摘要
中国第32次南极考察内陆队首次使用雪地车载浅层探冰雷达取得了中山站至昆仑站全程1 300 km的浅层冰盖数据,通过MATLAB对数据进行FFT转换、背景滤波、改变叠加次数去噪和基于曲波变换的图像处理,使用Reflexw对MATLAB处理后数据进行地形校正、二次背景滤波和平滑滤波等处理,成功提取了冰盖浅层等时层并得出了等时层的平均深度、最大深度和波动情况。最后进行了数据的连接,展示了LGB69冰芯处等时层的分布并与冰芯数据结合大体对应了相应等时层的年代和事件。给出了Dome A附近的等时层分布情况。为东南极中山站至昆仑站沿途的物质积累率计算提供重要的数据支撑。
During the 32 nd China Antarctic Expedition,the Travelers first used the shallow ice radar to obtain the shallow ice cover data of 1 300 km from Zhongshan station to Kunlun station.In this paper,through MATLAB to FFT convert,background filtering,change the number of superposition and denoising based on curvelet transform image processing.Using Reflexw to elevation correction,secondary background filtering and smoothing filtering,and the isochronous layers are successfully extracted.Meanwhile the average depth,the maximum depth and the fluctuation of the isochronic layer are obtained.Finally,the data are connected to show the distribution of isochronal layers near the LGB69 ice core and associated with the data of ice core roughly corresponds to the age and event of the corresponding isochronal layer.Also,we show the distribution near Dome A.Which is important to analysis the material accumulation rate along Zhongshan station-Kunlun station in East Antarctica.
出处
《冰川冻土》
CSCD
北大核心
2017年第2期252-258,共7页
Journal of Glaciology and Geocryology
基金
国家重大科学研究计划项目(2013CBA01804)
极地专项课题(CHINARE-2016-02-02)资助
关键词
东南极
冰盖浅层
冰雷达
等时层
East Antarctic
shallow ice sheet
ice radar
isochronous layer
