基于SAR数据的南极冰山分布监测  

Investigation of Antarctic iceberg distribution based on SAR images

作　　者：李田 程晓[1,2,3,4] 关真富 刘岩 LI Tian;CHENG Xiao;GUAN Zhenfu;LIU Yan(State Key Laboratory of Remote Sensing Science,College of Global Change and Earth System Science,Beijing Normal University,Beijing 100875;School of Geospatial Engineering and Science,Sun Yat-sen University,Zhuhai 519000;University Corporation for Polar Research,Beijing 100875;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519000)

机构地区：[1]北京师范大学全球变化与地球系统科学研究院/遥感科学国家重点实验室,北京100875 [2]中山大学测绘科学与技术学院,珠海519000 [3]中国高校极地联合研究中心,北京100875 [4]南方海洋科学与工程广东省实验室(珠海),珠海519000

出　　处：《南京信息工程大学学报（自然科学版）》2020年第2期231-235,共5页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：国家自然科学基金(41830536,41676176,41676182,41406211);国家重点研发计划(2016YFA0600103)。

摘　　要：随着全球气候变暖,冰架崩解事件的发生愈益频繁.冰架崩解产生的冰山是南极冰盖-冰架-海洋系统中活跃的组成部分,冰山的运动特征和时空分布对南大洋洋流循环、海洋生态以及水文系统有着非常重要的影响.因此利用卫星遥感监测冰山运动与变化信息,探究冰山崩解和消融过程,研究南极冰山分布,以及冰山和周围海洋环境之间的相互作用机制,是理解南极冰山变化与全球气候变化之间关系的关键.本文利用覆盖全南极海岸线的ENVISAT ASAR影像,基于简译软件的面向对象的多尺度图像分割算法实现了全南极近岸海域冰山对象的提取.利用2006年8月63期ENVISAT ASAR影像提取了32 267座面积大于0.06 km^2的冰山,统计了冰山空间分布特征,研究发现南极小型冰山在全南极淡水输入中扮演着重要的作用.In the context of global warming,the calving events of Antarctic ice shelves are becoming more and more frequent.The icebergs calved from ice shelves are an active component of Antarctic ice sheet-ice shelf-ocean system,while the drifting characteristics and temporal-spatial distribution of icebergs are very important in Antarctic ocean currents,ecology and hydrology.To better understand the underlying relationship between Antarctic icebergs and global climate change,it is essential to investigate the icebergs’ drifting characteristics,mass loss due to calving and melting,icebergs distribution,and the interaction between icebergs and the ocean.Based on the object-oriented multiscale image segmentation algorithm of Easy Interpretation software,a total of 32 267 Antarctic icebergs in coastal waters with area larger than 0.06 km^2 were extracted from 63 ENVISAT ASAR images acquired in August 2006.The spatial distribution characteristics of icebergs were also analyzed,and it is found that small-sized icebergs play an important role in freshwater flux into the Southern Ocean.

关 键 词：南极 冰山 ENVISAT ASAR 多尺度分割 

分 类 号：TN957.52[电子电信—信号与信息处理] P941.6[电子电信—信息与通信工程]