Arctic Underwater Ambient Soundscapes: Understanding Sources and Quantifying Signals
Abstract
The proposed work focuses on ambient soundscapes in Arctic coastal environments. Two motivations drive the work proposed here: 1. The operation of underwater acoustic technology in the Arctic region is imperative for the interests of national security and an understanding of the UW soundscape is essential for the reliable operation of this equipment, and 2. The underwater soundscape contains information about the changing Arctic climate through the sounds generated by ice ocean interactions. In contrast to soundscapes in the open ocean, relatively little is known about ambient sound in coastal regions in the Arctic. Similarly, little has been done tocharacterize underwater acoustic propagation around marine-terminating glaciers, where sound speed profiles are complicated by the mixing of fresh, glacier meltwater with tidally driven seawater flows. Meltwater drives the formation of seasonally-variable, freshwater lenses, which create transient and variable waveguides near the sea surface. The proposed work leverages advances in our current understanding of the underwater soundscape in coastal Arctic regions to improve our understanding of the sources of sound and quantifying them for geophysical signals, such as ice melting and calving. Geophysical signals such as these are critical to understanding the impact of climate shifts on oceanic freshwater inputs and sea level rise.This abstract is publicly releasable.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 08, 2024
- Source ID
- N000142412394
Entities
People
- Grant B Deane
Organizations
- Office of Naval Research
- United States Navy
- University of California, San Diego