Terminating the 100 kyr ice age cycle

摘要: We report a simulation of the most recent 100,000-year glaciationdeglaciation cycle late Pleistocene ice age, that delivers an sheet chronology is in close accord with inferred from geological record. Our analyses are performed reduced model climate system incorporates significant improvements to representation both forcing and mass balance response previously described theory based upon coupled one-level energy (EBM) vertically integrated (ISM). The fully influences orbital insolation forcing, glacial isostatic adjustment variations atmospheric concentrations greenhouse gases. It correctly predicts main geographical regions northern hemisphere were glaciated at last maximum 21,000 years ago as well abrupt termination epoch occurred subsequently. latter feature age obtained without need incorporate unconstrained therefore controversial physical processes into model, limitation all previous attempts understand this global scale cycle. suggest radiative impact on surface glaciation due changing concentration CO2 Is critical ability deliver synthetic history deglaciation inferences geomorphological evidence. With incorporation influence, model-predicted thickness distributions (LGM) very similar those recently ICE-4G reconstruction was inversion postglacial relative sea level histories.