This study investigates the interannual cross‐seasonal association between the winter energetic particle precipitation, which is related to the geomagnetic activity (GA), and the southern annular mode (SAM) in the following summer by employing the ERA5 reanalysis dataset. The results reveal a marked negative correlation between these variables on an interannual timescale. Therefore, we analyse the GA signatures in the southern...

A previous study found that the September–October (SO) Antarctic Oscillation (AAO) shows an out‐of‐phase variation of late January–February (JF) wet and cold weather (wet–cold) in southern China. This study explored the underlying mechanism and found that Antarctic sea ice may be responsible partially for such a relationship. The SO AAO stimulates the Antarctic sea‐ice dipole pattern (ADP) anomalies, which induce the anomalous...