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Using Distributed Acoustic and Temperature Sensing to Characterize the Rapidly Changing Nearshore Arctic Ocean (Pemdats)

Description: 

The Arctic is outpacing the rest of the world in its response to climate change. Distributed fiber optic sensing (DFOS) data is increasingly being used to characterize nearshore oceanographic processes from the seabed to the sea surface. For the first time we will be demonstrating the use of both distributed acoustic and temperature sensing data to characterize the nearshore Arctic seismic seabed structure. The PEMDATS project will acquire both unconventional and traditional acoustic signals, in addition to seabed temperature, along ~35 km of commercial dark fiber cable that extends offshore from Oliktok Point, Alaska into the Beaufort Sea. Our main goal is to assess the potential for using DFOS to map the evolution of degrading permafrost, associated gas hydrate deposits, and seafloor seeps. Acquiring colocated acoustic and temperature information creates a unique data set that allows us to image the seabed in multi-physical dimensionality across all seasons. Remote operation of this data acquisition system provides a use case that brings together new sensing modalities under climate relevant applications. We will show initial DAS and DTS data and processing results that set the stage for the upcoming characterization of the nearshore submarine permafrost and seabed structure. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.

Session: Monitoring Climate Change With Seismology [Poster]

Type: Poster

Date: 4/18/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: A. Christian Stanciu

Student Presenter: No

Invited Presentation: 

Authors