(from the article `sea level`) ...with the changes in tides, atmospheric pressure, and wind conditions. Longer-term changes in sea level are influenced by the Earth`s changing ... ...and of the sea are contours. Such lines were little used until the mid-19th century, mainly because surveys had not generally been made in ... [2 relate...
Found on
http://www.britannica.com/eb/a-z/m/60
<marine biology> A tidal datum: the arithmetic mean of hourly water elevations observed over a specific 19-year cycle. Points on land can be referenced to a mean sea level, in which case the datum assumes zero elevation. ... (09 Oct 1997) ...
Found on
http://www.encyclo.co.uk/local/20973
The average height of the ocean surface as determined from the mean of all tidal levels recorded at hourly intervals.
Found on
http://www.physicalgeography.net/physgeoglos/m.html
The average height of the surface of the sea for all stages of the tide over a 19-year period, usually determined from hourly height readings (see sea level datums).
Found on
https://www.encyclo.co.uk/local/20127
The average height of the sea surface, based upon hourly observation of the tide height on the open coast or in adjacent waters that have free access to the sea. In the United States, it is defined as the average height of the sea surface for all stages of the tide over a nineteen year period. Mean sea level, commonly abbreviated as MSL and referre...
Found on
https://www.encyclo.co.uk/local/20128
No exact match found.
