基于多源遥感数据的南极三大冰架前端变化分析

发布时间：2018-05-01 23:50

本文选题：南极 + 冰架　；参考：《地球科学进展》2016年02期

【摘要】：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3.03×103km2;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9.39×103km2和5.86×103km2,冰架崩解区域前端退缩最大达到53 km和39 km。
[Abstract]:In recent years, the Antarctic ice shelf has more ablation, disintegration and other phenomena. Using the existing Radarsat all Antarctic coastline products from 1997 and 2000, MODIS all Antarctic coastline products from 2003 / 2004 and 2008 / 2009, as well as shoreline extracted from 2006, 2012 and 2015 MODIS images, a total of 7 issues of data were used. The changes of the front ends of the Rossberg Filchner-Ronne and Amery ice shelves are analyzed. The changes of the ice shelf front end are evaluated by three indexes, namely, the area of change, the cumulative variation and the net variation, net Shoreline movement. The results show that the Filchner-Ronne ice shelf has been showing an increasing trend from 1997 to 2015. The front end of the ice shelf extends from 20 to 25 km, and the growth area reaches 3.03 脳 10 ~ 3 km ~ 2 Ross ice shelf and Filchner-Ronne ice shelf. However, the increase area is smaller than that of disintegration and retreat area, the ice shelf area decreases by 9.39 脳 103km2 and 5.86 脳 10 ~ 3km ~ (2), respectively, and the maximum retreat of the front end of the ice shelf disintegration region reaches 53 km and 39 km respectively.
【作者单位】：同济大学测绘与地理信息学院;同济大学空间信息科学及可持续发展应用中心;
【基金】：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~~
【分类号】：P343.6;P237

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