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http://dx.doi.org/10.7776/ASK.2019.38.6.621

Improvement of the accuracy of XBT based underwater sound speed using the unmanned maritime system and satellite remote sensing data in the Yellow Sea  

Kil, Bum-Jun (한미연합사령부)
Abstract
A logical measure is suggested to estimate an accurate Sound Speed Profile (SSP) for the unusual variation of salinity in the Yellow Sea. Based on National Aeronautics and Space Administration (NASA)'s Aqua and Soil Moisture Active Passive (SMAP) satellite data, this measure identifies the area of temperature inversion effect and expansion of low salinity (<30.5 psu) water. Subsequently, on the area, the Conductivity, Temperature, and Depth (CTD) mounted unmanned maritime system estimates accurate SSP. In order to carry out this measure conveniently, a flow chart is demonstrated in this research. By using this measure which finds the high variational salinity area, the inaccuracy issue for calculating SSP from Expandable Bathy Thermograph (XBT) is expected to be solved.
Keywords
Sound Speed Profile (SSP); Low salinity water; Temperature inversion effect; Conductivity, Temperature, and Depth (CTD); Expandable Bathy Thermograph (XBT);
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Times Cited By KSCI : 2  (Citation Analysis)
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1 R. J. Urick, Principle of Underwater Sound, 3rd Ed. (McGraw-hill Book Company, New York, 1983), pp. 114.
2 S. Lim, "Analysis of differences between the sonic layer depth and the mixed layer depth in the East Sea" (in Korean), J. Korea Inst. Inf. Commun. Eng. 19, 1259-1268 (2015).   DOI
3 What is an Expendable Bathythermograph, or "XBT"?, https://oceanexplorer.noaa.gov/facts/xbt.html/, (Last viewed September 8, 2019).
4 C. D. Tollefsen, "Recommendations for calculating sound speed profiles from field data," Defence R&D Canada - Atlantic, Tech. Rep., 2013.
5 Tutorial: Speed of Sound, https://dosits.org/tutorials/science/tutorial-speed/, (Last viewed January 31, 2019).
6 Calculated Sound Speed, http://turo.com.au/index.php/2-uncategorised/6-calculated-sound-speed/, (Last viewed January 31, 2019).
7 H. J. Lie, C. H. Cho, J. H. Lee, and S. Lee, "Structure and eastward extension of the Changjiang River plume in the East China Sea," J. Geophys. Res. 108, 22 (2003).
8 K. H. Oh, J. H. Lee, S. Lee, and I. C. Pang, "Intrusion of low - salinity water into the Yellow Sea Interior in 2012," Ocean Sci. J. 49, 343-356 (2014).   DOI
9 J. Hao, Y. Chen, and F. Wang, "Temperature inversion in China Seas," J. Geophys. Res. 115, 1-12 (2010).
10 H. J. Lie, C. H. Cho, and K. T. Jung, "Occurrence of large temperature inversion in the thermohaline frontal zone at the Yellow Sea entrance in winter and its relation to advection," J. Geophys. Res. 120, 417-435 (2015).
11 J. Kim, T. Bok, D. Paeng, I. Pang, and C. Lee, "Acoustic channel formation and sound speed variation by low-salinity water in the western sea of Jeju during summer" (in Korean), J. Acoust. Soc. Kr. 32, 1-13 (2013).   DOI
12 S. H. Kim, B. N. Kim, E. Kim, B. K. Choi, and D. S. Kim, "Effects of water temperature inversion layer on underwater sound propagation in the East China Sea," Jpn. J. Appl. Phys. 56, 07JG05 (2017).   DOI
13 Aqua Earth-observing Satellite Mission, https://aqua.nasa.gov/, (Last viewed January 14, 2019).
14 Slocum G3 Glider, http://www.teledynemarine.com/slocum-glider (Last viewed September 8, 2019).
15 H. Medwin, "Speed of sound in water: A simple equation for realistic parameters," J. Acoust. Soc. Am. 58, 1318-1319 (1975).   DOI
16 Argo, http://www.argo.ucsd.edu/, (Last viewed January 14, 2019).
17 T. Meissner, F. Wentz, and A. Manaster, "NASA/RSS SMAP salinity: Version 3.0 validated release," Remote Sensing Systems, Santa Rosa, CA, Tech. Rep., 1-30, 2018.
18 R. Schlitzer, Ocean Data View, http://odv.awi.de/, (Last viewed January 14, 2016).
19 M. M. Zweng, J. R. Reagan, J. I. Antonov, R. A. Locarnini, A. V. Mishonov, T. P. Boyer, H. E. Garcia, O. K. Baranova, D. R. Johnson, D. Seidov, and M. M. Biddle, "World ocean atlas 2013, volume 2: Salinity," S. Levitus, Ed., A. Mishonov Technical Ed.; NOAA Atlas NESDIS, Tech. Rep., 2013.
20 H. Kim, J. Kim, and D. Paeng, "Analysis of surface sound channel by low salinity water and its midfrequency acoustic characteristics in the East China Sea and the Gulf of Guinea" (in Korean), J. Acoust. Soc. Kr. 34, 1-11 (2015).   DOI
21 S. Park and P. C. Chu, "Thermal and haline fronts in the Yellow/East China Seas: surface and subsurface seasonality comparison," J. Oceanogr. 62, 617-638 (2006).   DOI
22 SMAP Soil Moisture Active Passive, https://smap.jpl.nasa.gov/, (Last viewed January 14, 2019).