摘要
针对不同遥感数据源对冰川监测具有不同的优势,结合Sentinel-1归一化互相关计算方法与激光测高数据重叠点法,对恩格斯堡岛周边冰川进行冰流速和高程变化联合监测。实验结果表明恩格斯堡岛周边Priestley冰川至Nanshen冰架沿线表面流速和高程变化均呈两端大于中间趋势。该区域冰流速最大区域位于Priestley冰川纳什山脊段以及Nanshen冰架与其周边各冰川交汇区。该区域从2003~2019年平均高程变化为2.03 m,最大高程变化为5.16 m,高程变化趋势与表面流速具有较高的一致性,位于Priestley冰川纳什山脊段和Nanshen冰架与各冰川交汇口处高程变化较大,Priestley冰川凯纳特山段相对比较稳定。本文研究方式可为小区域冰川综合监测提供新思路。
In view of the different remote sensing data sources have different advantages in Glacier monitoring,combined with sentinel-1 normalized cross-correlation calculation method and laser altimetry data overlap point method,the ice velocity and elevation changes around Inexpressible Island are monitored.The experimental results show that the changes of surface velocity and elevation from Priestley glacier to Nanshen ice shelf around Inexpressible Island are larger at both ends than in the middle.The area with the largest ice velocity is located in the Nash ridge section of Priestley glacier and the intersection area of Nanshen ice shelf and its surrounding glaciers.The average elevation change of this area from 2003 to 2019 is 2.03 m,and the maximum elevation change is 5.16 m.The elevation change trend is highly consistent with the surface velocity.The elevation change is located in Nash ridge part of Priestley glacier and the confluence of Nansen ice shelf and glaciers.The Mountain Keinath part of Priestley glacier is relatively stable.The research method of elevation change monitoring in this paper can provide a new idea for small area glacier monitoring.
作者
刘沼辉
齐忠华
朱李忠
LIU Zhaohui;QI Zhonghua;ZHU Lizhong(Polar Surveying and Mapping Engineering Center of Heilongjiang Administration of Surveying,Mapping and Geoinformation,Harbin 150081,China;Key Laboratory of polar Surveying and Mapping,Ministry of Natural Resources of the Peapie's Republic of China,Harbin 150081,China)
出处
《海洋测绘》
CSCD
北大核心
2023年第1期53-57,共5页
Hydrographic Surveying and Charting
基金
黑龙江测绘地理信息局科技基金(202010)。
关键词
冰川运动监测
激光测高
冰川流速监测
高程变化监测
哨兵一号
glacier movement monitoring
satellite altimetry
glacial velocity monitoring
elevation change monitoring
Sentinel-1
