Global probabilistic projections of extreme sea levels show intensification of coastal flood hazard.

Global probabilistic projections of extreme sea levels show intensification of coastal flood hazard.
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DOI:
10.1038/s41467-018-04692-w
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发表时间:
2018-06-18
影响因子:
16.6
通讯作者:
Feyen L
Feyen L
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Vousdoukas MI;Mentaschi L;Voukouvalas E;Verlaan M;Jevrejeva S;Jackson LP;Feyen L

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全球变暖预计将导致全球海岸线极端海平面上升和洪水风险增加。在这项工作中,考虑到平均海平面、潮汐、风浪和风暴潮的变化,我们提出了本世纪esl的概率预测。我们预计,在2000年至2100年期间,在适度减排政策情景下,全球100年平均ESL极有可能增加34-76厘米,在一切照旧情景下,很可能增加58-172厘米。esl的上升主要是由热膨胀驱动的,其次是冰川和格陵兰岛和南极洲冰盖的冰质量损失。在这些情景下,ESL的上升将使大部分热带地区从2050年开始每年暴露在现在的100年一次的事件中。到本世纪末,世界上大多数海岸线都会出现这种情况,除非及时采取适应措施,否则洪水风险将达到前所未有的水平。极端的海平面给世界海岸线带来了洪水风险。在这里,作者进行了极端海平面的概率预测,并表明本世纪沿全球大部分海岸线的沿海洪水灾害将显著增加。
Global warming is expected to drive increasing extreme sea levels (ESLs) and flood risk along the world’s coastlines. In this work we present probabilistic projections of ESLs for the present century taking into consideration changes in mean sea level, tides, wind-waves, and storm surges. Between the year 2000 and 2100 we project a very likely increase of the global average 100-year ESL of 34–76 cm under a moderate-emission-mitigation-policy scenario and of 58–172 cm under a business as usual scenario. Rising ESLs are mostly driven by thermal expansion, followed by contributions from ice mass-loss from glaciers, and ice-sheets in Greenland and Antarctica. Under these scenarios ESL rise would render a large part of the tropics exposed annually to the present-day 100-year event from 2050. By the end of this century this applies to most coastlines around the world, implying unprecedented flood risk levels unless timely adaptation measures are taken. Extreme sea levels are a flood risk along the world’s coastlines. Here the authors carry out probabilistic projections of extreme sea levels and show that for the present century coastal flood hazards will increase significantly along most of the global coastlines.
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