I., Driesschaert, E., Fichefet, T., Goosse, H. Potential Antarctic ice sheet retreat driven by hydrofracturing and ice cliff failure. et al.) 333–363 (US Global Change Research Program, 2017). in Climate Science Special Report: Fourth National Climate Assessment Vol. Sweet, W., Horton, R., Kopp, R., LeGrande, A. Centennial-scale Holocene climate variations amplified by Antarctic Ice Sheet discharge. Antarctic contribution to meltwater pulse 1A from reduced Southern Ocean overturning. Sensitivity of the Southern Ocean to enhanced regional Antarctic ice sheet meltwater input. Climatic consequences of a pine glacial collapse. Important role for ocean warming and increased ice-shelf melt in Antarctic sea-ice expansion. Global teleconnections in response to freshening over the Antarctic Ocean. Climate modification by future ice sheet changes and consequences for ice sheet mass balance. Vizcaino, M., Mikolajewicz, U., Jungclaus, J. Antarctic ice-sheet melting provides negative feedbacks on future climate warming. Global environmental consequences of twenty-first-century ice-sheet melt. Revisiting Antarctic ice loss due to marine ice-cliff instability. The multi-millennial Antarctic commitment to future sea-level rise. Contribution of Antarctica to past and future sea-level rise. Change in future climate due to Antarctic meltwater. Climate and biogeochemical response to a rapid melting of the West Antarctic Ice Sheet during interglacials and implications for future climate. Our findings document the importance of considering realistic climate–ice sheet–iceberg coupling for future climate and sea-level projections. However, accounting further for the oceanic heat loss due to iceberg melting considerably increases the surface cooling effect and reduces the subsurface temperature feedback amplitude. In agreement with previous studies, the simulated AIS meltwater forcing causes a substantial delay in greenhouse warming in the Southern Hemisphere and activates a transient positive feedback between surface freshening, subsurface warming and ice-sheet/shelf melting, which can last for about 100 years and may contribute to an accelerated ice loss around Antarctica. The iceberg forcing is derived from an ensemble of future simulations conducted using the Penn State ice-sheet model 3. Here we use a coupled climate–iceberg model to determine the climatic effects of combined iceberg latent heat of fusion and freshwater forcing. Recent climate model simulations on the impact of a rapid disintegration of the AIS on climate have applied idealized freshwater forcing scenarios 1, 2 rather than the more realistic iceberg forcing. Future iceberg and meltwater discharge from the Antarctic ice sheet (AIS) could substantially exceed present levels, with strong implications for future climate and sea levels.
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