极地研究

极地研究 ›› 2025, Vol. 37 ›› Issue (4): 713-723.DOI: 10.13679/j.jdyj.20250011

• 研究论文 • 上一篇    下一篇

基于差分干涉测量短基线集时序分析技术监测东南极托滕2冰下湖动态变化

陈丽辉,刘俊,汤登晖   

  1. 上海工程技术大学城市轨道交通学院, 上海 201620
  • 收稿日期:2025-02-24 修回日期:2025-05-09 出版日期:2025-12-30 发布日期:2026-01-12
  • 通讯作者: 刘俊
  • 作者简介:作者要求2025年第4期出版/20250609吴娜
  • 基金资助:
    国家自然科学基金资助

Monitoring dynamic changes of subglacial Lake Totten2 in Southeast Antarctica using differential interferometric short baseline subset time-series analysis technique

CHEN Lihui, LIU Jun, TANG Denghui   

  1. School of Urban Rail Transit, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2025-02-24 Revised:2025-05-09 Online:2025-12-30 Published:2026-01-12

PDF (PC)

102

摘要： 托滕(Totten)冰川是东南极冰盖变薄最为剧烈的地区, 作为一个出口冰川, 其下方的托滕2(Totten2)活跃冰下湖的水文活动, 可能会在数十年的时间尺度上影响该区域冰盖物质平衡。本文利用2022年4月—2024年3月的57景Sentinel-1雷达影像, 基于差分干涉短基线集时序分析技术(SBAS-InSAR)对Totten2冰下湖表面冰盖高程变化进行监测, 以此来研究该冰下湖的动态演变过程, 并与ICESat-2 ATL11卫星测高数据的监测结果进行比较分析。结果表明: 在监测时间段内, 该冰下湖表面高程处于持续下降状态, 即该湖一直在排水; Sentinel-1和ICESat-2数据的监测结果具有较好的一致性, 证明SBAS-InSAR技术能够在小尺度时空域上监测冰下湖活动, 可以成为监测南极冰下湖活动的一种有效手段。

关键词: 雷达影像数据, SBAS-InSAR, 冰下湖, 高程变化, 水文活动

Abstract:

Totten Glacier is in the region that has undergone the most dramatic thinning in the East Antarctic ice sheet in recent years. The mass balance of this region may be affected by the hydrological activity of Totten2—an active subglacial lake in the upstream catchment of the glacier—over a time scale of several decades. This study applied the small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) to 57 Sentinel-1 radar images from April 2022 to March 2024 to monitor changes in the ice surface elevation of Totten2 at a high spatiotemporal resolution. Results were compared with ICESat-2 ATL11 data. Over the study period, ice sheet elevation decreased continuously, indicating continuous draining of the lake. Close agreement between Sentinel-1 and ICESat-2 data demonstrates that SBAS-InSAR is an effective tool for monitoring subglacial lake activity at small spatiotemporal scales and for studying the hydrological activity of Antarctic subglacial lakes.


Key words: radar image data, SBAS-InSAR, subglacial lake activity, elevation change, hydrological activities