利用偏移量跟踪测定Amery冰架冰流汇合区的冰流速  

Ice-flow Velocity Derivation of the Confluence Zone of the Amery Ice Shelf Using Offset-tracking Method

作　　者：邓方慧 周春霞[1,2] 王泽民[1,2] 鄂栋臣[1,2] 张辛 

机构地区：[1]武汉大学中国南极测绘研究中心,湖北武汉430079 [2]武汉大学极地测绘科学国家测绘地理信息局重点实验室,湖北武汉430079 [3]长江勘测规划设计研究院,湖北武汉430010

出　　处：《武汉大学学报（信息科学版）》2015年第7期901-906,共6页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41376187;41076126;41276188);国家973计划资助项目(2013CBA01804);国家海洋局南北极环境综合考察与评估专项资助项目(CHINARE2014-02-04)~~

摘　　要：利用35d时间基线的Envisat ASAR数据对,采用偏移量跟踪方法对东南极Amery冰架冰流汇合区的冰流速进行了测定,并对流速结果进行了精度评定和对比分析,验证了本文结果的可靠性。结果显示,Lambert、Mellor及Fisher冰川在Amery冰架后缘交汇处冰流速最大可达800m/a;汇合区接地线附近的冰流速存在一定的变化特征,该特征是辅助确定接地线位置的重要参考信息。Three pairs of Envisat ASAR images at a 35 days interval were utilized to map the ice velocity in the confluence zone of the Amery ice shelf in the East Antarctica using an offset-tracking method.Accuracy assessment and comparative analysis were conducted,which confirmed the reliability of our results.The ice velocity reached as high as 800m/a at the confluence zone of the Lambert,Mellor,and Fisher Glaciers.There were certain variation characteristics of ice velocity near the grounding line,which provided important references when determining the position of the grounding line.

关 键 词：AMERY冰架 偏移量跟踪 冰流速 接地线 

分 类 号：P225[天文地球—大地测量学与测量工程]