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We present a 1000 km transect of Autonomous phase-sensitive Radio Echo Sounding (ApRES) measurements of ice thickness, basal reflection strength, basal melting, and ice-column deformation across the Ross Ice Shelf (RIS). Measurements were gathered over five seasons (2015-2020), two seasons along the full transect connecting the grounding line with the distant ice shelf front. ApRES identifies regions with varying basal reflection strength showcasing a variety of basal conditions influenced by upstream glacial processes and the interaction of different water masses. The mean basal melt rate was 0.099 ± 0.013 m a-1; the central RIS experienced negligible melt, with weak basal reflections, likely driven by basal debris and marine ice. Strong reflections in the northern and southern regions correlate with higher basal melt, rising to 0.285 ± 0.034 m a-1 in the vicinity of the south western grounding lines, and to 0.468 ± 0.020 m a-1 towards the calving front. Basal melt rates on the Siple Coast are low between 0.002 ± 0.011 m a-1 and 0.040 ± 0.003 m a-1 but increase to 0.145 ± 0.011 m a-1 within 8 km of the Kamb Ice Stream grounding line.

本数据集展示了跨越罗斯冰架（RIS）的1000公里测线，包含自主相位敏感无线电回声测深（ApRES）对冰层厚度、底部反射强度、底部融化和冰柱形变的测量数据。这些数据跨越了五个季节（2015-2020年），其中两个季节的测量覆盖了从冰架前沿到冰川前沿的整个测线。ApRES技术能够识别出底部反射强度不同的区域，这些区域展现了受上游冰川过程及不同水团相互作用影响的多样化底部条件。平均底部融化速率为0.099 ± 0.013米/年；中央罗斯冰架的融化量微乎其微，底部反射较弱，这可能是由于底部碎屑和海洋冰的影响。北部和南部的强烈反射与较高的底部融化速率相关，南部西侧冰川前沿附近达到0.285 ± 0.034米/年，而向冰川前沿方向则增至0.468 ± 0.020米/年。斯皮尔海岸的底部融化速率介于0.002 ± 0.011米/年和0.040 ± 0.003米/年之间，但在距离坎贝尔冰川前沿线8公里以内增至0.145 ± 0.011米/年。