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We combine radio-echo sounding ice thickness data from the BEDMAP Project database and the PCMEGA (Prince Charles Mountains Expedition of Germany and Australia) dataset to generate a new ice thickness grid for the southern limit region of the Amery Ice Shelf, East Antarctica. We then reassess the mass balance of the central portion of the Lambert-Amery system, incorporating flow information derived from synthetic aperture radar interferometry (InSAR) and a modeled surface massbalance dataset based on regional atmospheric modeling. Our analysis reveals that Mellor and Fisher Glaciers are approximately in balance to the level of our measurement uncertainty, while Lambert Glacier has a positive imbalance of 4.2±2.3 Gt a-1. The mass budget for the whole Lambert Glacier basin is approximately in balance, and the average basal melt rate in the downstream section of the ice shelf is 5.1±3.0ma-1. Our results differ substantially from other recent estimates using hydrostatically derived ice thickness data. [ABSTRACT FROM AUTHOR]

The article discusses the study on the impact of global climate change on the spatial distributions of the basal melting and freezing at the Amery Ice Shelf in East Antartica. It examines the surface elevation and accumulation rate datasets of the ice velocity along with a column-averaged ice density model and hydrographic observations. It estimates the net melt over the ice-shelf base is which is higher than previous modeling and oceanographic estimates. It notes that the net basal melting accounts for about half of the total ice-shelf mass loss and from the iceberg discharge. It adds that the basal melting and freezing distribution map has provided a scientific basis for quantitative analysis of ice and ocean interaction at the ice-shelf and ocean interface.