Half of the world's coasts may face annual extreme sea level events by 2100
In short: Using a multi-method modeling approach, researchers projected how various levels of global warming will impact coastal hazards across more than 7,000 locations. They found that even if warming is limited to 1.5 °C, roughly 50% of these sites could see what we currently consider a 100-year extreme sea level event occurring at least once every year by the end of the century.
The study provides a global overview of how rising temperatures drive changes in extreme sea levels, noting that tropical regions appear more sensitive to these shifts than Northern high latitudes. Because these findings are based on climate modeling across different warming levels, they represent projections of future risks rather than direct observations.
Why it matters: Even the most ambitious climate mitigation targets may not prevent extreme sea level events from becoming annual occurrences for much of the world's coastlines.
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Sources
- Source: Research: Tebaldi et al. (2021). Extreme sea levels at different global warming levels. Nature Climate Change. · cc-by
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