Indian Ocean
Indian Ocean as the 1997 edition of the CIA World Factbook published it: 19 fields, one of 36 editions from 1990 to 2025.
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Geography
Body of water between Africa, Antarctica, Asia, and | Australia
14 fieldsNote
Climate
- northeast monsoon (December to April), southwest monsoon (June to October);
- tropical cyclones occur during May/June and October/November in the northern Indian Ocean and January/February in the southern Indian Ocean
Terrain
- surface dominated by counterclockwise gyre (broad, circular system of currents) in the southern Indian Ocean;
- unique reversal of surface currents in the northern Indian Ocean;
- low atmospheric pressure over southwest Asia from hot, rising, summer air results in the southwest monsoon and southwest-to-northeast winds and currents, while high pressure over northern Asia from cold, falling, winter air results in the northeast monsoon and northeast-to-southwest winds and currents;
- ocean floor is dominated by the Mid-Indian Ocean Ridge and subdivided by the Southeast Indian Ocean Ridge, Southwest Indian Ocean Ridge, and Ninety East Ridge
Natural resources
oil and gas fields, fish, shrimp, sand and gravel aggregates, placer deposits, polymetallic nodules
Natural hazards
ships subject to superstructure icing in extreme south near Antarctica from May to October
Environment - current issues
endangered marine species include the dugong, seals, turtles, and whales; oil pollution in the Arabian Sea, Persian Gulf, and Red Sea
Environment - international agreements
- party to :
- none of the selected agreements
- signed, but not ratified:
- none of the selected agreements
Geography - note
major chokepoints include Bab el Mandeb, Strait of Hormuz, Strait of Malacca, southern access to the Suez Canal, and the Lombok Strait
Government
1 fieldData code
none; the US Government has not approved a standard for hydrographic codes - see the Cross-Reference List of Hydrographic Codes appendix
Economy
The Indian Ocean provides major sea routes | connecting the Middle East, Africa, and East Asia with Europe and the | Americas.
1 fieldEconomy - overview
The Indian Ocean provides major sea routes connecting the Middle East, Africa, and East Asia with Europe and the Americas. It carries a particularly heavy traffic of petroleum and petroleum products from the oilfields of the Persian Gulf and Indonesia. Its fish are of great and growing importance to the bordering countries for domestic consumption and export.
Fishing fleets from Russia, Japan, Korea, and Taiwan also exploit the Indian Ocean, mainly for shrimp and tuna. Large reserves of hydrocarbons are being tapped in the offshore areas of Saudi Arabia, Iran, India, and western Australia. An estimated 40% of the world's offshore oil production comes from the Indian Ocean.
Beach sands rich in heavy minerals and offshore placer deposits are actively exploited by bordering countries, particularly India, South Africa, Indonesia, Sri Lanka, and Thailand.
Communications
1 fieldTelephone system
international : submarine cables from India to UAE and Malaysia and from Sri Lanka to Djibouti and Indonesia
Transportation
1 fieldPorts and harbors
Calcutta (India), Colombo (Sri Lanka), Durban (South Africa), Jakarta (Indonesia), Madras (India), Melbourne (Australia), Mumbai (Bombay; India), Richard's Bay (South Africa)
Transnational Issues
1 fieldCite this entry
Central Intelligence Agency. “Indian Ocean.” The World Factbook 1997. Archived by The Factbook, thefactbook.org/indian-ocean/1997.