Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region

doi:10.13474/j.cnki.11-2246.2021.0139

Abstract

Abstract: Based on the L-band ALOS PALSAR-2 data, this paper uses time series InSAR technology to dynamically monitor the Tibetan Plateau from September 2014 to August 2019 and combines the offset tracking method to obtain the difference of the results of the glacier flow velocity distribution in the distance, azimuth and horizontal directions some glaciers before and after the Nepal earthquake. It is found that during the monitoring period, there is a general phenomenon of subsidence in the study area, only a small range of uplift occurs in a few years, and the maximum annual average deformation rate can be achieved -203.1 mm/a during the monitoring period. it is believed that the earthquake has a special impact on the fluctuation of the time series observation results in the study area; during the study period, the velocity of some glaciers increased during a long period of time after the earthquake, and the maximum velocity can reach 2.645 m/d, it is believed that earthquake is the cause of the rapid increase in glacier velocity.

Key words: InSAR, time-serise, change offset-tracking, glacier velocity, Nepal earthquake

CLC Number:

P237

HE Zhengfeng, ZHANG Jixian, HUANG Guoman, SHENG Huijun. Influence of Nepal Mw7.8 earthquake on glacier deformation and velocity in the Everest region[J]. Bulletin of Surveying and Mapping, 2021, 0(5): 43-48,101.

References

[1] 向云飞, 岳建平, 李晶瑜,等. 尼泊尔Mw 7.8地震前后西藏西南部地区GPS时序特征演变分析[J]. 武汉大学学报(信息科学版), 2020, 45(4):115-123.
[2] RAVAL U. April 25, 2015 Nepal Earthquake[J]. Journal of the Geological Society of India, 2015, 86(4):504-504.
[3] FENG G C, LI Z W, SHAN X J, et al. Geodetic model of the 2015 April 25 Mw 7.8 Gorkha Nepal Earthquake and Mw 7.3 aftershock estimated from InSAR and GPS data[J]. Geophysical Journal International, 2015,203(2):896-900.
[4] 姚檀栋,姚治君.青藏高原冰川退缩对河水径流的影响[J].自然杂志,2010,32(1):4-8.
[5] 姚檀栋,秦大河,沈永平,等.青藏高原冰冻圈变化及其对区域水循环和生态条件的影响[J].自然杂志,2013,35(3):179-186.
[6] 叶庆华,程维明,赵永利,等.青藏高原冰川变化遥感监测研究综述[J].地球信息科学学报,2016,18(7):920-930.
[7] 王平,任小冲,尹宏杰,等.基于PALSAR数据的青藏高原地区冻土形变监测[J].工程勘察,2010,38(1):55-58.
[8] 邬光剑,姚檀栋,王伟财,等.青藏高原及周边地区的冰川灾害[J].中国科学院院刊,2019,34(11):1285-1292.
[9] BERARDINO P, FORNARO G, LANARI R, et al. A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms[J]. IEEE Transactions on Geoscience & Remote Sensing, 2002, 40(11):2375-2383.
[10] 丁朋朋,贾超,韩瑶,等.时序InSAR技术的潍北平原地面沉降分析[J/OL].测绘科学:1-9(2020-09-10)[2021-03-23].http://kns.cnki.net/kcms/detail/11.4415.P.20200908.1921.002.html.
[11] 聂运菊,汪博军,王晓筱.时序InSAR技术在合肥市地面沉降监测中的应用[J].城市勘测,2020(5):120-124.
[12] 张生鹏,周中正,赵利江,等.基于SAR偏移量跟踪法提取岗纳楼冰川流速[J].测绘通报,2020(11):33-38.
[13] 丁一凡,程晓,程铖,等.基于偏移追踪的青藏高原卓琼冰川流速监测及成因分析[J].地球物理学报,2017,60(5):1650-1658.
[14] 陈筠力,李威.国外SAR卫星最新进展与趋势展望[J].上海航天,2016,33(6):1-19.
[15] 高海英,赵争,章彭.时序InSAR的贵州地质灾害监测[J].测绘科学,2020,45(7):91-99.
[16] 姚丹丹. 基于偏移追踪法的D-InSAR矿区形变监测技术[D].徐州:中国矿业大学,2016.
[17] STROZZI T. Glacier motion using satellite-radar offset tracking procedures[J]. IEEE Transactions on Geoscience and Remote Sensing, 2002, 40(11):2384-2391.
[18] NATSUAKI R, MOTOHKA T, WATANABE M, et al. Emergency observation and disaster monitoring performed by ALOS-2 PALSAR-2[C]//IGARSS 2016-2016 IEEE International Geoscience and Remote Sensing Symposium.
[S.l.]:IEEE, 2016.
[19] 丁超,冯光财,周玉杉,等.尼泊尔地震触发滑坡识别和雪崩形变分析[J].武汉大学学报(信息科学版),2018,43(6):847-853.