Three-Dimensional Modeling of Antarctic Local Ice Sheet Based on
Bedmap2 and Ice Radar Data
1 College of Surveying and Geo-Informatics, Tongji University, 1239 Siping Road, Shanghai 200092, China
2 Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200136, China
Abstract：The ice sheet 3D model, which includes ice surface, subglacial topography and internal structure, efficiently combines the internal and external ice sheet structure. It plays an important role in research on the mass balance of the Antarctic ice sheet, ice core drilling and ice-sheet models. With the Bedmap2 data and ice radar data collected during the 29th Chinese National Antarctic Research Expedition (CHINARE 29, 2012/11), we build an Antarctic local ice sheet 3D model of an 11.3 km × 11.5 km region located in the Gamburtsev mountains on the cross section from Zhongshan station to Dome A. This article highlights the data processing during the building of the 3D model. The ice radar collection uses the ice radar system developed by China. In the paper, the processing of ice radar data is described in detail, including data pre-processing, conventional image corrected technology and the gain of subglacial topography. The depth of isochronous layers and bedrock layers can be extracted from the ice radar data. We then generate the isochronous layers DEM (elevation 1 729 m-2 718 m) and bedrock layers DEM (elevation 2 601 m-2 950 m) with a suitable interpolation method. Combining with the ice surface DEM (elevation 3 679 m-3 745 m) extracted from the Bedmap2 data, we finally build a 3D model that includes a topographic of the ice surface, isochronous layers internal ice sheet and the subglacial bedrock. We then examine the model and make a preliminary analysis.
LIU Chun,SU Xiaogang,SUN Bo et al. Three-Dimensional Modeling of Antarctic Local Ice Sheet Based on
Bedmap2 and Ice Radar Data[J]. jgg, 2015, 35(6): 957-962.
