6C (2024-2024): Listening for sediment transport and river ice dynamics in Arctic Rivers - Year 2

• University of New Mexico

The Arctic region is experiencing accelerated temperature increases, which has been driving increased rates of permafrost thaw and causing changes in the physical and chemical dynamics of Arctic landscapes. One such change is in the timing and magnitude of spring river ice breakup and flooding. It is difficult to observe river ice breakup in remote Alaskan rivers, and even more difficult to collect samples of river bedload and suspended load during ice breakup events. Building on a geophysical dataset collected on the Canning River in summer 2023, we deployed three geophones during river ice breakup and continuously recorded the signals generated by river ice breakup and river discharge rise in the Canning River, Alaska during this dynamic period. We deployed three SmartSolo geophones (IGU-16HR 3C Multi Channel Data Loggers) on an elevated floodplain surface at 20, 30, and 40 m from the bank of the Canning River from 28 May through 24 June 2024. Unfortunately, only two nodes were recovered (stations 2 and 3 at 30 and 40 m from the river bank, respectively). Using the recorded geophone data, we will work to translate the seismic signals into river ice movement, bedload sediment transport, and stage height changes. These data will provide key information on the timing and driving mechanisms of river bank erosion, soil carbon loss, and sediment transport rates in changing Arctic river systems.

FDSN Web Services provide a common data access API for seismic data.

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