Presentation | C31D: Coupled-System Processes of the Arctic Atmosphere–Sea Ice–Ocean System: Harnessing Field Observations and Advancing Models I Poster
Poster
C31D-0962: Is Temporal Evolution of Seismic Harmonic Tremors Controlled by Sea Ice Extent
Author(s): Dayang Zhou, Pennsylvania State University University Park (First Author, Presenting Author) Gabriel Rocha dos Santos, Pennsylvania State University Tieyuan Zhu, The Pennsylvania State University
To explore whether seismic observations can help monitor sea ice extent, we analyzed two years of geophone data from Utqiaġvik, Alaska. Radar monitoring confirms that when sea ice collides with the shore, it generates seismic events with distinct harmonic patterns. We used seismic methods and machine learning to extract these events and separate them from background noise. The number of detected events closely matches monthly sea ice extent. This work shows that seismic records can help track sea ice interacting with the shore and may even be used to estimate past sea ice extent before satellites were available.
