2023_programme: Using an Earth System Model to estimate ocean acoustic propagation in a rapidly-evolving Arctic

• Session: 01. Acoustics in polar environments
  Organiser(s): Jaroslaw Tegowski, Philippe Blondel and Hanne Sagen
• Lecture: Using an Earth System Model to estimate ocean acoustic propagation in a rapidly-evolving Arctic
  Paper ID: 2090
  Author(s): Niklasson Siobhan, Veneziani Milena, Rowe Charlotte, Price Stephen, Roberts Andrew, Worcester Peter, Dzieciuch Matthew, Bilek Susan
  Presenter: Niklasson Siobhan
  Abstract: The Arctic Ocean is warming rapidly. The hydroacoustic environment will be impacted by the changing thermohaline structure, increased marine traffic, changes in sea ice coverage, and possible increases in microseism/storm noise. Current ocean acoustic models must be updated to reflect new and changing conditions. A sophisticated way to make predictions is using decadal to centennial integrations of fully coupled Earth system models (ESMs). At Los Alamos National Laboratory (LANL), we are working to develop the Department of Energy’s (DOE) Energy Exascale Earth System Model (E3SM), capable of driving an acoustics model in a rapidly-evolving Arctic Ocean.\nHere we analyze E3SM simulations to investigate how well we currently capture hydrological properties for the upper 1000 m of the Arctic water column, including changes that could impact acoustic wave propagation. We present results of model validation against available temperature and salinity measurements. The goals of this effort are to provide boundary ocean conditions to the acoustic model, to enable quantification of the ocean acoustic implications of climate change as well as create a climate-aware atlas of global acoustic noise and propagation adjustments for non-proliferation signal detection.
• Corresponding author: Ms Siobhan Niklasson
  Affiliation: Los Alamos National Laboratory
  Country: United States
  e-mail: