基于激光测高数据的Amery冰架高程变化监测研究  

Research on Amery ice shelf elevation change monitoring based on laser altimetry data

作　　者：刘沼辉 朱李忠[1,2] 齐忠华 LIU Zhaohui;ZHU Lizhong;QI Zhonghua(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 Peaple's Republic of China,Harbin 150081,China)

机构地区：[1]黑龙江测绘地理信息局极地测绘工程中心,黑龙江哈尔滨150081 [2]自然资源部极地测绘科学重点实验室,黑龙江哈尔滨150081

出　　处：《海洋测绘》2023年第5期61-66,共6页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41876223)。

摘　　要：针对传统的花杆测量法、GPS实测法在南极冰架高程变化监测上的覆盖范围小、操作难度大和安全成本高以及基于SAR差分干涉冰雪表面高程测量易失相干等问题。基于亚米级卫星激光测高数据ICESat/GLAS与ICESat-2/ATLAS重叠点法和克里金插值法,对Amery冰架近15年高程变化进行监测。为了纵向比较,本文以2003~2018年、2004~2019年和2005~2020年3组15年周期数据进行高程变化监测。实验结果表明:在近15年里Amery冰架冰雪物质积累区域大于减少区域,高程变化主要分布在0~±2 m之间,在冰架与大洋接壤区域高程显著升高近40 m。从3组数据纵向对比分析发现,Amery冰架中部区域高程变化相对稳定,边缘区域受接壤冰盖影响年际波动相对较大。Aiming at the problems of small coverage,difficult operation and high safety cost of the traditional flower pole measurement method and GPS measurement method in the monitoring of the elevation change of the Antarctic ice shelf,as well as the loss of coherence of the ice and snow surface elevation measurement based on SAR differential interferometry.Based on the sub meter satellite laser altimetry data icesat/GLAS and icesat-2/ATLAS overlap point method and Kriging interpolation method,this paper monitors the elevation change of Amery ice shelf in recent 15 years.For vertical comparison,this paper monitors the elevation change with three groups of 15 year data from 2003 to 2018,2004 to 2019 and 2005 to 2020.The experimental results show that in the past 15 years,the accumulation area of ice and snow materials on the Amery ice shelf is larger than the reduction area,and the elevation change is mainly distributed in the range of 0-2 m.The elevation in the area where the ice shelf borders the ocean has increased significantly by nearly 40 m.From the vertical comparison and analysis of the three groups of data,it is found that the elevation change in the central area of the Amery ice shelf is relatively stable,and the interannual fluctuation in the edge area is relatively large due to the influence of the contiguous ice sheet.

关 键 词：卫星激光测高 高程变化监测 ICESat-1/2数据 埃默里冰架 克里金插值 

分 类 号：P23[天文地球—摄影测量与遥感]