caa a22 4500 605455198 CHVBK 20210128100211.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s10872-014-0259-z doi (NATIONALLICENCE)springer-10.1007/s10872-014-0259-z Amplification of coastal-trapped waves resonantly generated by wind around Sado Island, Japan [Elektronische Daten] [Yosuke Igeta, Keiichi Yamazaki, Tatsuro Watanabe] Current observations were made from 4 July 2009 to 6 March 2011 with an acoustic Doppler current profiler mounted on the seafloor near the northern tip of Sado Island, Japan, and an electromagnetic current meter off the western coast of the island to investigate wind-induced coastal-trapped waves (CTW). Oscillating alongshore flows with a period of about 2days occurred intermittently in association with atmospheric disturbances throughout the observation period. The period of the current fluctuation changed from 48 to 60h in both summer and winter, and the fluctuations were coherent with northward wind velocity fluctuations with a period of about 2days around the island, even though northward wind fluctuations with periods of about 3, 4, and 6days were predominant. Thus, the 2-day-period current fluctuations were selectively enhanced by the wind. Because the wavelength of internal Kelvin waves with a 2-day period was comparable to the distance around Sado Island (210km), we inferred that the wind-induced CTWs around the island were resonant with the 2-day-period northward wind fluctuations. This inference was supported by the results of a numerical experiment performed with a two-layer model using realistic topography, which showed that resonance effectively occurred along the western coast of the island, where the water is deep and the continental shelf is narrow, and the resonance period was controlled by the ocean stratification strength and the shape of the island. The Oceanographic Society of Japan and Springer Japan, 2014 Wind-induced coastal-trapped wave nationallicence Resonance nationallicence Sado island nationallicence Mooring observation nationallicence Numerical experiment nationallicence Igeta Yosuke Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut Yamazaki Keiichi Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut Watanabe Tatsuro Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut Journal of Oceanography Springer Japan 71/1(2015-02-01), 41-51 0916-8370 71:1<41 2015 71 10872 https://doi.org/10.1007/s10872-014-0259-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-014-0259-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Igeta Yosuke Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut NATIONALLICENCE 700 1- Yamazaki Keiichi Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut NATIONALLICENCE 700 1- Watanabe Tatsuro Japan Sea National Fisheries Research Institute, Fisheries Research Agency, 1-5939-22 Suido-cho, Chuo-ku, 951-8121, Niigata-city, Niigata, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/1(2015-02-01), 41-51 0916-8370 71:1<41 2015 71 10872