英语词汇“mean sea level”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	mean sea level
释义	mean sea level mean sea level n. The average level of the ocean's surface, calculated as the arithmetical mean of hourly tide levels taken over an extended period and used as the standard for determining terrestrial and atmospheric elevations and ocean depths. mean sea level n (Surveying) (in the UK) the sea level used by the Ordnance Survey as a datum level, determined at Newlyn in Cornwall. See sea level mean sea level The average height of the surface of the sea for all stages of the tide; used as a reference for elevations. Also called MSL. mean sea level mean sea level [′mēn ′sē ‚lev·əl] (oceanography) The average sea surface level for all stages of the tide over a 19-year period, usually determined from hourly height readings from a fixed reference level. mean sea level The average height of the surface of the sea for all stages of the tide. It is used as a reference for elevations. Usually, it is determined by averaging the height readings observed hourly over a minimum period of nineteen years. Also called sea-level datum. AcronymsSeemeaslesThesaurusSeesea level
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