资源环境科技发展态势分析平台

Given the longstanding debate on geomorphological features (i.e., megaboulders, chevron-shaped sand ridges, and runup deposits) observed around the Bahamas, it is unclear whether Earth experienced superstorms over the North Atlantic during the Last Interglacial (LIG). Based on multimodels from the Paleoclimate Modelling Intercomparison Project, we illustrate that the tropical North Atlantic exhibits an overall warming (∼0.9°C) during the storm season of the LIG relative to preindustrial. Potential intensity shows a zonal dipole anomaly over the main development region during the LIG, with positive anomalies in the west, offering an increased probability of extremely strong storms. Favorable conditions for storm formation shift from the eastern to the western main development region during the LIG, with enhanced large-scale steering flows at higher latitudes (∼15‒30°N). These results suggest a westward migration of storm activity during the LIG, with potentially more frequent and intense storms over the western North Atlantic and increased coastal erosions.