Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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A Study on the Distribution of Summer Water Temperature in Wando Using Time-Series Analysis and Numerical Experiments

시계열 분석 및 수치실험을 통한 완도의 하계 수온분포

  • Jang, Chan-Il (Interdisciplinary Program of Ocean Industrial Engineering, Pukyong National University) ;
  • Jeong, Da-Woon (Interdisciplinary Program of Ocean Industrial Engineering, Pukyong National University) ;
  • Kim, Dong-Sun (Department of Ecological Engineering, Pukyong National University)
  • 장찬일 (부경대학교 해양산업공학(협)) ;
  • 정다운 (부경대학교 해양산업공학(협)) ;
  • 김동선 (부경대학교 생태공학과)
  • Received : 2018.02.12
  • Accepted : 2018.04.27
  • Published : 2018.04.30
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Abstract

Time series analysis was conducted to identify the factors affecting short-term variation of water temperature in Wando. Spectrum analysis showed that air temperature peaks at diurnal period, while water temperature and tide level peak at both semi-diurnal and diurnal periods. Coherence between water temperature and the tide level presented 0.92 at semi-diurnal period. Numerical experiment were carried out to understand the spatio-temporal distribution of water temperature in the study area. Average water temperature difference between maximum ebb and flood was $0.3^{\circ}C$ in spring tide, but $0.13^{\circ}C$ in neap tide. The reason for the large difference in spring tide is that relatively cold water entered with strong tidal currents at flood tide and flowed out at ebb tide. Water temperature on coasts was higher than out at sea. This is because the depth in the coast is shallower than at sea, and water temperature increases rapidly due to solar radiation.

본 연구에서는 완도 해역에서 단기적인 수온의 변화에 영향을 주는 요인을 파악하기 위하여 시계열 분석을 실시하였다. Power spectrum 결과에서 기온은 약 24 hr에서 peak를 보였으나 수온과 조위는 약 12 hr 및 24 hr에서 peak가 나타났다. 수온과 조위의 상관성을 파악하기 위해 coherence 분석을 실시한 결과, 두 변수는 반일주기에서 0.92로 높은 상관성을 보였다. 또한 수온의 시 공간적인 분포를 파악하기 위하여 수치실험을 실시하였다. 대조기에는 최강 낙조와 최강 창조 시의 평균 수온차가 $0.3^{\circ}C$인 반면, 소조기에는 평균 수온차가 $0.13^{\circ}C$로 작았다. 대조기의 수온차가 큰 이유는 비교적 수온이 낮은 외해수가 강한 조류에 의해 창조 시 유입되고 낙조 시 빠져나가기 때문인 것으로 판단된다. 전반적으로 수온은 외해보다 연안에서 높게 나타났다. 외해보다 연안은 수심이 얕기 때문에 일사량에 의해 수온이 빠르게 증가하기 때문인 것으로 사료된다.

Keywords

References

  1. Bayne, B. L, D. A. Brown, K. Burns, D. R. Dixon, A. Ivanovici, D. R. Livingstone, D. M. Lowe, M. N. Moore, A. R. D. Stebbing and J. Widdows(1985), The effects of stress and pollution on marine animals (Praeger special studies). Praeger Scientific, Westport, C.T., p. 9.
  2. Cho, E. S., S. S. Kim, S. Y. Lee, H. D. Jeong and S. Y. Kim(2009), Marine Environmental Characteristics in Western Coastal Water of the South Sea of Korea, J. of the Korean Society of Marine Environment & Safety, 15(3), pp. 187-203.
  3. Cho, H. Y. and B. J. Koo(2008), Water Temperature and Salinity Variation Analysis in the Inter-Tidal Zone, South of Ganghwado, Korea, J. Korean Society of Coastal and Ocean Engineers, Vol. 20, No. 3, pp. 310-320.
  4. Choi, Y. H., Y. J. Ro and H. K. Jun(2002), Variability of Seawater Temperature in the Coastal Water off the Dangjin Power Plant, Asan Bay, Korea, J. Korean Soc. Oceanography, 7(2), pp. 43-50.
  5. Choo, H. S., G. H. Lee and Y. H. Yoon(1997), Variations of Temperature and Salinity in Kugum Suro Channel, J. Korean Fish, Soc., 30(2), pp. 252-263.
  6. Emery, W. J. and R. E. Thomson(1998), Data Analysis Methods in Physical Oceanography. Pergamon Press, pp. 468-487.
  7. KHOA(1995), Korea Hydrographic and Oceanographic Agency, Tidal Current Charts(Yeosu to Wando). pp. 7-8.
  8. Lee, C. I., J. H. Lee and D. S. Kim(2007), Effects of Meteorological Factors on Water Temperature, Salinity in the West Sea of Korea, Journal of the Korean Society of Marine Environment & Safety, 13(1), pp. 29-37.
  9. Lee, J. C., H. S. Choo, K. H. Lee and K. D. Cho(1995), Tides and Currents of Kamag Bay in July-August 1994, J. Korean Fish. Soc. 28(5), pp. 624-634.
  10. Min, H. S. and C. H. Kim(2006), Interannual Variability and Long-term Trend of Coastal Sea Surface Temperature in Korea, Ocean and Polar Research, Vol. 28(4), pp. 415-423. https://doi.org/10.4217/OPR.2006.28.4.415
  11. NFRDI(2008), National Fisheries Research and Development Institute, Standard Manual of Abalone Culture, Retrieved from http://portal.nfrdi.re.kr/upload/farm/farm_03.pdf, p. 93.
  12. Seong, K. T., J. D. Hwang, I. S. Han, W. J. Go, Y. S. Suh and J. Y. Lee(2010), Characteristic for Long-term Trends of Temperature in the Korean Waters, J. Korean Society of Marine Environment & Safety, 16(4), pp. 353-360.
  13. Suh, Y. S., L. H. Jang and H. G. Kim(2003), Relationships between Spatio-temporal Distribution of Cochlodinium polykrikoides Red Tide and Meso-scale Variation of Oceanographic Environment around the Korean Water, J. Kor. Associ. Geographic Information. Stud., 6(3), pp. 139-150.
  14. Zhang, C. I., J. B. Lee, S. Kim and J. H. Oh(2000), Climatic regime shifts and their impacts on marine ecosystem and fisheries resources in Korean waters. Progress in Oceanography, 47, pp. 171-190. https://doi.org/10.1016/S0079-6611(00)00035-5

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