JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Investigating the Adjustment Methods of Monthly Variability in Tidal Current Harmonic Constants
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Ocean and Polar Research
  • Volume 33, Issue 3,  2011, pp.309-319
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2011.33.3.309
 Title & Authors
Investigating the Adjustment Methods of Monthly Variability in Tidal Current Harmonic Constants
Byun, Do-Seong;
  PDF(new window)
 Abstract
This is a preliminary study of the feasibility of obtaining reliable tidal current harmonic constants, using one month of current observations, to verify the accuracy of a tidal model. An inference method is commonly used to separate out the tidal harmonic constituents when the available data spans less than a synodic period. In contrast to tidal constituents, studies of the separation of tidal-current harmonics are rare, basically due to a dearth of the long-term observation data needed for such experiments. We conducted concurrent and monthly harmonic analyses for tidal current velocities and heights, using 2 years (2006 and 2007) of current and sea-level records obtained from the Tidal Current Signal Station located in the narrow waterway in front of Incheon Lock, Korea. Firstly, the l-year harmonic analyses showed that, with the exception of and semidiurnal constituents, the major constituents were different for the tidal currents and heights. , for instance, was found to be the 4th major tidal constituent but not an important tidal current constituent. Secondly, we examined monthly variation in the amplitudes and phase-lags of the and current-velocity and tide constituents over a 23-month period. The resultant patterns of variation in the amplitudes and phase-lags of the tidal currents and tides were similar, exhibiting a sine curve form with a 6-month period. Similarly, variation in the tidal constant and tidal current-velocity phase lags showed a sine curve pattern with a 6-month period. However, that of the tidal current-velocity amplitude showed a somewhat irregular sine curve pattern. Lastly, we investigated and tested the inference methods available for separating the and current-velocity constituents via monthly harmonic analysis. We compared the effects of reduction in monthly variability in tidal harmonic constants of the current-velocity constituent using three different inference methods and that of Schureman (1976). Specifically, to separate out the two constituents ( and ), we used three different inference parameter (i.e. amplitude ratio and phase-lag diggerence) values derived from the 1-year harmonic analyses of current-velocities and tidal heights at (near) the short-term observation station and from tidal potential (TP), together with Schureman's (1976) inference (SI). Results from these four different methods reveal that TP and SI are satisfactorily applicable where results of long-term harmonic analysis are not available. We also discussed how to further reduce the monthly variability in tidal current-velocity constants.
 Keywords
tidal current harmonic analysis;current observation;inference method;Incheon Lock;
 Language
Korean
 Cited by
1.
Tidal Current Energy Resources off the South and West Coasts of Korea: Preliminary Observation-Derived Estimates, Energies, 2013, 6, 2, 566  crossref(new windwow)
2.
Predicting Tidal Heights for New Locations Using 25 h of in situ Sea Level Observations plus Reference Site Records: A Complete Tidal Species Modulation with Tidal Constant Corrections, Journal of Atmospheric and Oceanic Technology, 2015, 32, 2, 350  crossref(new windwow)
 References
1.
국립해양조사원(2010a)조석보정시스템 개선 연구: 현황파악 및 개선방향 제시. 국립해양조사원, 166 p

2.
국립해양조사원 (2010b) 조류에너지 자원도 개발 연구(I): 관측유속 기반. 국립해양조사원, 591 p

3.
Adalgeirsdottir G, Smith AM, Murray T, King MA, Makinson K, Nicholls KW, Behar AE (2008) Tidal influence on Rutford Ice Stream, West Antarctica: observations of surface flow and basal processes from closely spaced GPS and passive seismic stations. J Glaciol 54:715-724 crossref(new window)

4.
Bell C, Vassie JM, Woodworth PL (1999) POL/PSMSL Tidal Analysis Software Kit 2000 (TASK-2000). Permanent Service for Mean Sea Level, CCMS Proudman Oceanographic Laboratory, Bidston Observatory, Birkenhead, UK, 20 p

5.
Boon JD (2004) Secrets of the tide: tide and tidal current analysis and applications, storm surges and sea level trends. Horwood Publishing, 212 p

6.
Byun DS, Cho CW (2009) Exploring conventional tidal prediction schemes for improved coastal numerical forecast modeling. Ocean Model 28:193-202 crossref(new window)

7.
Cai S, Long X, Liu H, Wang S (2006) Tide model evaluation under different conditions. Cont Shelf Res 26:104-112 crossref(new window)

8.
Emery WJ, Thomson RE (2001) Data Analysis Methods in Physical Oceanography (second and revised edition). Elsevier Science, 638 p

9.
Fang G, Yang J (1988) Modeling and prediction of tidal currents in the Korea Strait. Prog Oceanogr 21:307-318 crossref(new window)

10.
Foreman MGG (1977) Manual for Tidal Heights Analysis and Prediction. Pacific Marine Science Report 77-10, Institute of Ocean Sciences, Patricia Bay, Sidney, 58 p

11.
Foreman MGG (1978) Manual for Tidal Currents Analysis and Prediction. Pacific Marine Science Report 78-6, Institute of Ocean Sciences, Patricia Bay, Sidney, 57 p

12.
Foreman MGG, Crawford WR, Marsden RF (1995) Detiding: theory and practice. In: Lynch DR, Davies AM (eds) Quantitative Skill Assessment for Coastal Ocean Models. Coast Estuar Stud 47:203-239 crossref(new window)

13.
Godin (1972) The analysis of tides. University of Liverpool Press, 212 p

14.
Lee SH, Kim K (1988) Variations of the Diurnal Tides around Jeju-Do. J Ocean Soc Korea 23:62-69

15.
Pawlowicz R, Beardsley B, Lentz S (2002) Classical Tidal Harmonic Analysis including Error Estimates in MATLAB using T_TIDE. Comput Geo Sci 28:929-937 crossref(new window)

16.
Pugh DT (1987) Tides, Surges and Mean Sea-Level. John Wiley & Sons, Chichester, 472 p

17.
Schureman P (1976) Manual of Harmonic Analysis and Prediction of Tides. Coast and Geodetic Survey, Washington DC, 317 p