Northern Pacific extratropical cyclone variability and its linkage with Arctic sea ice changes

Abstract Extratropical cyclones are critical weather systems affecting climate change in mid and high-latitude regions. Researching the characteristics, patterns, movements of extratropical is helpful for improved prediction understanding global change. Currently, there still great difficulties predicting cyclones. Also, few prior studies have investigated potential impact Arctic sea ice on cyclone activity (ECA). This study utilizes updated ERA5 data an ECA identification method to reveal Pacific. The results demonstrate that Pacific primarily occurs during cold season (November March), North region has maximum ECA. More remarkably, a strong linkage exists between preceding summer-fall anomalous changes We discover could modify local pressure field, changing southern boundary sector polar vortex winter, which turn influences intensity westerly jet stream eventually impacts season. Our exploration will provide references further Ocean.