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Geography Notes: Oceans of the World

Geography Notes: Oceans of the World

Here is Study Notes on “Short Notes on All the Important oceans of the world”. Read this article and improve your GK for SSC CGL, MTS, CPO, CHSL, RAILWAY etc.

Important Points on oceans and seas:

❖ About 70% of the world is covered by water, and 97% of this water lies in the oceans and seas.

❖ The oceans have a major effect upon the weather, and they moderate the world’s climate.

❖ For example, water absorbs the Sun’s heat near the equator and surface currents distribute it around the earth warming the air and nearby landmasses in winter and cooling them in summer.

❖ Deep water circulation also helps distribute heat globally.

❖ Oceans and seas supply most of the water that evaporates and then falls as rain in the water cycle.

❖ They are salty while rivers and lakes are fresh water.

❖ When salty water from the ocean mixes with fresh water, a special place called an estuary is formed.

❖ There are four major oceans, the Pacific, Atlantic, Indian and Arctic (listed in decreasing order of size).

1. Pacific Ocean

  • The Pacific Ocean is the largest and covers a third part of the Earth.
  • The Pacific is the largest of these oceans, covering 63,784,077 sq miles (165,200,000 km²).
  • There are few major rivers flowing into the Pacific Ocean because it is surrounded by mountain ranges.

2. Atlantic Ocean

  • The Atlantic is the second largest ocean and many large rivers flow into the Atlantic carrying sediment from land.
  • Its Area is 106,400,000 km². It includes the Mediterranean, Caribbean and Baltic Seas, and the Gulf of Mexico.

3. Indian Ocean

  • The Indian Ocean is the third largest ocean, covering about 20% of the Earth’s water surface.
  • The greatest depth is Milwaukee Deep near Puerto Rico, where the Ocean is 8,380 metres deep.

4. Arctic Ocean

  • The Arctic Ocean is the smallest ocean and it is located entirely in the North Polar Region.
  • The Arctic is the smallest and shallowest of the five Oceans and falls mostly within the Arctic Circle.
  • The Arctic Ocean is the ocean around the North Pole.
  • The most northern parts of Eurasia and North America are around the Arctic Ocean.
  • The ocean’s area is about 14.056 million km2, which is the smallest of the world’s 5 oceans, and it has 45,389 kilometres of coastline.
  • The average depth of the Arctic Ocean is 1,038 metres.
  • The deepest point is in the Eurasian Basin, at 5,450 m.
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