Distribution of Shallow Isochronous Layers in East Antarctica Inferred from Frequency-Modulated Continuous-Wave (FMCW) Radar

Main Article Content

Wangxiao Yang
Yinke Dou
Shinan Lang
Jingxue Guo
Guangyu Zuo
Yan Chen
Yuchen Wang

Abstract

During the 32nd Chinese National Antarctic Research Expedition, the Frequency-Modulated Continuous-Wave (FMCW) radar was used for the first time to obtain the distribution of shallow isochronous layers within the East Antarctic region extending from Zhongshan Station to Kunlun Station. Taking a typical area as a case study, this article describes the complete workflow used in radar data processing, including signal processing and extraction of isochronous layers. The wave velocity model is established according to an empirical formula to calculate the depth of the layer, and the result is compared and corrected with the volcanic record in ice core DT263; the relative error of depth is only approximately 5%. The echograms of the isochronous layers in three regions are presented, including the area around the Dome A, the area 100 km from the Dome A and the area in the Lambert Glacier. A comparison of the echograms within the three regions shows that the isochronous layers are relatively stable in the Dome A and change more intensely in the Lambert Glacier, while the folding of the layer occurs in a concentrated area near Dome A. This folding may be due to the local layer mixing and compression caused by the ice flow and wind-driven processes. The analysis of the distribution of the shallow isochronous layers and age-depth information from different regions provides important data that support the calculation of large-scale accumulation rates and flow history in the Antarctic.

Article Details

How to Cite
1.
Yang W, Dou Y, Lang S, Guo J, Zuo G, Chen Y, Wang Y. Distribution of Shallow Isochronous Layers in East Antarctica Inferred from Frequency-Modulated Continuous-Wave (FMCW) Radar. Ann. Geophys. [Internet]. 2020Jul.30 [cited 2021Oct.19];63(4):RS413. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/7794
Section
Remote Sensing for Earth Observations
Author Biographies

Wangxiao Yang, Taiyuan University of Technology

Electrical and Power Engineering,Ph.D. candidate

Yinke Dou, Taiyuan University of Technology

Electrical and Power Engineering, professor

Shinan Lang, Beijing Univ Technol

Sch Informat & Commun Engn

Jingxue Guo, Polar Res Inst China

Senior engineer

Guangyu Zuo

Coll Elect & Power Engn,Postgraduate

Yan Chen, Taiyuan Univ Technol

Coll Elect & Power Engn