Water is an important part of life, in fact, it’s an absolute necessity for every living thing. Our earth has abundant of water on it roughly 71 % of the earth is covered with water and approximately 97 % of this water is in oceans. We, humans, have divided one global ocean into five different oceans for our geographical and other needs. Historically there were four oceans but now we have five with the inclusion of Southern Ocean.
Five oceans of our earth are:-
1- Pacific Ocean
2- Atlantic Ocean
3- Indian Ocean
4- Southern Ocean
5- Arctic Ocean
Pacific is the largest and deepest ocean of the earth. It spans over 63,780,000 sq miles and at Mariana trench, it reaches a maximum-known depth of 10,994 meters. Imagine that’s about 11 km of depth and all filled with water. Approximately Pacific cover about 46% of earth water and one-third of its total area. Total land area of earth is 29 % so Pacific alone is bigger than all the land area of Earth.
Pacific is subdivided to the north Pacific Ocean and south pacific ocean with reference to earth equatorial line that passes from the Pacific.
Atlantic is the second largest ocean in the world. It spans over 41,080,000 sq miles and its maximum measured depth is 8604 meters at Puerto Rico Trench. Atlantic ocean is also divided by Equatorial line into the south Atlantic ocean and north Atlantic ocean.
Many interesting and mysterious things are found in the Atlantic Ocean. One of the Atlantic oceans mystery is the Bermuda Triangle, which is believed to be responsible for many mysterious disappearances of aeroplanes and ships. Bermuda Triangle is also known as the Devil’s Triangle, and it is located in the western part of the North Atlantic Ocean.
Indian is the third largest ocean in the world. It spans over 27,240,000 sq miles and approximately covers 20% of earth total surface water. Maximum known depth of the Indian Ocean is 7724 meters at Java Trench while its average depth is 3,963 meters.
This Ocean is the warmest ocean of all. Due to its high-temperature plankton and other species do not grow in abundance here thus limiting marine life.
The Southern Ocean is also called Antartic or Austral Ocean. It’s the fourth largest ocean of the world spanning over 7,848,000 sq miles. The deepest point of Southern Ocean is 7,236 m at the southern end of the South Sandwich Trench. While its average depth is 4500 meters approx.
As the Southern Ocean is at the south pole of the earth. It is home to massive icebergs and the most powerful winds flow here. These extreme conditions make ship traveling very difficult.
The Arctic Ocean is smallest and shallowest of all. It spans over 5,400,000 sq miles and its max measured depth is 5450 meters at Eurasia Basin.Arctic Ocean is located at the north pole of earth although it is recognized by The International Hydrographic Organization (IHO) as an ocean, some oceanographers call it the Arctic Mediterranean Sea, classifying it an estuary of the Atlantic Ocean. Its salinity is the lowest of all other oceans, due to low evaporation, heavy freshwater inflow from rivers and streams, and limited connection and outflow to surrounding oceanic waters with higher salinities.