding monsoons is essential to understanding everything from agriculture to water resources to flooding risks in the region. The summer monsoon (southwest winds) typically begins in March and peaks from June to September. This is the critical period: the summer monsoon delivers 70–90% of South Asia's annual precipitation. Entire agricultural systems, water supplies, and economic cycles depend on the timing and intensity of these rains. When the monsoon arrives on schedule with adequate rainfall, harvests are successful. When it fails or is delayed, droughts occur. The winter monsoon (northeast winds) dominates in Sri Lanka and the Maldives, bringing rainfall to these southern regions during the winter months when other parts of South Asia are dry. This seasonal rhythm has shaped South Asian civilizations for thousands of years. Traditional agricultural practices, water storage systems, and even settlement patterns all reflect adaptation to the monsoon cycle. Subregional Divisions South Asia itself can be divided into three distinct subregions, each with its own characteristics: Northwestern South Asia includes the Indus River valley and the ancient Indus Valley Civilization region. Historically, this has been the most frequently conquered part of South Asia due to its accessibility from Central Asia and West Asia. Eastern South Asia comprises Bangladesh, Bhutan, eastern and northeastern India, and Nepal. This region contains the Ganges Delta and the world's largest river delta system. The Ganges and Brahmaputra rivers—two of the world's largest—flow through this region into the Bay of Bengal. Eastern South Asia is densely populated, with over 441 million people (about 25% of South Asia's total population). Southern South Asia includes southern India, the Maldives, and Sri Lanka. This region is predominantly Dravidian in culture and language, distinguishing it from the Indo-European north. Population and Settlement The Indo-Gangetic Plain is the demographic heart of South Asia. This broad, fertile plain shaped by the Ganges River system is home to approximately half a billion people, making it one of the world's most densely populated regions. However, despite its size, it remains the poorest subregion of South Asia. The concentration of population in this plain reflects the region's agricultural potential and water availability, underscoring how geography directly shapes human settlement. Climate Change and South Asia Why Climate Change Matters for South Asia South Asia is particularly vulnerable to climate change. The region's dependence on monsoon rainfall, its dense population in vulnerable coastal and river delta areas, and its reliance on glacier-fed rivers create multiple points of risk. Understanding these vulnerabilities is crucial for grasping South Asia's environmental future. Projected Climate Changes Scientists expect several major climate shifts: Intensified Monsoon Rainfall: The summer monsoon is expected to bring even more intense precipitation. In extreme warming scenarios, precipitation events could become up to 15 times more frequent than today. This means more severe flooding in vulnerable areas like Bangladesh and the Ganges Delta. Glacier Melt: The Hindu Kush glaciers are particularly threatened. Models project that up to two-thirds of glacier ice in the Hindu Kush could melt by 2100. Since these glaciers feed major rivers like the Indus and Ganges that supply water to over 220 million people, this poses an enormous threat to water security. Socio-Economic Consequences The impacts of climate change on South Asia extend far beyond the environment. They threaten basic human needs and economic stability: Water Scarcity: By 2050, reduced glacier meltwater may cause severe water shortages in the Ganges and Indus river basins during dry seasons. This will affect millions of people and critical agricultural areas. Coastal Flooding and Sea-Level Rise: Major Indian coastal cities—including Mumbai, Kolkata, Cuttack, and Kochi—could have large areas below high tide level by 2030. This threatens billions of dollars in infrastructure and assets. Even more dramatically, sea-level rise could displace between 0.9 and 2.1 million people in Bangladesh by 2050, and could force relocation of up to one-third of Bangladesh's power plants by 2030. Health Impacts: Climate change will increase the incidence of infectious diseases like dengue fever and diarrheal diseases, and will increase heat-stress mortality as temperatures rise. <extrainfo> Economic Costs The economic impact of climate change on South Asia is staggering. The region could lose about 2% of its GDP by 2050 due to climate change, rising to 9% by the end of the century under worst-case warming scenarios. India faces the world's highest social cost of carbon, meaning the country is particularly economically exposed to greenhouse gas emissions. </extrainfo>