2026-10-12T09:46:40Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34029325 2026-09-30T03:59:17Z category_21 category_24 category_272 category_39 category_502 category_734 portal_87 item_type_6 month_year_09_2026

Satellite‑observed recent flow acceleration of glaciers and model‑based environmental associations in Victoria Land, East Antarctica Shangshang Xu (25141180) Yulong Kang (10292327) Qinou Liang (25141183) Zhenfeng Wang (1721518) Xiebing Yin (25141186) Yanpeng Yang (6758957) Peining Shu (25141189) Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Ecology Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified East Antarctica Victoria Land Sentinel-1 SAR glacier velocity environmental variables <p>Antarctic ice mass loss has intensified in recent decades. However, short-term glacier velocity variability in Victoria Land, East Antarctica, remains poorly documented. This study used Sentinel-1 SLC data and environmental records from 2017 to 2025 to quantify glacier-velocity variability in Victoria Land and examine its model-based statistical associations with selected atmospheric and oceanic variables using XGBoost–SHAP. The results show positive multi-year acceleration trends over the 2017–2025 observational period, superimposed on pronounced seasonal variability. The six selected glacier systems showed positive acceleration rates: Barnett Glacier (2.06 ± 0.92% a⁻¹), Borchgrevink Glacier (2.39 ± 0.66% a⁻¹), David Glacier–Drygalski Ice Tongue system (1.68 ± 0.23% a⁻¹), Larsen Glacier (3.78 ± 0.69% a⁻¹), McMahon Glacier (2.91 ± 0.73% a⁻¹), and Oakley Glacier (2.54 ± 0.33% a⁻¹). Spatially resolved velocity maps, centerline profiles, and terminus-region records revealed substantial differences in flow magnitude and variability among glaciers. Among the five environmental predictors examined, upper-ocean temperature had the largest overall model contribution, followed by near-surface air temperature, surface skin temperature, upper-ocean current speed, and runoff. This study provides a Sentinel-1-based record of recent glacier-velocity variability in Victoria Land and illustrates the utility of repeated, high-temporal-resolution SAR observations for characterizing glacier-flow variability in East Antarctica.</p> 2026-09-30T03:59:17Z Text Journal contribution 10.6084/m9.figshare.34029325.v1 https://figshare.com/articles/journal_contribution/Satellite_observed_recent_flow_acceleration_of_glaciers_and_model_based_environmental_associations_in_Victoria_Land_East_Antarctica/34029325 CC BY 4.0