Category of contribution: Solid Earth geophysics validation of global ocean tide models using the Superconducting gravimeter data at Syowa Station, Antarctica, and in-situ tide gauge and bottom-pressure observations
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概要
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We performed a validation study of six ocean tide models (CSR4.0, GOT99.2b, NAO.99b, FES2004, TPXO7.1, and TPXO7.2) using superconducting gravity data recorded at Syowa Station. From comparison with the observed loading effects, the most optimum ocean tide model was found to be TPXO7.2, which had a combined root-mean-square (RMS) misfit of 0.194 μGal for the eight major (four diurnal and four semidiurnal) waves. The next best ocean tide model was NAO.99b, with a combined misfit of 0.277 μGal. To determine the effect of inclusion of regional tide gauge and bottom-pressure data around Syowa Station, we estimated the combined RMS error for all eight waves; incorporation of these regional data into the TPXO7.2 model resulted in a 5% reduction in the misfit. Our phase lag anomalies indicate that the scatter of the out-phase component was greater than that of the in-phase component in the final residuals; this tendency was especially clear for O1, K1 and M2 waves. Improvement of the phase differences was the key to determine the optimum ocean tide model.
著者
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Doi Koichiro
National Institute of Polar Research, Sokendai, Midori-cho 10-3, Tachikawa-city, Tokyo 190-8518, Jap
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Shibuya Kazuo
National Institute of Polar Research, Sokendai, Midori-cho 10-3, Tachikawa-city, Tokyo 190-8518, Jap
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Aoyama Yuichi
National Institute of Polar Research, Research Organization of Information and Systems, 10-3, Midori
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Shibuya Kazuo
National Inst. Of Polar Res. And Graduate Univ. For Advanced Studies (sokendai) 1-9-10 Kaga Itabashi
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Kim Tae-Hee
Department of Obstetrics and Gynecology, College of Medicine, Sooncheonhyang University
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Kim Tae-hee
Department Of Polar Science The Graduate University For Advanced Studies (sokendai) 10-3 Midori-cho
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Kim Tae-hee
Department Of Food Science And Nutrition Catholic University Of Daegu
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Doi Koichiro
National Institute Of Polar Research
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Doi Koichiro
National Institute Of Polar Research 10-3 Midori-cho Tachikawa Tokyo Japan
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Shibuya Kazuo
National Institute Of Polar Research 10-3 Midori-cho Tachikawa Tokyo Japan
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Aoyama Yuichi
National Institute Of Polar Research 10-3 Midori-cho Tachikawa Tokyo Japan
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Aoyama Yuichi
National Institute Of Polar Research
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Hayakawa Hideaki
National Institute of Polar Research, 10-3 Midori-cho, Tachikawa, Tokyo, Japan
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Hayakawa Hideaki
National Institute Of Polar Research 10-3 Midori-cho Tachikawa Tokyo Japan
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