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<p>Basal melting and calving are the main pathways for mass loss in Antarctic ice shelves. Basal channels, as detailed variations in basal melting, mutually promote basal melting and calving, thereby weakening the stability of ice shelves. Therefore, it is necessary to calculate and statistically analyze basal melting, basal channels, and calving events across all Antarctic ice shelves and examine the correlation among these three factors. This study utilizes various data sources to calculate the Basal Channel Density (BCD) and average basal melt rate of all Antarctic ice shelves during 2010–2020, as well as the spatial correlation between basal melting, basal channels, and calving. We found that ice shelves along the Amundsen Sea and Bellingshausen Sea have higher basal melt rates and basal channel densities, while other sea areas have lower values. This is mainly influenced by seabed topography and Circumpolar Deep Water. Excluding (CDW) extreme calving events, there is a positive correlation among basal melting, basal channels, and calving in coastal ice shelves across different sea areas, with a correlation coefficient exceeding 0.67. This indicates that basal melting and basal channels are major factors causing ice shelf calving. Our results emphasize the importance of the impact of basal melting, basal channels, and calving on ice shelf stability, and they provide a significant reference for further research on ice shelf-ocean interactions.</p>

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Correlation analysis between Antarctic ice shelf calving and basal melting during 2010–2020

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Mingliang Liu,
  • Zemin Wang,
  • Baojun Zhang,
  • Hong Geng,
  • Qian Li,
  • Jiachun An

摘要

Basal melting and calving are the main pathways for mass loss in Antarctic ice shelves. Basal channels, as detailed variations in basal melting, mutually promote basal melting and calving, thereby weakening the stability of ice shelves. Therefore, it is necessary to calculate and statistically analyze basal melting, basal channels, and calving events across all Antarctic ice shelves and examine the correlation among these three factors. This study utilizes various data sources to calculate the Basal Channel Density (BCD) and average basal melt rate of all Antarctic ice shelves during 2010–2020, as well as the spatial correlation between basal melting, basal channels, and calving. We found that ice shelves along the Amundsen Sea and Bellingshausen Sea have higher basal melt rates and basal channel densities, while other sea areas have lower values. This is mainly influenced by seabed topography and Circumpolar Deep Water. Excluding (CDW) extreme calving events, there is a positive correlation among basal melting, basal channels, and calving in coastal ice shelves across different sea areas, with a correlation coefficient exceeding 0.67. This indicates that basal melting and basal channels are major factors causing ice shelf calving. Our results emphasize the importance of the impact of basal melting, basal channels, and calving on ice shelf stability, and they provide a significant reference for further research on ice shelf-ocean interactions.