Peng Yang ^1* Benli Guo ² Jie Yuan ¹ Honglian Xing ¹ Wenjie Yuan ¹ Yuanku Meng ²

• ¹ Shandong Provincial Geological and Mineral Exploration and Development Bureau, Ji'nan, China
• ² College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong Province, China

In light of ongoing global warming and the accelerated melting of Antarctic sea ice, this study aims to analyze the recent changes in the principal modes of Antarctic sea ice over the past decade, utilizing Empirical Orthogonal Function (EOF) and Singular Value Decomposition (SVD) techniques. The results indicate that Antarctic seaice has shifted from a growth trend of 1.7% per year in the previous decade to a melting trend in almost all regions, except the Amundsen Sea. The decline is particularly pronounced during autumn and winter, with rates of -7.1% and -6.5% per year, respectively.The Weddell Sea and West Pacific exhibit the fastest declines at -6.1% and -5.8% per year, leading to an overall average melting trend of -4.6% per year. Furthermore, the dominant mode of Antarctic sea ice has shifted from the Antarctic Dipole (ADP) pattern in the previous decade to a melting trend in the most recent period. This transition is closely linked to the increase in sea surface temperatures (SST) and surface air temperatures (SAT) in the Southern Ocean, which contribute to the pronounced ice melt observed in recent years. This research enhances our understanding of Antarctic sea ice dynamics and provides valuable insights for future studies on sea ice variability and prediction.