Secular Changes in the Tidal Amplitude and Influence of Sea-Level Rise in the East China Sea
Akira Tai* and Kaori Tanaka**
*Institute for Advanced Study, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
**Department of Marine System Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
The characteristics of secular changes in M2 tidal amplitude in the East China Sea and the effect of projected sea level rise on tide amplitude were studied. Based on measurement data analysis, it was clarified that rapid sea level rise and M2 tidal amplitude decrease had been observed at observatories that face the East China Sea around 1998. The change in M2 tidal amplitude of the East China Sea by sea level rise was then studied in numerical experiments. And results showed that tidal amplitude increased on the west coast of the Korean Peninsula and the Taiwan Strait. A similar study was conducted for the Yatsushiro Sea and the Ariake Sea, which showed the highest M2 tidal amplitude in Japan. As a result, it was found that M2 tidal amplitude increased in the whole bays, which was against resonance tide theory. It was shown that mean sea level rise and M2 tidal amplitude increase and decrease affected by sea level rise must be considered when predicting the risk of seashore disaster by global warming.
-  IPCC WG I: Climate Change 2007 “The Physical Science Basis,” 2007,
http://www.ipcc.ch/ipccreports/ar4-wg1.htm [accessed February 1, 2013]
-  J.A. Church andN. J. White, “A20th century acceleration in global sea-level rise,” Geophysical Research Letters, Vol.33, L01602, doi:10.1029/2005GL024826, 2006.
-  A. Cazenave and R. S. Nerem, “Present-day sea level change: Observations and causes,” Reviews of Geophysics, Vol.42, RG3001, doi:10.1029/2003RG000139, 2004.
-  IPCC WG II: Climate Change 2007 “Impacts, Adaptation and Vulnerability,” 2007,
http://www.ipcc.ch/ipccreports/ar4-wg2.htm [accessed February 1, 2013]
-  S. Iwasaki, W. Sasaki, and T. Matsuura, “Past Evaluation and Future Projection of Sea level Rise Related to Climate Change Around Japan,” Journal of Disaster Research, Vol.3, No.2, pp. 119-130, 2008.
-  J. E. Hansen, “Scientific reticence and sea level rise,” Environ. Res. Lett., Vol.2, 2007.
-  A. Tai, T. Saita, S. Yano, S. Ogitsuka, and T. Komatsu, “Longterm Global Changes of Oceanic Tidal Amplitudes,” J. JSCE, Ser. B2 (Coastal Engineering), Vol.67, No.2, pp. I 331-I 335, 2011 (in Japanese).
-  P. L. Woodworth, “A survey of recent changes in the main components of the ocean tide,” Continental Shelf Research, Vol.30, pp. 1680-1691, 2010.
-  M. D. Pickering, N. C. Wells, K. J. Horsburgh, and J. A. M. Green, “The impact of future sea-level rise on the European Shelf tides,” Continental Shelf Research, Vol.35, pp. 1-15, 2012.
-  T. Yonetani, “Detection of Long Term Trend, Cyclic Variation and Step-like Change by the Lepage Test,” Journal of the Meteorological Society of Japan, Ser. II, Vol.71, No.3, pp. 415-418, 1993.
-  The Princeton Ocean Model,
http://www.aos.princeton.edu/WWWPUBLIC/htdocs.pom/ [accessed December 10, 2012]
-  Satellite Geodesy,
http://topex.ucsd.edu/index.html [accessed December 15, 2012]
-  Ogura, “The tides in the seas adjacent to Japan,” Bull. Hydr. Dep. Japan, Vol.7, 189pp. with 65 plates, 1933.
-  A. Tai and S. Yano, “Numerical Analysis of Characteristics of Tide and Tidal Current in the Yatsushiro Sea,” Annual Journal of Civil Engineering in the Ocean, JSCE, Vol.23, pp. 603-608, 2007 (in Japanese).
-  Y. Uchiyama, “Modeling wetting and drying scheme based on an extended logarithmic law for a three-dimensional sigma-coordinate coastal ocean model,” Rep. Port and Airport Res. Inst., Yokosuka, Japan, Vol.43, No.4, pp. 3-21, 2004.
-  S. Minobe, “Updated assessments of the 1998/99 climate change over the north Pacific,” In Neo-Science of Natural History: Integration of Geoscience and Biodiversity Studies, Proc. Int. Symp. Mawatari S. F. & Okada H. (Eds.), pp. 103-106, 2002.
-  R. D. Ray and G. T. Mitchum, “Surface manifestation of internal tides in the deep ocean: observations from altimetry and island gauges,” Progress in Oceanography, Vol.40, Issues 1-4, pp. 135-162, 1997.
-  J. A. Colosi and W. Munk, “Tales of the Venerable Honolulu Tide Gauge,” J. Phys. Oceanogr., Vol.36, pp. 967-996, 2006.
-  A. Tai and S. Yano, “Variation ofM2 Tidal Amplification in the Ariake Sea based on Outer Sea Tide, and Influence of the Isahaya Sea-Dyke,” Oceanography in Japan, Vol.17, No.3, pp. 205-211, 2008 (in Japanese with English abstract and captions).