海かい面めん更こう正せい

Meanings

1

reduction to mean sea level; sea-level pressure correction

Meteorological term for adjusting atmospheric pressure readings to mean sea level for standardization.

気き象しょう観かん測そくでは、観かん測そく所じょの気き圧あつを海かい面めん更こう正せいして比ひ較かくする。
In meteorological observation, the station pressure is reduced to mean sea level for comparison.

Kanji

海sea, ocean
面mask, face, features
更grow late, night watch, sit up late
正correct, justice, righteous
校exam, school, printing

Related words

気き圧あつ
気圧 is general atmospheric pressure, while 海面更正 is the specific process of adjusting it to sea level.
海かい面めん気き圧あつ
海面気圧 is the resulting sea-level pressure value, whereas 海面更正 is the correction procedure itself.

Built from

海かい面めん+更こう正せい

Written forms

海かい面めん更こう正せい
Standard technical spelling for meteorological pressure reduction to mean sea level.
海かい面めん校こう正せい
Alternate kanji form using 校正 (calibration/correction); less common than 更正.

Etymology

Compound of 海面 (sea surface) and 更正 (correction/revision), referring to the meteorological practice of adjusting pressure readings to mean sea level.