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利用卫星影像进行南极格罗夫山蓝冰变化监测

【标题】利用卫星影像进行南极格罗夫山蓝冰变化监测

【Title】Surface Deformation of Mt. Etna, Italy from PSInSAR

【作者】 鄂栋臣; 张辛; 王泽民; 周春霞

【Author】 E Dongchen ; Zhang Xin ; Wang Zemin ; Zhou Chunxia

【期刊】武汉大学学报(信息科学版)

【Journal】Geomatics and Information Science of Wuhan University

【期刊年份】2011

【卷】36

【期】9

【关键词】 格罗夫山; 南极; 蓝冰; 中等分辨率成像光谱仪(M ODIS); 陆地卫星( Landsat)

【Keywords】

【摘要】利用M ODIS 及Landsat 的系列影像数据, 监测东南极格罗夫山的蓝冰变化。首先, 使用M ODIS 原始数据进行蓝冰提取与范围统计, 总结了蓝冰年度内的变化规律: 蓝冰面积在9~ 12 月间有上升趋势, 直到第二年的1 月中旬至下旬达到面积最大值, 2~ 4 月面积重新减小。然后, 对Landsat 影像使用监督分类结合目视判别的方法提取蓝冰地物。通过蓝冰边缘线的比较, 得出蓝冰范围有东移趋势的结论。最后, 揭示了短波辐射与气候变化对蓝冰范围变化的影响。

【Abstract】In order to study the surface deformation of Etna Volcano, the StaMPS software is used to process the descending and ascending ASAR data, which were acquired between 2003 and 2010 respectively at Mt . Etna with PSInSAR method. And to obtain a deformation rate field with high- precision in the volcanic region, some feature points are extracted for the time series analysis. The results show that the average deformation rate in LOS ( line of sight ) direction is 7~ 12 mm/ a for eastern part and 1~ 3 mm/ a for western part in Etna volcano area.In the southeast and south of the volcano there are a large settlement and an uplift reg ion,where the vertical deformation rate are-4 mm/ a and 12 mm/ a respectively. The result indicates that the surface deformation in the southeast and south of the volcano region is largely ,the magma in the southeast and south of the volcano region is very actively and the volume of magma in Etna volcanic is in a growth phase.

【基金/项目】 利用多源遥感数据监测南极冰貌地形及其动态变化研究 ; 南极冰原裂隙及冰盖运动信息提取和定量分析

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