fnctId=thesis,fnctNo=414
Seawater oxygen isotopes as a tool for monitoring future meltwater from the Antarctic ice-sheet
- 작성자
- 기후시스템전공
- 저자
- Hyuna Kim & Axel Timmermann
- 발행사항
- 발행일
- 2024-06-22
- 저널명
- Communications Earth & Environment
- 국문초록
- 영문초록
- To reduce uncertainties in future sea level projections, it is necessary to closely monitor the evolution of the Antarctic ice-sheet. Here, we show that seawater oxygen isotopes are an effective tool to monitor ice-sheet freshwater discharge and its contributions to sea level rise. Using the isotope-enabled Community Earth System Model with imposed estimates of future meltwater fluxes, we find that the anthropogenic ice-sheet signal in water isotopes emerges above natural variability decades earlier than salinity-based estimates. The superiority of seawater isotopes over salinity in detecting the ice-sheet melting can be attributed to the higher signal-to-noise ratio of the former and the fact that future sea ice changes only contribute little to seawater isotopes but a lot to salinity. We conclude that in particular in the Ross Sea sector, continuous seawater oxygen isotope measurements could serve as an early warning system for rapid anthropogenic Antarctic ice-sheet mass loss.
- 일반텍스트