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dc.contributor.authorChu, Peter C.
dc.contributor.authorMcDonald, Colleen M
dc.contributor.authorKucukosmanoglu, Murat
dc.contributor.authorJudono, Albert
dc.contributor.authorMargolina, Tetyana
dc.contributor.authorFan, Chenwu
dc.date.accessioned2019-01-10T23:22:38Z
dc.date.available2019-01-10T23:22:38Z
dc.date.issued2018
dc.identifier.citationChu, P.C., C.M. McDonald, M. Kucukosmamnoglu, A. Judono, T. Margolina, and C.W. Fan, 2017: Effect of inter- and intra-annual thermohaline variability on acoustic propagation. Proc. SPIE 10186, Ocean Sensing and Monitoring IX, 101860U (May 22, 2017); doi:10.1117/12.2258687en_US
dc.identifier.urihttp://hdl.handle.net/10945/60915
dc.description.abstractThis paper is to answer the question “How can inter- and intra-annual variability in the ocean be leveraged by the submarine Force?” through quantifying inter- and intra-annual variability in (T, S) fields and in turn underwater acoustic characteristics such as transmission loss, signal excess, and range of detection. The Navy’s Generalized Digital Environmental Model (GDEM) is the climatological monthly mean data and represents mean annual variability. An optimal spectral decomposition method is used to produce a synoptic monthly gridded (SMG) (T, S) dataset for the world oceans with 1o×1o horizontal resolution, 28 vertical levels (surface to 3,000 m depth), monthly time increment from January 1945 to December 2014 now available at the NOAA/NCEI website: http://data.nodc.noaa.gov/cgi- bin/iso?id=gov.noaa.nodc:0140938. The sound velocity decreases from 1945 to 1975 and increases afterwards due to global climate change. Effect of the inter- and intra-annual (T, S) variability on acoustic propagation in the Yellow Sea is investigated using a well-developed acoustic model (Bellhop) in frequencies from 3.5 kHz to 5 kHz with sound velocity profile (SVP) calculated from GDEM and SMG datasets, various bottom types (silty clay, fine sand, gravelly mud, sandy mud, and cobble or gravel) from the NAVOCEANO‘s High Frequency Environmental Algorithms (HFEVA), source and receiver depths. Acoustic propagation ranges are extended drastically due to the inter-annual variability in comparison with the climatological SVP (from GDEM). Submarines’ vulnerability of detection as its depth varies and avoidance of short acoustic range due to inter-annual variability are also discussed.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleEffect of inter- and intra-annual thermohaline variability on acoustic propagationen_US
dc.typeConference Paperen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)en_US
dc.contributor.departmentOceanographyen_US


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