The Characteristics of Significant Wave Height and Sea Surface Temperature In The Sunda Strait

Characteristics of Significant Wave Height and SST

  • Hanah Khoirunnisa
  • Muhammad Zainuddin Lubis Politeknik Negeri Batam
  • Wenang Anurogo Politeknik Negeri Batam
Keywords: Significant wave height, sea surface temperature, Indian Ocean Dipole, spectral analysis

Abstract

Sunda Strait has an important role in the water mass exchange from the Pacific Ocean and the Indian Ocean so that the oceanographic condition is strongly affected by seasonal factors. The purpose of this study is to observe the relationship and the characteristics of significant wave height (SWH) and sea surface temperature (SST) in the Sunda strait and its relationship with IOD. The method employed is spatial analysis, low-pass filter, and spectrum analysis by S-Transform, beside that the correlation between SST and SWH is analyzed by wavelet coherency. The period of SWH and SST is dominantly semiannual, at the time of winter monsoon (the Northeast Monsoon), the SWH was reaching up to 2,11 m, while at the summer monsoon, the SWH was reaching up to 3.62 m. Reversely, the SST increased during the winter monsoon. At the time of 2016 had been detecting by the negative IOD with the IOD index of -0.65 and it caused the SWH increased by 0.3 m than its average. Based on the wavelet coherence, the SWH and the SST have the coherence in the period of 8 to 16 days, especially in March to April, and June to August.

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References

Anoop, T.R., Kumar, V.S., Shanas, P.R. and Johnson, G., 2015. Surface wave climatology and its variability in the North Indian Ocean based on ERA-Interim reanalysis. Journal of Atmospheric and Oceanic Technology, 32(7), pp.1372-1385, doi:10.1175/JTECH-D-14-00212.1
Altunkaynak, A. dan M. Ozger, 2004. Temporal Significant Wave Height Estimation from Wind Speed by Perceptron Kalman Filtering. Ocean Engineering, 31, 1245 – 1255, doi: 10.1016/j.oceaneng.2012.08.005.
Cai, W., Rensch, P., Cowan, T. & Hendon, H. H. An asymmetry in the IOD and ENSO teleconnection pathway and its impact on Australian climate. J. Clim. 25, 6318–6329 (2012), doi: 10.1175/JCLI-D-11-00501.1.
Cochran, W.T., Cooley, J.W., Favin, D.L., Helms, H.D., Kaenel, R.A., Lang, W.W., Maling, G.C., Nelson, D.E., Rader, C.M. and Welch, P.D., 1967. What is the fast Fourier transform?. Proceedings of the IEEE, 55(10), pp.1664-1674.
Carr, P. and Madan, D., 1999. Option valuation using the fast Fourier transform. Journal of computational finance, 2(4), pp.61-73.
Grinsted, A., J. C. Moore, and S. Jevrejeva. 2004. Application of the Cross Wavelet Transform and Wavelet Coherence to Geophysical Time Series. Nonlinear Processes in Geophysics, 11: 561 – 566.
Izaguirre, C., F. J. Méndez, M. Menéndez, and I. J. Losada (2011), Global extreme wave height variability based on satellite data, Geophys. Res. Lett., 38, L10607, doi:10.1029/2011GL047302.
Kumar, U.M., Swain, D., Sasamal, S.K., Reddy, N.N. and Ramanjappa, T., 2015. Validation of SARAL/AltiKa significant wave height and wind speed observations over the North Indian Ocean. Journal of Atmospheric and Solar-Terrestrial Physics, 135, pp.174-180, doi: 10.1016/j.jastp.2015.11.003.
Potemra, J.T., Hacker, P.W., Melnichenko, O. and Maximenko, N., 2016. Satellite estimate of freshwater exchange between the Indonesian Seas and the Indian Ocean via the Sunda Strait. Journal of Geophysical Research: Oceans, 121(7), pp.5098-5111, doi: 10.1002/2015JC011618.
Qiu, Y., Cai, W., Guo, X. and Ng, B., 2014. The asymmetric influence of the positive and negative IOD events on China's rainfall. Scientific reports, 4, p.4943.
Saji, N.H., Goswami, B.N., Vinayachandran, P.N. and Yamagata, T., 1999. A dipole mode in the tropical Indian Ocean. Nature, 401(6751), pp.360-363, doi: 10.1038/43854.
Setiawan, R.Y., Mohtadi, M., Southon, J., Groeneveld, J., Steinke, S. and Hebbeln, D., 2015. The consequences of opening the Sunda Strait on the hydrography of the eastern tropical Indian Ocean. Paleoceanography, 30(10), pp.1358-1372, doi: 10.1002/2015PA002802.
Sprintall, J., Gordon, A.L., Murtugudde, R. and Susanto, R.D., 2000. A semiannual Indian Ocean forced Kelvin wave observed in the Indonesian seas in May 1997. Journal of Geophysical Research: Oceans, 105(C7), pp.17217-17230, doi: 10.1029/2008JC005257.
Susanto, R.D., Wei, Z., Adi, T.R., Zheng, Q., Fang, G., Fan, B., Supangat, A., Agustiadi, T., Li, S., Trenggono, M. and Setiawan, A., 2016. Oceanography Surrounding Krakatau Volcano in the Sunda Strait, Indonesia. Oceanography, 29(2), pp.264-272, doi: 10.5670/oceanog.2016.31.
Tomczak, M., dan J. S. Godfrey. 2001. Regional Oceanography: An Introduction. Permagon. Tarrytown. New York.
Weller, E. & Cai, W. Asymmetry in the IOD and ENSO Teleconnection in a CMIP5 Model Ensemble and Its Relevance to Regional Rainfall. J. Clim. 26, 5139–5149. 10.1175/JCLI-D-12-00789.1 (2013), doi: 10.1175/jcli-d-12-00789.1.
Woo, H.J. and Park, K.A., 2016. Long-term trend of satellite-observed significant wave height and impact on ecosystem in the East/Japan Sea. Deep Sea Research Part II: Topical Studies in Oceanography, doi: 10.1016/j.dsr2.2016.09.003.
Published
2017-06-07

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