Monitoring of seasonal changes of Martian north polar ice cap with OMEGA images
ZHAGN Dingkai1,2, LIU Zhaoqin2, DI Kaichang2, YUE Zongyu2, LIU Feng1, GOU Sheng2
1. Survey and Mapping Institute of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China;
2. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China
The spatial variation extent of the annual seasonal melt of Martian polar ice caps is the most direct reflection of Mars global and regional climate changes. A method that utilizes hyperspectral images from OMEGA spectrometer on board ESA Mars Express for monitoring Mars ice cap by extracting seasonal ice cap ablation line is proposed in this study. Based on OMEGA infrared images from 6 periods of Martian year 28 and 29 that cover Martian northern hemisphere, the boundary of seasonal ice cap was extracted by supervised classification method which can distinguish between ice and bare land, and the melting rate of seasonal ice cap was also calculated and analyzed, with validation from high resolution HiRISE images. The results show that the melting rate of Martian northern polar ice cap is about 106 km2 every 10° solar longitude (LS). In addition, the comparison between the results and the terrain data from MOLA reveals that the regional abnormality of ice cap melting is mainly caused by the crater-induced topographic variation.
张鼎凯, 刘召芹, 邸凯昌, 岳宗玉, 刘峰, 芶盛. 基于OMEGA影像火星北极冰盖季节性变化监测[J]. 国土资源遥感, 2016, 28(2): 99-105.
ZHAGN Dingkai, LIU Zhaoqin, DI Kaichang, YUE Zongyu, LIU Feng, GOU Sheng. Monitoring of seasonal changes of Martian north polar ice cap with OMEGA images. REMOTE SENSING FOR LAND & RESOURCES, 2016, 28(2): 99-105.
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