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NTIS 바로가기자원환경지질 = Economic and environmental geology, v.53 no.2, 2020년, pp.147 - 157
엄주영 (경북대학교 지구과학교육과) , 임형래 (부산대학교 지구과학교육과)
Mass change in the Antarctic Ice Sheet(AIS) is the most important indicator of changes in Earth's climate system including global mean sea level rise that are largely affected by ongoing global warming. In this study, AIS mass variations are examined with satellite gravity data and outputs from a re...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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약간의 해수면 상승만으로도 막대한 경제적 피해가 발생할 수 있는 이유는? | 1 mm/yr정도는 AIS의 영향으로 추정되고 있다 (WCRP, 2018). 전 세계 인구의 약 23%는 바다로부터 100km 이내의 지역에 거주하며, 이곳의 인구 밀도는 세계 평균보다 약 세 배가 높다(Small and Nicholls, 2003). 그렇기 때문에 약간의 해수면 상승만으로도 막대한 경제적 피해가 발생할 것이며, 사회, 정치적으로 상당한 파장이 예상된다. | |
남극 대륙 빙상의 규모는 무엇인가? | 남극 대륙을 덮고 있는 빙상(Antarctic Ice Sheet, AIS)은 세계에서 가장 큰 단일 담수 저장고로서, 그 부피가 약 2.7 × 107km3 정도에 달한다. 만약 이 곳의 얼음이 모두 녹아 바다로 유입되면, 지구의 평균 해수면(global mean sea level, GMSL)은 약 58 m 정도 상승하게 된다(Fretwell et al. | |
AIS 질량 감소의 원인으로 추정되는 것은? | 지난 26년 간(1992-2017), AIS에서는 총 2,725 Giga-ton(이하 Gt)에 달하는 얼음이 소실되었다(IMBIE, 2018). 최근 몇몇 관측 결과에 의하면, 이러한 AIS 질량 감소의 대부분은 근래에 증가한 빙하 유속 때문인 것으로 추정된다(Rignot et al., 2018; van de Berg et al. |
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