Evaluation of the Marine Ice Sheet/Ice Cliff Instabilities on the Glaciers of Terra Nova Bay,  Antarctica

Hyun Hee Rhee

doi:10.22776/kgs.2023.58.3.318

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2023 Vol.58, Issue 3 Preview Page Next Page

Research Article

Evaluation of the Marine Ice Sheet/Ice Cliff Instabilities on the Glaciers of Terra Nova Bay, Antarctica 남극 테라노바 만 빙하의 해양 빙상/빙벽 불안정성 평가

30 June 2023. pp. 318-329

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Abstract

Thickly developed Antarctic ice sheet flows over Antarctica, and transformed into ice shelf or ice tongue with mass wasting into the ocean. Marine Ice Sheet Instability and Marine Ice Cliff Instability caused by geomorphological and oceanic factors are accelerating the glacial mass loss in addition to the climate factor, Global Warming. Subglacial landforms behind the glacial grounding line affect the ice buttressing on the sea, and the supraglacial fractures in front of the grounding line cause the collapse or calving of the ice cliff. Using a digital elevation model, the morphological analysis of subglacial bed and supraglacial ice would find potential danger zones and assess the risks. Predictions and preparations for additional crises of sea level rise must be made by tracking, observing, and assessing research on risky factors which cause the ablation of the terminal of the Antarctic ice sheet.

Keywords

Antarctic Ice Sheet

Marine Ice Sheet Instability

Marine Ice Cliff Instability

Subglacial Landform

Glacial Collapse

Sea Level Rise

남극 빙상은 남극 대륙 위에 두껍게 성장해 흘러내려가며, 말단부에서 빙붕이나 빙설로 변형되어 해양으로 소모되고 있다. 온난화와 같은 기후 요인과 더불어 지형적, 해양적 요인으로 인해 발생하는 해양 빙상 불안정성과 해양 빙벽 불안정성은 빙하의 소모를 가속시키고 있다. 빙하 접지선 배후의 기저 지형은 해양에 떠있는 빙하의 지지력에 영향을 미치며, 빙하 접지선 전면부의 빙하 표면 균열은 빙벽의 붕괴와 분리를 야기한다. 수치고도자료를 이용한 빙하 기저 지형과 빙하 표면의 형태 분석은 이러한 위험요소가 나타나는 지역을 찾아내고 위험도를 평가할 수 있다. 남극 빙상 말단부의 소모를 유발하는 위험인자들을 지속적으로 추적, 관찰, 평가하는 연구를 통해 해수면의 추가적인 상승 위기를 예측하고 대비해야 한다.

키워드

남극 빙상

해양 빙상 불안정성

해양 빙벽 불안정성

빙하기저지형

빙하 붕괴

해수면 상승

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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 :3
Pages :318-329
Received Date : 2023-06-04
Revised Date : 2023-06-25
Accepted Date : 2023-06-26
DOI :https://doi.org/10.22776/kgs.2023.58.3.318

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

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