A new study reveals that current sea levels at coasts are systematically underestimated, being on average over twenty centimeters higher than previously thought, with significant implications for potential flooding risks.
A research team published in the journal Nature claims that current sea level measurements along coastlines are significantly lower than reality, with an average discrepancy of over twenty centimeters, depending on the model used. In some regions, this difference could even reach several meters. This underestimation poses serious concerns for future flooding as areas projected to be submerged due to rising sea levels are not accurately represented in existing data.
The study highlights that with projected sea level rises of one meter, up to a third more land area could fall below sea level compared to prior estimates. This is particularly alarming as the population at risk could increase by 48 to 68 percent, affecting millions of people worldwide. The research team, led by Katharina Seeger and Philip Minderhoud from Wageningen University & Research, calls for a reevaluation of existing models used in sea level assessments to better understand the implications of climate change.
The authors attribute the discrepancies primarily to weaknesses in the modeling methods of approximately 90 percent of the 385 studies analyzed, which date from 2009 to 2025. As climate change continues to influence sea levels globally, scientists stress the urgent need for improved research methods to develop accurate predictions and prepare for potential disasters related to flooding.
