https://repository.kopri.re.kr/handle/201206/15687 2026-04-11T22:20:10Z https://repository.kopri.re.kr/handle/201206/16561 Title: Disappearance of the El Nino-driven surface mass gain in West Antarctica under future climate change Authors: Lee, Hyun-Ju; Jin, Emilia Kyung; Kim, Byeong-Hoon; Lee, Won Sang Abstract: Strong El Nino events drive substantial snowfall in West Antarctica, including the Antarctic Peninsula, by weakening the Amundsen Sea Low (ASL) through atmospheric teleconnections, increasing surface mass balance and mitigating ice mass loss’s contribution to sea-level rise. However, we find that CMIP6 projections show a diminishing El Nino-driven precipitation effect as global warming intensifies. The El Nino-associated precipitation anomaly is projected to weaken in SSP3-7.0 and SSP5-8.5, becoming indistinguishable from zero by the late 21st century in the latter. This transition is caused by a strengthened polar jet, linked to a positive Southern Annular Mode (SAM) trend in a warmer climate, which extends the wavelength of Rossby waves. As a result, the ASL anomaly eventually migrates eastward and equatorward, reducing water vapor transport into West Antarctica’s interior. These findings indicate that El Nino-driven precipitation disappears in a high-emission future, eliminating one of the buffering mechanisms that help counteract sea-level rise. 2025-11-01T00:00:00Z https://repository.kopri.re.kr/handle/201206/16598 Title: 로스해 대륙붕 수온의 역전과 2010년대 중반 이후 남극 해빙의 지속적인 감소와의 연관성 Authors: Kim, Taekyun; Choo, Sung-Ho; Moon, Jae-Hong; Jin, Emilia Kyung; Kim, Daehyuk; Cha, Hyeonsoo Abstract: Since the mid-2010s, a sharp rebound in dense shelf water (DSW) salinity has been observed in the Ross Sea, coinciding with a persistent decline in sea ice around Antarctica. Despite extensive scientific study and significant attention given to these two phenomena due to their potential influence on Earth’s changing climate, a physical link between them has yet to be established. Here, by examining atmospheric circulation in response to shifts in major climate variability modes before and after these dramatic changes, we showed that a combination of large-scale circulation patterns drove both the decline in Antarctic sea ice and the increase in Ross Sea DSW salinity. After the mid-2010s, climate-driven atmospheric circulation generated anomalous northerly winds across much of the high-latitude Southern Ocean. However, the Ross Sea sector uniquely experienced strengthened southerly flow of cold continental air. Consequently, this process led to enhanced sea ice loss around Antarctica through warmer air advection from the north, yet simultaneously, expanded the Ross Sea polynyas, enhancing sea ice formation and contributing to increased Ross Sea DSW salinity. Our findings, therefore, establish a robust linkage between these two Southern Ocean transitions, highlighting their interdependence driven by large-scale climate modes. 2025-10-01T00:00:00Z