Analysis of South China Sea Shelf and Basin Acoustic Transmission Data
Abstract
My long-term research goals are: (1) The characterization, understanding, and prediction of the statistics (mean, variance and coherence) of low-frequency acoustic signals and ambient noise in the littoral zone. The signal statistics are primarily influenced by the ocean variability and bottom properties. The noise statistics are influenced by atmospheric forcing and shipping in addition to the ocean and bottom variability. (2) The development and improvement of inverse techniques for measuring the dynamics and kinematics of meso and finer-scale sound speed structure and ocean currents in coastal regions. (3) The understanding of three-dimensional sound propagation physics including horizontal refraction and azimuthal coupling and the quantification of the importance of these complex physics in the prediction of sound signals transmitted over highly variable littoral regions. This is a three-year (2009-2011) project to complete the analysis of both the shelf and basin acoustic data collected from the Northeastern South China Sea (NE SCS) during the Windy Island Soliton Experiment (WISE). These data were collected between April 2005 and October 2006. The objectives of the basin acoustic data analysis are twofold: The first is to study and characterize the supertidal-to-seasonal-scale impacts of the transbasin nonlinear internal waves on long-range transmission loss. The second is to understand and quantify the variability of the observed ambient noise level in the basin. The second objective constitutes the primary focus of my data analysis effort in FY10.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542141
Entities
People
- Chingsang Chiu
Organizations
- Naval Postgraduate School