Spatiotemporal analysis of sea ice in the Weddell Sea of Antarctic based on GTWR

作者：Yi Ding, Xin Liu, Xiaofeng Dai, Yikun Yang, Gaoying Yin, Heping Sun, J. Guo · 发表于：Scientific Reports · 年份：2025 · DOI：10.1038/s41598-025-90106-z · 被引用次数：4 · 研究领域：Arctic and Antarctic ice dynamics、Cryospheric studies and observations、Climate change and permafrost

This study investigates the spatiotemporal dynamics of Antarctic sea ice concentration (SIC) and its interactions with environmental factors from 2011 to 2023, focusing on the Weddell Sea. SIC products derived from MODIS data were assessed and compared with six widely used datasets, including AMSR2/NT2 and MWRI/NT2. Among these, MWRI/NT2 exhibited the highest consistency with MODIS-derived SIC, achieving a correlation coefficient of 0.94, the lowest bias (0.23%), and the smallest mean absolute deviation (MAD) and root mean square deviation (RMSD), making it the preferred dataset for further analysis. Seasonal trends reveal that SIC experienced the most significant decline during autumn (-10.7 ± 2.3 × 10³ km² yr⁻¹) and the smallest reduction in winter (-1.3 ± 0.5 × 10³ km² yr⁻¹). Correlation analysis identified sea surface temperature (SST), wind speed, and latent heat flux (LHF) as the primary drivers of seasonal SIC variability, with SST exhibiting strong negative correlations across all seasons (r = -0.81, p < 0.01). Spatially, SIC in the Weddell Sea displayed significant heterogeneity in its relationship with environmental factors. SST demonstrated a negative correlation with SIC, particularly in the western Weddell Sea, with lags of -3 to -5 months. LHF consistently promoted sea ice growth, with the strongest influence along the eastern Weddell Sea coast. Zonal and meridional winds exhibited both promoting and suppressing effects on SIC depending on the region and time pe...