地球科学进展

地球科学进展 ›› 2016, Vol. 31 ›› Issue (2): 206 -212. doi: 10.11867/j.issn.1001-8166.2016.02.0206.

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基于多源遥感数据的南极三大冰架前端变化分析
吴晨曦 1, 2( ), 刘世杰 1, 2,,A; *( ), 田一翔 1, 2, 童小华 1, 2   
  1. 1.同济大学 测绘与地理信息学院,上海 200092
    2.同济大学 空间信息科学及可持续发展应用中心,上海 200092
  • 收稿日期:2015-11-30 修回日期:2016-01-19 出版日期:2016-02-20
  • 通讯作者: 刘世杰 E-mail:13_wuchenxi@tongji.edu.cn;liusjtj@tongji.edu.cn
  • 基金资助:
    国家重大科学研究计划项目“近百年极地冰盖/冰架变化对全球海平面上升的总体贡献定量研究”(编号:2012CB957701)和“全球海平面上升对我国典型区域海平面的影响研究”(编号:2012CB957704)资助

Change Analysis of Three Major Antarctic Ice Shelves Based on Multi-source Remote Sensing Data

Chenxi Wu 1, 2( ), Shijie Liu 1, 2, *( ), Yixiang Tian 1, 2, Xiaohua Tong 1, 2   

  1. 1.College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China
    2.Center for Spatial Information Science and Sustainable Development, Tongji University, Shanghai 200092, China
  • Received:2015-11-30 Revised:2016-01-19 Online:2016-02-20 Published:2016-02-10
  • Contact: Shijie Liu E-mail:13_wuchenxi@tongji.edu.cn;liusjtj@tongji.edu.cn
  • About author:

    First author:Wu Chenxi(1991-), female, Nantong City, Jiangsu Province, Master student. Research areas include polar remote sensing research.E-mail:13_wuchenxi@tongji.edu.cn

    Corresponding author:Liu Shijie(1982-), male, Loudi City, Hu’nan Province, Lecturer. Research areas include high resolution remote sensing and its applications.E-mail:liusjtj@tongji.edu.cn

  • Supported by:
    Project supported by the National Key Basic Research Program of China “Precise quantitative study of mechanisms of polar ice and sea-level change of global and typical areas over the past century”(No.2012CB957701) and “Global sea level rising impact on typical regional sea level of China”(No.2012CB957704)
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近年来,南极冰架发生较多消融、崩解等现象。利用已有的1997年和2000年的Radarsat全南极海岸线产品、2003/2004年和2008/2009年的MODIS全南极海岸线产品,以及基于2006年、2012年和2015年MODIS影像提取的海岸线,共7期数据,对南极Ross,Filchner-Ronne和Amery三大冰架前端的变化进行了分析,以变化面积、累积变化量(Shoreline Change Envelope,SCE)和净变化量(Net Shoreline Movement,NSM)3个指标来评估冰架前端的变化。结果表明,1997—2015年,Amery冰架一直呈现增长趋势,前端大部分区域往外延伸20~25 km,增长面积达3.03×103 km2;Ross冰架和Filchner-Ronne冰架在发生崩解后受上游冰川推进作用仍不断向外增长,但增长面积小于崩解退缩面积,冰架面积分别减少9.39×103 km2和5.86×103 km2,冰架崩解区域前端退缩最大达到53 km和39 km。

关键词: 南极, 冰架, 海岸线, 变化分析

In recent years, melting and calving happen in the Antarctic ice shelves. In this paper, seven periods of coastlines were applied to provide an analysis of the ice front changes of Ross, Filchner-Ronne and Amery ice shelves with the inclusion of 1997 and 2000 Radarsat products, 2003/2004 and 2008/2009 MODIS products and 2006, 2012, 2015 coastline which were extracted from MODIS images. Change area, SCE (Shoreline Change Envelope) and NSM (Net Shoreline Movement) were applied to analyze the variation of the ice shelf front. The results shows that, the ice front of Amery ice shelf has advanced since 1997 and the total outward extension distance of the ice front was about 20 to 25 km while the advance area reached 3.03×103 km2. Ross ice shelf and Filchner-Ronne ice shelf continued to advance after ice calving events under the driver action of glacier. However, the advance area was less than the retreat area and the net change area is respectively -9.39×103 km2 and -5.86×103 km2. The retreat distance of the collapse area were up to 53 km and 39 km in the two biggest ice shelves.

Key words: Antarctica, Ice shelf, Coastline, Change analysis.

中图分类号: 

图1 研究区域及数据
(a)三大冰架在南极的分布图;(b)Ross冰架多时期海岸线;(c)Filchner-Ronne冰架多时期海岸线;(d) Amery冰架多时期海岸线,底图为1997年Radarsat镶嵌图 [ 16 ]
Fig.1 Study area and data
(a) Distribution of three biggest ice shelves;(b) Coastlines of Ross ice shelf during a continuous period;(c) Coastlines of Filchner-Ronne ice shelf during a continuous period;(d) Coastlines of Amery ice shelf during a continuous period. The background is Radarsat Mosaic in 1997 [ 16 ]
表1 三大冰架前端面积变化量(单位: 10 3 km 2)
Table 1 The area changes of the three biggest ice shelves (unit: 10 3 km 2)
时间段 Ross Filchner-Ronne Amery
1997—2000年 -10.82 -16.25 0.50
2000—2003/2004年 -5.07 2.39 0.34
2003—2006年 1.33 1.27 0.49
2006—2008/2009年 1.33 1.44 0.56
2009—2012年 2.18 3.16 0.53
2012—2015年 1.67 2.12 0.61
总变化量 -9.39 -5.86 3.03
图2 Ross冰架前端变化图
Fig.2 The ice front changes of Ross ice shelf
图3 Ross冰架前端海岸线变化范围图
Fig.3 The coastline change range of Ross ice shelf
图4 Filchner-Ronne冰架前端变化图
Fig.4 The ice front changes of Filchner-Ronne ice shelf
图5 Filchner-Ronne冰架前端海岸线变化范围图
Fig.5 The coastline change range of Filchner-Ronne ice shelf
图6 Amery冰架前端海岸线变化范围图
为对应NSM和SCE图,将影像逆时针旋转90°
Fig.6 The coastline change range of Amery ice shelf
For the corresponding figure NSM and SCE, rotating the upper image 90 counterclockwise
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