globalchange  > 气候变化与战略
CSCD记录号: CSCD:5781281
论文题名:
基于特征跟踪方法的Amery冰架上游流速估算
其他题名: UPSTREAM VELOCITY OF THE AMERY ICE SHELF DERIVED FROM SATELLITE RADAR FEATURE TRACKING
作者: 邵珠德; 柯长青
刊名: 极地研究
ISSN: 1007-7073
出版年: 2016
卷: 28, 期:3, 页码:222-228
语种: 中文
中文关键词: 特征跟踪 ; 冰川流速 ; Amery冰架
英文关键词: ALOS /PALSAR ; ALOS /PALSAR ; feature tracking ; glacier velocity ; Amery Ice Shelf
WOS学科分类: GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向: Geology
中文摘要: 冰川流速分析对于研究南极冰盖物质平衡、海平面上升和全球气候变化具有重要意义。以ALOS /PALSAR影像为数据源,采用SAR特征跟踪方法,结合DEM数据估算Amery冰架上游冰川流速。结果表明,Amery冰架上游主流线流速为540720 m·a~(-1),冰川流速随海拔的降低逐渐减小。受基岩和两侧山体的影响,主流线流速大,越靠近两侧山体流速越小。这个结果与NASA 2000年利用SAR重复轨道干涉测量方法测定的流速接近。基于裸露岩石作为特征点的分析表明,该方法误差较小,获取的冰川流速比较可靠。
英文摘要: The flow rates of glaciers hold special significance in the analysis of the mass balance of the Antarctic ice sheet and its effect on sea-level rise and global climate change. In this study,ALOS /PALSAR imagery was combined with a digital elevation model,and the synthetic aperture radar intensity feature tracking method was used to obtain the upstream glacier velocity of the Amery Ice Shelf. The results showed that the flow rate of the main streamline ranged from 540 to 720 m·a~(-1) in the upstream region of the Amery Ice Shelf,and gradually decreased with decreasing elevation. Under the influence of bedrock and highlands on the two sides of the shelf,the flow rate of the main streamline was negatively correlated to the distance from the surrounding highlands. This result is in accord with the flow rate that was measured by NASA in 2000 using the radar repeat track interferometry method. Our analysis using bare rocks as reference points indicates that the associated error is relatively small and the ice flow rate obtained by this approach is reliable.
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/151030
Appears in Collections:气候变化与战略

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作者单位: 南京大学地理与海洋科学学院, 南京, 江苏 210023, 中国

Recommended Citation:
邵珠德,柯长青. 基于特征跟踪方法的Amery冰架上游流速估算[J]. 极地研究,2016-01-01,28(3):222-228
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