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sea level
noun
- the horizontal plane or level corresponding to the surface of the sea at mean level between high and low tide.
sea level
noun
- the level of the surface of the sea with respect to the land, taken to be the mean level between high and low tide, and used as a standard base for measuring heights and depths
sea level
- The level of the ocean's surface. Sea level at a particular location changes regularly with the tides and irregularly due to conditions such as wind and currents. Other factors that contribute to such fluctuation include water temperature and salinity, air pressure, seasonal changes, the amount of stream runoff, and the amount of water that is stored as ice or snow.
- ◆ The reference point used as a standard for determining terrestrial and atmospheric elevation or ocean depths is called the mean sea level and is calculated as the average of hourly tide levels measured by mechanical tide gauges over extended periods of time.
Word History and Origins
Origin of sea level1
Example Sentences
Along with others in the mining industry, he disputes the environmental claims made and has argued that the abyssal zone - 3,000m to 6,000m below sea level - has very low concentrations of life.
But if ice shelves are lost, the glaciers behind can speed up, depositing more and more ice into the ocean and raising sea levels worldwide.
Millions of people all over the world have felt the impacts of climate change in the form of natural disasters, rising sea levels and heat waves that impact their health or food sources.
Species are dying off, sea levels are rising and extreme weather events are occurring more frequently.
Formerly known as the Ellice Islands, all are low-lying, with no point on Tuvalu being higher than 4.5m above sea level.
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