Temperature, accumulation, and ice sheet elevation in central Greenland through the last deglacial transition

摘要: We present a combined heat- and ice-flow model, constrained by measurements of temperature in the Greenland Ice Sheet Project 2 (GISP2) borehole GISP2 δ18O record depth-age scale, which determines history temperature, accumulation rate, ice sheet elevation for past 50,000 years central Greenland. Important results are: that increase from average glacial to Holocene conditions was large, approximately 15°C, with 20°C warming late Holocene; rate during last maximum (between 15 30 kyr B. P.) 5.5 7 cm yr−1, 25% modern rate; long-term (500–1000 years) averaged have been inversely correlated most recent millennia probably thickened deglacial transition. The inverse correlation mid suggests is more prone volume reduction warmed climate than previously thought demonstrates not reliable proxy temperature. poorly independent evidence needed. also simple estimate response time thinning interior region an due retreat its margins. This 1900 deglaciation.