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Essay on Sea | Paragraph on Sea

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Sea is a large body of saltwater surrounded in whole or in parts by land. Sea is the interconnected system of Earth’s salty oceanic waters, considered as on global ocean or as several principle oceanic divisions.

Seas and oceans occupy most of the Earth’s surfaces and it plays a very important role to support life. Sea moderates Earth’s climate and has important roles in the water cycle, carbon cycle and nitrogen cycle.

Our Earth is basically covered with seas and oceans at its Southern Hemisphere. The Northern Hemisphere have almost comparable portion of land and water.

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There is a difference of temperature and salinity at different portions of the sea such as at different depths and different areas. This differences produces deep sea currents. Also surface currents are formed by friction of waves produced by the wind and by tides, changes in the local sea level produced by gravity of The Moon and the Sun.

Sea is a storehouse of treasure in the form of uncountable life forms of which a lot more are yet to be discovered. Also it is a storehouse of minerals. Sea is a very mysterious place and due to its vast nature it always drives human beings curious about it.

The nature of sea is different at different places because of various geographical features surrounding it. At some places the salinity is so high that human beings do not drown in that sea. And of course no living thing can survive. The seas and oceans are the reservoir of the most important ingredient in our food. I.e. Salt.

The sea provides livelihood to many fishermen and villages on the seashore. The sea is home to a lot of life forms of which some are very important for humans because of its high demand and nutrition. For example fishes, shellfish, mammals and seaweed. These are both harvested from wild and farmed.

The sea contains some form of life or the other at every part. Of course the sunlit areas are very less in deep sea. Also the penetration of light is effected by turbidity of water, surface tides, etc. So the sea vegetation is adapted to photosynthesis at minimal light available to them. The same goes to some fishes and other marine animal. The oxygen is also very scarce in deep seawater.

Essential aspect of human life such as trade, culture, travel, power generation and mineral extraction are provided by the sea. Sea is important during warfare too.

Sea imposes many weather conditions on the earth such as hurricanes, typhoons, cyclones, tsunami, earthquake, volcano, etc. mainly at lands which are in direct contact with the sea. These areas are very vulnerable to earthquakes especially if the epicenter is in the middle of the sea. Same goes for winds and storms.

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However there are various ways in which sea, oceans and the marine life are threatened by man made reasons. Earlier killing of whales was not done judiciously. The fish oil is used for many purposes. This had led to lessening in the number of the whale fish. So now it is not legal to kill whales above a certain limit. The sea is exploited a lot for mineral extraction too. This again seems to exhaust the resources available. So now boundaries have been given to the major countries who are dependent on the sea for resources in the form of few hundred nautical miles counted from their land. Exploiting resources beyond that limit is illegal. Before the imposing of these laws overfishing was also a problem but not now.

Then, releasing of industrial sewages and waste products containing harmful chemicals also effects the marine life available.

Global warming have also effected marine life by increasing the temperature of the seawater and oceans. This increase however small have resulted in lowering of availability of dissolved oxygen. And so the marine animals are affected by it very much.

The sea finds a special mentioning in our tradition and folk tales too. The tales of pirates, traders losing their treasure somewhere at the middle of the ocean or sea is common. Even in our religious Scriptures or epics, there is special mentioning of sea.

So overall we can say that seas and oceans have a lot of secrets still not unveiled properly by humans. It will continue to amuse humans as he will try to reveal those secrets one by one.

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About the author

Charmin Patel

Blogger and Digital Marketer by Choice and Chemical Engineer By Chance. Computer and Internet Geek Person Who Loves To Do Something New Every Day.


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