Evidence of Paleo-glacier Left on the Glaciomarine Landforms on the Terra Nova Bay,  Antarctica: Reconstructing Terra Nova Ice Shelf

Hyun Hee Rhee

doi:10.22776/kgs.2023.58.4.438

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2023 Vol.58, Issue 4 Preview Page Next Page

Research Article

Evidence of Paleo-glacier Left on the Glaciomarine Landforms on the Terra Nova Bay, Antarctica: Reconstructing Terra Nova Ice Shelf 남극 테라노바 만의 빙해양 지형에 남겨진 고빙하의 증거 - 테라노바 빙붕의 복원 -

31 August 2023. pp. 438-451

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Abstract

The existence of glacial landforms provides clues and insights into past glacier shapes and flow directions, and physical interactions between glacier drainages. The recent development of various topographical analyses and surveying technologies has made it possible to acquire bathymetric data and analyze topography even in a glaciomarine environment with poor accessibility. This study detected glaciomarine landforms in various scales developed on the continental shelf of the Antarctic Ross Sea through Surface Roughness and Bathymetric Position Index analyses, and the distribution and structural characteristics of Mega-Scale Glacial Lineations, Drumlinoids, Moraines, Grounding Zone Wedges, Ridges, Troughs, and Banks were analyzed. The existence of a paleo-glacier “Terra Nova Ice Shelf” was found based on the records of glaciomarine and onshore glacial landforms, and its detailed ice dynamics were reconstructed through the interpretation of multi-dimensional scales of paleo-glacier drainages and physical interactions between the drainages.

Keywords

Antarctic Ice Shelf

Glaciomarine Landform

Surface Roughness

Bathymetric Position Index

Paleo-glacier Reconstruction

빙하 지형의 존재는 과거 빙하의 형태와 흐름 방향, 그리고 빙하 유역 간 물리적 상호 작용에 대한 단서와 통찰을 제공한다. 근래의 다양한 지형 분석 기법과 측량 기술의 개발을 바탕으로 접근성이 떨어지는 빙해양 환경에서도 수심 자료를 획득하고 지형을 분석할 수 있게 되었다. 본 연구는 표면 거칠기 분석과 수심 위치 지수 분석을 통해 남극의 로스해 대륙붕에 형성된 다양한 규모의 빙해양 지형을 감지하였으며, 거대 빙하 침식선형구조, 드럼린, 모레인, 빙하 접지대, 해저융기부, 해곡, 해퇴 등의 분포와 구조적 특성을 분석하였다. 또한 빙해양지형과 육상 빙하지형의 기록들을 기반으로 고빙하 “테라노바 빙붕”의 존재를 발견하였고, 과거 빙하의 다차원적 유역 규모와 유역 간 물리적 상호 작용을 해석하여 구체적인 빙하 거동을 복원하였다.

키워드

남극 빙붕

빙해양 지형

표면 거칠기

수심 위치 지수

고빙하 복원

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Information

Publisher :The Korean Geographical Society
Publisher(Ko) :대한지리학회
Journal Title :Journal of the Korean Geographical Society
Journal Title(Ko) :대한지리학회지
Volume : 58
No :4
Pages :438-451
Received Date : 2023-08-10
Revised Date : 2023-08-28
Accepted Date : 2023-08-28
DOI :https://doi.org/10.22776/kgs.2023.58.4.438

Journal of the Korean Geographical Society ISSN:1225-6633(Print) 대한지리학회지

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