Mean sea levels are affected by climate change
and other factors and change over time. For this and other reasons, recorded measurements of elevation above sea level at a reference time in history might differ from the actual elevation of a given location over sea level at a given moment.
Metres above sea level is the standard measurement of the elevation or altitude of:
How it is determined
The elevation or altitude in metres above sea level of a location, object, or point can be determined in a number of ways. The most common include:
Accurate measurement of historical mean sea levels is complex. Land mass subsidence
(as occurs naturally in some regions) can give the appearance of rising sea levels
. Conversely, markings on land masses that are uplifted due to geological processes can suggest a lowering of mean sea level.
Other measurement units
above sea level is the most common analogue for metres above sea level in the US customary measurement system, abbreviated FAMSL.
Often, just the abbreviation MSL is used, e.g. Mount Everest (8848 m MSL), or the reference height is omitted completely, e.g. Mount Everest (8848 m).
Metres above mean sea level is commonly[by whom?]
abbreviated mamsl or MAMSL, based on the abbreviation AMSL for "above mean sea level".
Other abbreviations are m.a.s.l.
and MASL for "metres above sea level".
^ Ricardo Bressani, Ricardo; Carlos Chon (1996). "Effects of altitude above sea level on the cooking time and nutritional value of common beans". Plant Foods for Human Nutrition
(1): 53–61. doi
. PMID 9139304
Last edited on 15 January 2021, at 11:59
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