advertisement
Reference Terms
from Wikipedia, the free encyclopedia

Sea level

Mean sea level (MSL) is the average (mean) height of the sea, with reference to a suitable reference surface.

Defining the reference level, however, involves complex measurement, and accurately determining MSL can prove difficult.

Sea level has changed over geologic time.

During the most recent ice age (at its maximum about 20,000 years ago) the world's sea level was about 130 m lower than today, due to the large amount of sea water that had evaporated and been deposited as snow and ice in northern hemisphere glaciers.

Note:   The above text is excerpted from the Wikipedia article "Sea level", which has been released under the GNU Free Documentation License.
Related Stories
 


Earth & Climate News
September 27, 2020

New research identifies a process that might have been key in producing the first organic molecules on Earth about 4 billion years ago, before the origin of life. The ...
A new study of an ancient period that is considered the closest natural analog to the era of modern human carbon emissions ...
Astronomers have discovered a rare molecule -- phosphine -- in the clouds of Venus. On Earth, this gas is only made industrially or by microbes that thrive in oxygen-free ...
Scientists have compiled a continuous, high-fidelity record of variations in Earth's climate extending 66 million years into ...
Latest Headlines
updated 12:56 pm ET