Reference
- Indian Oceanthird largest ocean, c.28,350,000 sq mi (73,427,000 sq km), extending from S Asia to Antarctica and from E Africa to SE Australia; it is c.4,000 mi (6,400 km) wide at the equator. It constitutes about 20% of the world's total ocean area. The Indian Ocean is connected with the Pacific Ocean by passages through the Malay Archipelago and between Australia and Antarctica; and with the Atlantic Ocean by the expanse between Africa and Antarctica and by the Suez Canal. Its chief arms are the Arabian Sea (with the Red Sea, the Gulf of Aden, and the Persian Gulf), the Bay of Bengal, and the Andaman Sea. The continental shelf of the Indian Ocean is narrow. Madagascar and Sri Lanka, the largest islands in the ocean, are structurally parts of the continents as are Socotra, the Andaman Islands, and the Nicobar Islands; the Seychelles and the Kerguelen Islands are exposed tops of submerged ridges. The Laccadives, the Maldives, and the Chagos are low coral islands, and Mauritius and Réunion are high volcanic cones. The floor of the Indian Ocean has an average depth of c.11,000 ft (3,400 m). The Mid-Oceanic Ridge, a broad submarine mountain range extending from Asia to Antarctica, divides the Indian Ocean into three major sections—the African, Antardis, and Australasian. The ridge rises to an average height of c.10,000 ft (3,000 m), and a few peaks emerge as islands. A large rift, an extension of the eastern branch of the Great Rift Valley that runs through the Gulf of Aden, extends along most of its length (see seafloor spreading). The Mid-Oceanic Ridge, along with other submarine ridges, encloses a series of deep-sea basins (abyssal plains). The greatest depth (25,344 ft/7,725 m) is in the Java Trench, S of Java, Indonesia. The Indian Ocean receives the waters of the Zambezi, Tigris-Euphrates, Indus, Ganges-Brahmaputra, and Irrawady rivers. The surface waters of the ocean are generally warm, although close to Antarctica pack ice and icebergs are found. The Indian Ocean has two water circulation systems—a regular counterclockwise southern system (South Equatorial Current, Mozambique Current, West Wind Drift, West Australian Current) and a northern system, the Monsoon Drift, whose currents are directly related to the seasonal shift of monsoon winds. The southwest monsoon draws moisture from the Indian Ocean and drops heavy rainfall on the Indian subcontinent and Southeast Asia.
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Perspectives
The Indian Ocean
In this stimulating and authoritative overview, Michael Pearson reverses the traditional angle of maritime history and looks from the sea to its shores - its impact on the land through trade, naval power, travel and scientific exploration. This vast ocean, both connecting and separating nations, has shaped many countries' cultures and ideologies through the movement of goods, people, ideas and religions across the sea. The Indian Ocean moves from a discussion of physical elements, its shape, winds, currents and boundaries, to a history from pre-Islamic times to the modern period of European dominance. Going far beyond pure maritime history, this compelling survey is an invaluable addition to political, cultural and economic world history.
Reimagining Indian Ocean Worlds
This book breaks new ground by bringing together multidisciplinary approaches to examine contemporary Indian Ocean worlds. It reconfigures the Indian Ocean as a space for conceptual and theoretical relationality based on social science and humanities scholarship, thus moving away from an area-based and geographical approach to Indian Ocean studies. Contributors from a variety of disciplines focus on keywords such as relationality, space/place, quotidian practices, and new networks of memory and maps to offer original insights to reimagine the Indian Ocean. While the volume as a whole considers older histories, mobilities, and relationships between places in Indian Ocean worlds, it is centrally concerned with new connectivities and layered mappings forged in the lived experiences of individuals and communities today. The chapters are steeped in ethnographic, multi-modal, and other humanities methodologies that examine different sources besides historical archives and textual materials, including everyday life, cities, museums, performances, the built environment, media, personal narratives, food, medical practices, or scientific explorations. An important contribution to several fields, this book will be of interest to academics of Indian Ocean studies, Afro-Asian linkages, inter-Asian exchanges, Afro-Arab crossroads, Asian studies, African studies, Anthropology, History, Geography, and International Relations.
Ships and the Development of Maritime Technology on the Indian Ocean
Recognising the fundamental role both of shipping communities and the technologies crafted and shared by them, this book explores the types of ships, methods of navigation and modes of water-borne trade in the Indian Ocean region and the way they affected the development of distinctive settlements against a changing but strong sense of regional consciousness and identity.
Indian Ocean
- Films on Demand This link opens in a new window
Dr. Mathieu explains how the warming of the Indian Ocean affects ocean currents and subsequently climate and weather change.
Swimming with Sharks
- Films on Demand This link opens in a new windowA South African conservationist fights to change public perception on the predator species. She explains that Durban's shark nets are damaging marine ecosystems. Simon overcomes his fear by meeting an individual face to face, and learns that they are generally harmless to humans.
Exploring the Indian Ocean
- Films on Demand This link opens in a new windowOn this leg of his journey, Simon Reeve travels to Madagascar, Mauritius and the Seychelles—a tropical paradise threatened by Somali pirates.
Online Resources
- Indian Ocean and Indian summer monsoon: relationships without ENSO in ocean–atmosphere coupled simulationsThe relationship between the Indian Ocean and the Indian summer monsoon (ISM) and their respective influence over the Indo-Western North Pacific (WNP) region are examined in the absence of El Niño Southern Oscillation (ENSO) in two partially decoupled global experiments. ENSO is removed by nudging the tropical Pacific simulated sea surface temperature (SST) toward SST climatology from either observations or a fully coupled control run. The control reasonably captures the observed relationships between ENSO, ISM and the Indian Ocean Dipole (IOD). Despite weaker amplitude, IODs do exist in the absence of ENSO and are triggered by a boreal spring ocean–atmosphere coupled mode over the South-East Indian Ocean similar to that found in the presence of ENSO...
- Ocean–atmosphere coupled processes in the tropical Indian Ocean region prior to Indian summer monsoon onset over Keralahe present study examines atmosphere–ocean interaction before MOK using various observational data sets during the last 35 years (1982–2016). The analyses suggest a new mechanism for the evolution of MOK involving the coupling of radiation, sea surface temperature (SST), wind, evaporation, SST gradient, wind stress, total precipitable water (TPW), and convection processes. During the pre-monsoon period, Arabian Sea (ArS) starts warming and reaches a maximum just four pentads before MOK. Hence, a meridional SST gradient develops that pulls air from the colder southern Indian Ocean, which leads to enhanced wind speed and thus wind stress towards the warmer region...
Indian Ocean
- Films on Demand This link opens in a new windowThe scientific team aboard the “Golden Shadow” visits the Chagos Archipelago, a tropical paradise with some of the healthiest coral reefs on the planet. They come to study reefs seemingly untouched by man, but instead become witnesses to a bleaching incident that transforms the reefs right before their eyes. Before they leave, they also discover rays of hope in little sprigs of coral that fight on.