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Example research essay topic: Indian Ocean Persian Gulf - 1,180 words

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Indian Ocean The Indian Ocean is the third largest body of water in the world, covering about 20 % of the Earths water surface. It is bounded on the north by southern Asia; on the west by the Arabian Peninsula and Africa; on the east by the Malay Peninsula, the Sunda Islands, and Australia; and on the south by Antarctica. It is separated from the Atlantic Ocean by the 20 deg east meridian south of Africa, and from the Pacific by the 147 deg east meridian. The northernmost extent of the Indian Ocean is approximately 30 deg north latitude in the Persian Gulf.

The ocean is nearly 10, 000 km (6, 200 mi) wide at the southern tips of Africa and Australia; its area is 73, 556, 000 sq km (28, 400, 000 sq mi), including the RED SEA and the PERSIAN GULF. The oceans volume is estimated to be 292, 131, 000 km (3) (70, 086, 000 mi (3) ). Small islands dot the continental rims. Island nations within the ocean are Madagascar (formerly Malagasy Republic), the worlds fourth largest island; Comoros; Seychelles; Maldives; Mauritius; and Sri Lanka. Indonesia borders it.

The oceans importance as a transit route between Asia and Africa has made it a scene of conflict. Because of its size, however, no one nation had successfully dominated until the early 1800 s when Britain controlled much of the surrounding land. Its strategic importance far outweighs the economic value of its minerals or marine life. ENVIRONMENT The African, Indian, and Antarctic crustal plates converge in the Indian Ocean. Their junctures are marked by branches of the MID-OCEANIC RIDGE forming an inverted Y, with the stem running south from the edge of the continental shelf near Bombay, India. The eastern, western, and southern basins thus formed are subdivided into smaller basins by ridges.

The oceans continental shelves are narrow, averaging 200 km (125 mi) in width. An exception is found off Australias western coast, where the shelf width exceeds 1, 000 km (600 mi). The average depth of the ocean is 3, 890 m (12, 760 ft). Its deepest point, in the Java Trench, is estimated to be 7, 450 m (24, 442 ft). North of 50 deg south latitude, 86 % of the main basin is covered by pelagic sediments, of which more than one-half is globigerina ooze.

The remaining 14 % is layered with terrigenous sediments. Glacial outwash dominates the extreme southern latitudes. Climate The climate north of the equator is affected by a MONSOON wind system. Strong northeast winds blow from October until April; from May until October south and west winds prevail. In the ARABIAN SEA the violent monsoon brings rain to the Indian subcontinent. In the southern hemisphere the winds generally are milder, but summer storms near Mauritius can be severe.

When the monsoon winds change, cyclones sometimes strike the shores of the Arabian Sea and the Bay of Bengal. Hydrology Among the few large rivers flowing into the Indian Ocean are the Zambezi, Shatt-al-Arab, Indus, Ganges, Brahmaputra, and Irrawaddy. Currents are largely controlled by the monsoon. Two large circular currents, one in the northern hemisphere flowing clockwise and one south of the equator moving counterclockwise, constitute the dominant flow pattern. During the winter monsoon, however, currents in the north are reversed. Deepwater circulation is controlled primarily by inflows from the Atlantic Ocean, the Red Sea, and Antarctic currents.

North of 20 deg south latitude the minimum surface temperature is 22 deg C (72 deg F), exceeding 28 deg C (82 deg F) to the east. Southward of 40 deg south latitude, temperatures drop quickly. Surface water salinity ranges from 32 to 37 parts per 1, 000, the highest occurring in the Arabian Sea and in a belt between southern Africa and southwestern Australia. Pack ice and icebergs are found throughout the year south of about 65 deg south latitude. The average northern limit of icebergs is 45 deg south latitude. Economy The warmth of the Indian Ocean keeps phytoplankton production low, except along the northern fringes and in a few scattered spots elsewhere; life in the ocean is thus limited.

Fishing is confined to subsistence levels. The oceans most important function has been that of trade transport. Europeans, following the ancient seafarers, had crossed its waters to reach the East and returned with silks, rugs, tea, and spices. The Indian Ocean is also noted for its role in the shipment of petroleum from Southeast Asia to the West. Petroleum is the most significant mineral of the area, extracted primarily on the Persian Gulf. HISTORY The earliest known civilizations, in the valleys of the Nile, Euphrates, Tigris, and Indus rivers and in Southeast Asia, have developed near the Indian Ocean.

During Egypt's 1 st dynasty (c. 3000 BC), sailors were sent out onto its waters, journeying to Punt, thought to be part of present-day Somalia. Returning ships brought gold and slaves. Phoenicians of the 3 d millennium BC may have entered the area, but no settlements resulted. Marco POLO (c. 1254 - 1324) is thought to have returned from the Far East by way of the Strait of Malacca.

Vasco da GAMA rounded the Cape of Good Hope in 1497 and sailed to India, the first European to do so. The ancient peoples who lived along the ocean each tried unsuccessfully to control its commercial routes. Portugal attempted to achieve preeminence for more than a century but was thwarted in the mid- 1600 s. The Dutch East India Company (1602 - 1798) sought control of trade with the East across the Indian Ocean. France and Britain established trade companies for the area, but Britain became the principal power.

After 1815 it dominated the area. The opening of the SUEZ CANAL in 1869 revived European interest in the East, but no nation was successful in establishing trade dominance. Since World War II the United Kingdom has withdrawn from the area, to be only partially replaced by India, the USSR, and the United States. The last two have tried to establish hegemony by negotiating for naval base sites. Developing countries bordering the ocean, however, seek to have it made a zone of peace so that they may use its shipping lanes freely. Bibliography: Braun, D. , The Indian Ocean (1983); Chandra, S. , ed. , The Indian Ocean (1987); Chaudhuri, K.

N. , Trade and Civilization in the Indian Ocean (1985); Cousteau, Jacques-Yves, and Done, Philippe, Life and Death in a Coral Sea (1971); Cubits, Gerald, Islands of the Indian Ocean (1975); Das Gupta, A. , and Pearson, M. N. , India and the Indian Ocean (1987); Dowdy, W. L. , and Too, R. , eds. , The Indian Ocean (1985); Kerr, A. , ed. , Resources and Development in the Indian Ocean Region (1981); Nairn, A. E. , and Steel, F. G. , eds. , The Ocean Basins and Margins, Vol. 6: The Indian Ocean (1982); Ostheimer, John M. , ed. , The Politics of the Western Indian Ocean Islands (1975); Toussaint, Auguste, The History of the Indian Ocean, trans.

by June Guicharnaud (1966).


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Research essay sample on Indian Ocean Persian Gulf

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