Japan Geoscience Union Meeting 2021

Presentation information

Print

[E] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS05] Global climate change driven by the Southern Ocean and the Antarctic Ice Sheet

Sun. Jun 6, 2021 5:15 PM - 6:30 PM Ch.20

convener:Osamu Seki(Institute of Low Temperature Science, Hokkaido University), Yoshifumi Nogi(National Institute of Polar Research), Akira Oka(Atmosphere and Ocean Research Institute, The University of Tokyo), Yusuke Suganuma(National institute of Polar Research)

5:15 PM - 6:30 PM

[MIS05-P08] Vertical fluctuation area of ice shelf due to tidal fluctuations in the Langhovde Glacier using DDInSAR.

*Chiyuki Narama1, Tsutomu Yamanokuchi2, Shin Sugiyama3 (1.Niigata University, Program of Field Research in the Environmental Sciences, 2.RESTEC, 3.Hokkaido University, Institute of Low Temperature Science)

Keywords:ice shelf, tidal fluctuations , DDInSAR, grounding line

The USAP and SCAR data show grounding line data in the East Antarctica based on optical images and Interferometric SAR (InSAR) data of ERS-1/2 data taken around 1995-1996 (Konrad et al., 2018). However, the accuracy of the positions is not perfect, because the grounding line may change on the tidal condition. In this study, we tried to detect a vertical fluctuation area of ice shelf in response to tidal fluctuations in the Langhovde Glacier, located on eastern part of Lützow-Holm Bay in East Antarctica based on satellite data. We used Double Differential InSAR (DDInSAR; Doi et al., 2011), analysis method in this study. This method can extract phase difference caused by tidal movement for detecting a grounding line by removal of the phases caused by the glacier flow and topography.