海水面(かいすいめん) かいすいめん noun sea level; sea surface naturescience 1. sea level; sea surface The level of the ocean's surface, used as a reference point for measuring altitude and depth. Also refers to the physical surface of the sea. 海水面(かいすいめん)が上昇(じょうしょう)している。🔊 Sea levels are rising. この地域(ちいき)は海水面(かいすいめん)より低(ひく)い。🔊 This area is below sea level. 地球(ちきゅう)温暖化(おんだんか)による海水面(かいすいめん)の上昇(じょうしょう)は、島国(しまぐに)にとって深刻(しんこく)な問題(もんだい)だ。🔊 The rise in sea levels due to global warming is a serious problem for island nations. A compound of 海水(かいすい) (seawater) and 面(めん) (surface). Frequently used in environmental science, geography, and news about climate change.Common collocations海水面(かいすいめん)の上昇(じょうしょう): sea level rise海水面(かいすいめん)より高(たか)い: above sea level海水面(かいすいめん)より低(ひく)い: below sea level海水面(かいすいめん)温度(おんど): sea surface temperatureSimilar words海面(かいめん): sea surface — a shorter, more common synonym; often used interchangeably水面(すいめん): water surface — refers to any body of water, not just the sea海抜(かいばつ): above sea level — a measurement of altitude relative to sea level (海抜(かいばつ)100メートル = 100 meters above sea level) Related Words Compare: 海面(かいめん) (sea surface) Compare: 海抜(かいばつ) (above sea level) general Added 2026.5.2 1:21 · Revised 2026.9.2 13:02 26000/26439_kaisuimen