New Model Predicts Nearly 2-Meter Sea Level Rise Threatening Coastal Cities Worldwide
A recent study led by Dr. Benjamin Grandi from Nanyang Technological University in Singapore, in collaboration with researchers from NTU and Delft University, forecasts a global sea level rise of approximately 1.9 meters by 2100 under high emission scenarios. Published in the journal Earth’s Future, this projection nearly doubles the current maximum estimate by the United Nations and signals severe risks to coastal real estate, national infrastructure, and entire communities worldwide.
The research team developed an integrated statistical model combining physical ice sheet data with expert consensus to address limitations in traditional sea level rise predictions. Their model estimates a probabilistic range of 0.5 to 1.9 meters (1.6 to 6.2 feet) rise by century’s end, significantly exceeding the Intergovernmental Panel on Climate Change’s (IPCC) upper limit of 1 meter (3.3 feet). The study highlights that local factors such as land subsidence, ocean currents, and Earth's gravitational changes will cause uneven impacts globally.
Beyond direct flooding, the rising sea levels will increase the frequency and severity of storm surges, accelerate saltwater intrusion into freshwater aquifers and agricultural lands, and destroy critical coastal wetlands. These extreme conditions may force managed retreat policies, requiring systematic evacuation of low-lying coastal populations.
Israel, with most of its population and vital infrastructure concentrated along its narrow coastal plain, faces significant threats from these developments. The new findings urge Israeli planning authorities to expedite engineering defenses and marine spatial protections against imminent climate hazards.
Historically, discrepancies among climate models complicated long-term risk assessments for local governments and engineers. This new integrated approach aims to provide decision-makers with more accurate extreme scenario forecasts to guide flood defenses, storm barriers, and land use regulations, thereby preventing future humanitarian and economic disasters.
