“…They play crucial roles in the mid-to long-distance water mass exchange, material and energy transport, and vertical dynamic enhancement (Liu and Tang, 2018;Chen et al, 2023b). As one of the most complex regions in the ocean circulation system, the Northwest Pacific Ocean has a significant number of mesoscale eddies, exerting profound impacts on the distribution of temperature, salinity, and chlorophyll (Xu et al, 2016;Dong et al, 2017;Sun et al, 2022;Yuan and Hu, 2023). For instance, mesoscale eddies induce heat flux anomalies at the sea surface, weakening the upper ocean thermal structure in the Kuroshio Extension region, resulting in a notable decrease in the sea surface temperature (SST) and corresponding reductions in vertical heat transfer (Yang et al, 2018;Shan et al, 2020).…”