Ground-penetrating radar survey of subsurface features at the margin of ice sheet, East Antarctica

Guo，Jingxue1; Li，Lin1; Liu，Juncheng1,2; Fu，Lei3; Tang，Xueyuan1; Wang，Yuchen4; Yang，Wangxiao4; Dou，Yinke4; Liu，Sixin2; Lu，Qi2; Shi，Guitao5; Sun，Yang1

2022-11-01

10.1016/j.jappgeo.2022.104816

JOURNAL OF APPLIED GEOPHYSICS   影响因子和分区

0926-9851

1879-1859

The subglacial environment of East Antarctica remains largely unexplored. In this study, ground-penetrating radar (GPR) data of the ice-sheet margin in East Antarctica were collected and analysed, an average velocity of 0.18 m/ns was obtained through ice density conversion and common midpoint (CMP) survey. The thickness, internal layers, and bed elevation were used to determine the spatial characteristics of snow/firn in the survey area. The relative amplitudes of the reflections along the bedrock interface were computed to determine the potential presence of subglacial water in depressions, which is the most likely source of strong reflections at basal interfaces. Because the subglacial topography is associated with the dynamic characteristics of the ice sheet, the two-parameter roughness index was used to assess the regional roughness of the bedrock beneath the snow/firn and discuss the implications of changes at the bottom. This research provides insights into the physical characteristics of ice-sheet margins. The methodology proposed in this study should be applied in the future to quantify the physical parameters required for ice-sheet studies.

Amplitude Antarctica Ground penetrating radar Ice sheet margin Roughness Thickness

SCI

英语

其他

National Key Research and Development Program of China[2018YFB1307504];

Geology ; Mining & Mineral Processing

Geosciences, Multidisciplinary ; Mining & Mineral Processing

WOS:000867667300005

ELSEVIER

GEOSCIENCES

2-s2.0-85139009211

Scopus

1.Zhongshan National Ice and Space Environment Observation and Research Station,Polar Research Institute of China,Shanghai,200136,China
2.College of Geo-Exploration Science and Technology,Jilin University,Changchun,130026,China
3.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China
4.College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan,030024,China
5.Key Laboratory of Geographic Information Science (Ministry of Education),School of Geographic Sciences and State Key Lab of Estuarine and Coastal Research,East China Normal University,Shanghai,200241,China

Guo，Jingxue,Li，Lin,Liu，Juncheng,et al. Ground-penetrating radar survey of subsurface features at the margin of ice sheet, East Antarctica[J]. JOURNAL OF APPLIED GEOPHYSICS,2022,206.

Guo，Jingxue.,Li，Lin.,Liu，Juncheng.,Fu，Lei.,Tang，Xueyuan.,...&Sun，Yang.(2022).Ground-penetrating radar survey of subsurface features at the margin of ice sheet, East Antarctica.JOURNAL OF APPLIED GEOPHYSICS,206.

Guo，Jingxue,et al."Ground-penetrating radar survey of subsurface features at the margin of ice sheet, East Antarctica".JOURNAL OF APPLIED GEOPHYSICS 206(2022).