从太空绘制南极冰下中尺度地貌

POlaR scieNce Complex mesoscale landscapes beneath Antarctica mapped from space Helen Ockenden1,2*, Robert G. Bingham2*, Daniel Goldberg2, Andrew Curtis2, Mathieu Morlighem3 The landscape shrouded by the antarctic Ice Sheet provides important insights into its history and influences the ice response to climate forcing. However, knowledge of this critical boundary has depended on interpolation between irregularly distributed geophysical surveys, creating major spatial biases in maps of antarctica’s subglacial landscape. as stress changes associated with ice flow over bedrock obstacles produce ice surface topography, recently acquired, high- resolution satellite maps of the ice surface offer a transformative basis for mapping subglacial landforms. …