高风险沿海城市和地区被列为海平面上升的特别脆弱地带

自然-气候变化,2023年3月2日

这项研究测量了当地海平面的自然变化,发现未来海平面上升的热点将出现在西太平洋热带群岛、西印度洋和东南亚的六个主要大城市:钦奈、加尔各答、仰光、曼谷、胡志明市和马尼拉。研究人员预测,在高排放情景下,这些地区到本世纪末将面临特别重大的风险。日常天气、十年一遇的气候模式以及厄尔尼诺等反复出现的事件都对某些海岸线易受海平面上升影响的程度起着重要作用。这三个因素加在一起,可能会使某些地方的海平面上升幅度比单纯气候变化造成的海平面上升幅度高出 30%,从而增加极端洪水的风险,并威胁到这些脆弱地区的数百万人。例如,到 2100 年,马尼拉沿海洪水的发生频率可能会比单纯的气候变化高出 18 倍,但在这些区域因素的综合影响下,洪水发生频率将增加 96 倍。气候变化的破坏性和不成比例的影响凸显了支持沿海地区制定适应战略的重要性,特别是减少排放以限制海平面上升,使其保持在适应范围之内。.

https://www.nature.com/articles/s41558-023-01603-w

帕姆·皮尔森

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