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[期刊论文]

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

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作者:

Yang, Wangxiao (Yang, Wangxiao.) | Dou, Yinke (Dou, Yinke.) | Lang, Shinan (Lang, Shinan.) | 展开

收录:

SCIE

摘要:

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.

关键词:

Frequency Modulated Continuous Wave (FMCW) radar Shallow isochronous layer Horizon fluctuation Distribution characteristics Horizon data extraction

作者机构:

  • [ 1 ] [Yang, Wangxiao]Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China
  • [ 2 ] [Dou, Yinke]Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China
  • [ 3 ] [Zuo, Guangyu]Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China
  • [ 4 ] [Chen, Yan]Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China
  • [ 5 ] [Wang, Yuchen]Taiyuan Univ Technol, Coll Elect & Power Engn, Taiyuan 030024, Peoples R China
  • [ 6 ] [Lang, Shinan]Beijing Univ Technol, Sch Informat & Commun Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Guo, Jingxue]Polar Res Inst China, Shanghai 200136, Peoples R China

通讯作者信息:

  • [Dou, Yinke]Taiyuan Univ Technol, Elect & Power Engn, Taiyuan, Peoples R China

电子邮件地址:

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来源 :

ANNALS OF GEOPHYSICS

ISSN: 1593-5213

年份: 2020

期: 4

卷: 63

1 . 0 0 0

JCR@2022

ESI学科: GEOSCIENCES;

ESI高被引阀值:99

被引次数:

WoS核心集被引频次: 2

SCOPUS被引频次: 2

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