A flow band model of the Ross Ice Shelf, Antarctica: Response to CO2‐induced climatic warming

摘要: A time-dependent model is applied to the Ross Ice Shelf flow band discharging ice stream B, West Antarctica. The includes effects of temperature, depth-dependent density, and backpressure from coasts embayment Crary Rise. Data Geophysical Glaciological Survey Siple Coast Project are used as input data. Accuracy stability verified by reproducing for 10,000 years with equilibrium distributions accumulation, surface basal balance. Sensitivity tested forcing increasing accumulation rates, temperatures, melt respectively, while other factors held constant. response shelf three climatic scenarios that may result carbon dioxide trace greenhouse gases simulated. results range slight thickening moderately increased in grounding zone rapid thinning accompanied rapidly decreasing during 175- 600-year simulations, depending primarily upon whether temperatures accumulaton rates melting. central shelf, about 400 km upglacier calving front, thins 22% 600 when melting linearlymore » a maximum 0.5 m/yr after 150 years, then steady. 40% 175 at same location increasedlinearly 2.0 present calculated rate melting, averaged over bottom 0.17 m/yr.« less