Short Essay On Sea Level

Sea Level Maintenance

Sea is the salty-water that covers about three-quarters of Earth's surface. A large area of salty water that is a part of ocean or surrounded by land.

Sea Level: The level of the surface of the water bodies (oceans or sea) with respect to the land. The mean level is taken between low and high tides that are used as standards to measure depths or heights.

There are 7 oceans in the world namely Atlantic Ocean(North and South), Arctic Ocean, Southern Ocean, Indian Ocean and Pacific Ocean ( North and South). They are divided into seas according to regions (about 137 seas).

History of Sea Level Rise:

The last 140,000 year:

During glacial interglacial cycles the sea level varied by over 100 meters as the ice sheets/ glaciers became strong and

As the ice melted, starting around 20 000 years ago, sea level rose rapidly at average rates of about 10 mm per year (1 m per century), and with peak rates of the order of 40 mm per year (4 m per century), until about 6000 years ago.

The Last Few Thousand Years: The rise in the sea level was much more slowly over the past 7,000 years. The sea level 2,000 years ago can be observes by) inspecting fish tanks that were built by ancient Romans. The tanks had to be at sea level for the porous gates to work and then we can estimate sea level during the their use. By comparing this level with the historical records tells us that there a was little net change in sea level from 2000 years ago till the beginning of 19th century.

Last few hundred years

The changes in sea level taken from sediment cores taken from salty marshes show an increase in the rate of sea level rise in the Atlantic Ocean during the 19th century and early 20th century, along with the few records from Europe and North