The Ross Ice Shelf (RIS) is the world's largest ice shelf. It is hundreds of meters thick, with width and length many hundreds of kilometers and covering the majority of the Ross Sea bay (Figure 1a). Two sets of seminal experiments have been made on the RIS over the past two decades to measure its vibrational response to ocean surface wave forcing, ranging from swell (roughly frequencies 0.03-0.1 Hz or periods 10-30 s) to infragravity (IG) waves (0.003-0.02 Hz or 50-300 s) to very long period waves including tsunamis (0.001-0.003 Hz or 300-1,000 s). Interest in ocean wave-ice shelf interactions derives from a series of classic theoretical studies that argue wave-induced flexure of ice shelves (and ice tongues) has the capacity to create or enhance near-shelffront ice fractures, crevasses and rifts, and

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