Decadal slowdown of a land-terminating sector of the Greenland Ice Sheet despite warming

摘要: Ice flow along land-terminating margins of the Greenland Sheet (GIS) varies considerably in response to fluctuating inputs surface meltwater bed ice sheet. Such lubricate ice-bed interface, transiently speeding up ice. Greater melting results faster motion during summer, but slower over subsequent winter, owing evolution an efficient drainage system that enables water drain from regions ice-sheet have a high basal pressure. However, impact hydrodynamic coupling on decadal timescales remains poorly constrained. Here we show annual across 8,000-km(2) region west GIS margin, extending 1,100 m above sea level, was 12% 2007-14 compared with 1985-94, despite 50% increase production. Our findings suggest that, these three decades, this section ablation zone resulted net slowdown (not speed-up, as previously postulated). Increases production projected climate warming may therefore further reduce GIS. sectors sheet are more resilient dynamic impacts enhanced than thought.