U.S. Navy sources and receivers for studying acoustic propagation and climate change in the ocean.

Sounds from a U.S. Navy SSQ-110A source are received at high signal-to-noise ratios at ocean-basin scales at two Sound Surveillance Systems in the Pacific. The sounds have sufficient pulse resolution to study climatic variations of temperature. The acoustic data can be understood using ray and parabolic approximations to the wave equation. Modeled internal waves decrease pulse resolution from 0.01 to 0.1 s, consistent with observations. Comments Copyright ASA. Reprinted from Journal of the Acoustical Society of America, Volume 114, Issue 5, November 2003, pages 2557-2560 . Publisher URL: http://dx.doi.org/10.1121/1.1619983 This journal article is available at ScholarlyCommons: http://repository.upenn.edu/ees_papers/8 U.S. Navy sources and receivers for studying acoustic propagation and climate change in the ocean (L) John L. Spiesberger Department of Earth and Environmental Science, 240 South 33rd Street, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6316 ~Received 13 February 2003; revised 24 July 2003; accepted 25 August 2003! Sounds from a U.S. Navy SSQ-110A source are received at high signal-to-noise ratios at ocean-basin scales at two Sound Surveillance Systems in the Pacific. The sounds have sufficient pulse resolution to study climatic variations of temperature. The acoustic data can be understood using ray and parabolic approximations to the wave equation. Modeled internal waves decrease pulse resolution from 0.01 to 0.1 s, consistent with observations. © 2003 Acoustical Society of America. @DOI: 10.1121/1.1619983# PACS numbers: 43.30.Qd, 43.30.Re, 43.30.Pc @RAS# Pages: 2557–2560