Development of a low frequency ambient noise storm model for the Arctic Ocean
By: David A. Collins
Publisher: Naval Postgraduate School; Available from National Technical Information Service
Published: 1996
Place of publication: Monterey, Calif; Springfield, Va
Language: eng
Number of pages: 136
Description: The development of an ambient noise model for use in ice-covered Arctic waters is the      primary goal of this research. The generation of ambient noise is considered to originate from      large scale deformation of the ice cover (pressure ridge formation) which is caused on a      synoptic scale by convergence of the ice cover due to wind stress/speed associated with the      passage of Arctic storms. The Arctic Storm Noise Model (ASNM) has been developed as a      dynamic model to predict the occurrence of extreme noise events. The emphasis is on      accurately predicting the large increases or decreases in ambient noise, which observations      have shown to be in the order of 20 to 30 dB over a matter of hours. ASNM was adapted      from the Ambient Noise Directional Estimation System (ANDES) for use under the Arctic      pack ice. ASNM predictions are compared quantitatively to noise measurements made by      ice-mounted drifting buoys in the Arctic basin during the early 1990's. Results showed that for      extreme events (<5th or >95th percentile) ASNM is accurate in predicting both the level of      ambient noise and the large increases in the noise record. Due to the encouraging results      further improvements are recommended to increase the robustness of the model for potential      tactical use by submarine units operating under the Arctic pack ice.
Notes: Thesis advisor(s): Robert H. Bourke,  James H. Wilson.

"December 1996."

Thesis (M.S. in Physical Oceanography) Naval Postgraduate School, December 1996.

Includes bibliographical references (p. 131-132)

Approved for public release; distribution unlimited.

Also available online.

Mode of access: World Wide Web.

System requirements: Adobe Acrobat Reader.

British Navy author.

dk/dk cc:9116 5/14/97