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A Study on the Long-Term Variations of Annual Maximum Surge Heights at Sokcho and Mukho Harbors  

Kwon, Seok-Jae (Ocean Research Lab., National Oceanographic Research Institute)
Moon, Il-Ju (College of Ocean Science/Ocean and Environment Research Institute, Cheju National University)
Lee, Eun-Il (Ocean Research Lab., National Oceanographic Research Institute)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.20, no.6, 2008 , pp. 564-574 More about this Journal
Abstract
This study investigates a long-term variation of annual maximum surge heights(AMSH) and main characteristics of high surge events, which is influenced by the global warming and intensifying typhoons, using sea level data at Sokcho and Mukho tidal stations over 34 years ($1974{\sim}2007$). It is found that the there is a longterm uptrend of the AMSH at Sokcho (8.3 cm/34yrs) and at Mukho (8.7 cm/34yrs), which is significant within 95% confidence level based on the linear regression. The statistical analysis reveals that 53% of the AMSH occurs during typhoon's event in both tidal stations and the highest surge records are mostly produced by the typhoon. It is concluded that the uptrend in the AMSH is attributed by the increasing typhoon activities globally as well as locally in Korea due to the increased sea surface temperature in tropical oceans. The continuous efforts monitering and predicting the extreme surge events in the future warm environments are required to prevent the growing storm surge damage by the intensified typhoon.
Keywords
global warming; tides; sea level; surge level; sea surface temperature; power dissipation index;
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Times Cited By KSCI : 2  (Citation Analysis)
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