Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Long-term Variation in Ocean Environmental Conditions of the Northern East China Sea

동중국해 북부해역의 해양환경 장기변동

  • 윤상철 (국립수산과학원 수산해양종합정보과) ;
  • 윤석현 (국립수산과학원 수산해양종합정보과) ;
  • 황재동 (국립수산과학원 수산해양종합정보과) ;
  • 서영상 (국립수산과학원 수산해양종합정보과) ;
  • 윤이용 (가톨릭관동대학교 공과대학 보건환경학과)
  • Received : 2015.07.06
  • Accepted : 2015.08.06
  • Published : 2015.08.25
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Abstract

The present study was conducted to investigate the oceanic characteristics of the northern East China Sea through identification of long-term variation patterns of oceanic environment factors, for the objective of gaining understanding of oceanic environment characteristics of the northern waters of East China Sea, which closely influence the oceanic environments of waters nearby South Korea. The study methodology included the use of oceanographic data (water temperature, salinity, dissolved oxygen, nutrients, and chlorophyll-a) on the northern East China Sea from the Korea Oceanographic Data Center (KODC), collected by season for 20 years between 1995 and 2014. Moreover, for the study on the distribution of nutrients, chlorophyll-a. The main water masses that affected the northern East China Sea during the study period were classified as Changjiang diluted water (CDW), Tiawan current warm water (TCWW), Yellow Sea cold water (YSCW), and Kuroshio source water (KW). The forces of CDW and TCWW that forms on the surface and sub-surface layers had weakened for 20 years and the force of KW that forms on the intermediate layer showed a distinctively decreasing trend. However, YSCW showed a trend of expanding its force. Phosphate and silicate exhibited a decreasing tendency and phosphate showed a pattern of being depleted on the surface layer after 2009. It is determined that one of the reasons for this is the concentration of nutrients introduced through CDW and TCWW being too low. The concentration of chlorophyll-a exhibited an increasing tendency during the study period, the reasons for which are determined to be the influences of increase in water temperature, supply of nutrients via YSCW, and increases in light transmission from decrease in suspended solid due to the construction of the Three Gorges Dam.

우리나라 주변해역의 해양환경에 밀접한 영향이 있는 동중국해 북부해역의 해양환경 특성을 이해하기 위하여 해양환경 인자의 장기변동 양상을 파악하여 동중국해 북부해역의 해양특성을 구명하기 위하여 연구를 수행하였다. 조사 방법은 1995년부터 2014년까지 20년간 계절에 따라 국립수산과학원 한국해양자료센터(KODC : Korea Oceanographic Data Center)의 동중국해 북부해역의 해양조사 자료(수온, 염분, 용존산소, 영양염, 엽록소-a)를 이용하였다. 연구기간 동안 동중국해 북부해역에 영향을 미치는 주요 수괴는 장강희석수, 대만난류수, 황해저층냉수, 쿠로시오 기원수로 구분되었다. 표층과 아표층에 형성되는 장강희석수와 대만난류수는 20년간 세력이 약화되었으며, 중층에 형성되는 쿠로시오 기원수의 세기는 현저히 감소하는 추세를 나타내었다. 그러나 황해저층냉수는 세력이 확장되는 추세를 나타내었다. 인산염과 규산염은 감소하는 추세였으며 인산염은 2009년 이후 표층에서 고갈되는 양상을 나타내었다. 이러한 원인으로는 장강희석수와 대만난류수를 통해 유입되는 영양염의 농도가 낮기 때문인 것으로 판단된다. 엽록소-a의 농도는 연구기간 동안 증가하는 경향을 나타냈으며 이러한 원인은 수온증가와 황해저층냉수로부터 영양염 공급, 샨샤댐 건설에 의한 부유물질 감소에 따른 광투과 증가의 영향으로 판단된다.

Keywords

References

  1. Asanuma, I., Park, J.G., Yasuda, Y. and Hara, K., 2005, "Monitoring of the East China Sea related to the Three Gorges Dam operation", Proceedings of the First Intermational Workshop on HAB in the northwest Pacific region, 51-61.
  2. Benitez-Nelson, C.R., 2000, "The biogeochemical cycling of phosphorus in marine systems", Earth-Sci. Reviews, Vol.51, 109-135. https://doi.org/10.1016/S0012-8252(00)00018-0
  3. Chai, C., Yu, Z., Shen, Z., Song, X., Cao, X. and Yao, Y., 2009, "Nutrient characteristics in the Yangtze river and the adjacent East China Sea before and after impoundment of the Three Gorges Dam", Sci. Total Environ., Vol.407, 4687-4695. https://doi.org/10.1016/j.scitotenv.2009.05.011
  4. Chen, C.T.A., 2000, "The Three Gorges Dam: Reducing the upwelling and thus productivity in the East China Sea", Geophysical Res. Lett., Vol.27, No.3, 381-383. https://doi.org/10.1029/1999GL002373
  5. Chen, C.T.A., 2008, "Distribution of nutrients in the East China Sea and the South China Sea connection", J. Oceanotr., Vol.64, 737-751. https://doi.org/10.1007/s10872-008-0062-9
  6. Chen, C.T., 2009, "Chemical and physical fronts in the Bohai, Yellow and East China Seas", J. Mar. Syst., Vol.78, 394-410. https://doi.org/10.1016/j.jmarsys.2008.11.016
  7. Chen, Y.L., Chen, H.Y., Gong, G.C., Lin, Y.H., Jan, S. and Takahashi, M., 2004, "Phytoplankton production during a summer coastal upwelling in the East China Sea", Cont. Shelf Res., Vol.24, 1321-1338. https://doi.org/10.1016/j.csr.2004.04.002
  8. Choi, K.H., Lee, C.R., Kang, H.K. and Kang, K.A,, 2011, "Characteristics and variation of size-fractionated zooplankton biomass in the Northern East China Sea", Ocean and Polar Res., Vol.33, No.2, 135-147. https://doi.org/10.4217/OPR.2011.33.2.135
  9. Chung, C.S., Hong, G.H., Kim, S.H., Kim, Y.I., Moon, D.S, Park, J.K., Park, Y.C., Lee, J.H. and Lie, H.J., 2000, "The origin of dissolved inorganic nutrients by Kuroshio Intermediate Water in the eastern continental shelf of the East China Sea", J. Kor. Soc., Vol.3, No.3, 13-23.
  10. Gong, G.C., Chang, J., Chiang, K.P., Hsiung, T.M., Hung, C.C., Duan, S.W. and Codispti, L.A., 2006, "Reduction of primary production and changing of nutrient ratio in the East China Sea: Effect of the Three Gorges Dam?", Geophysical Res. Lett., Vol.33, L07610,doi:10.1029/2006GL025800, 2006.
  11. Gong, G.C., Wen, Y.H., Wang, B.W. and Liu, G.J., 2003, "Seasonal variation of chlorophyll a concentration, primary production and environmental conditions in the subtropical East China Sea", Deep Sea Res. II, Vol.50, 1219-1236. https://doi.org/10.1016/S0967-0645(03)00019-5
  12. Harrison, P.J., Hu, M.H., Yang, Y.P. and Lu, X., 1990, "Phosphate limitation in estuarine and coastal waters of China", J. Exp. Mar. Biol. Ecol., Vol.140. 79-87. https://doi.org/10.1016/0022-0981(90)90083-O
  13. Hsueh, Y., 2000, "The kuroshio in the East China Sea", J. Mar. Sys., Vol.24, 131-139. https://doi.org/10.1016/S0924-7963(99)00083-4
  14. Hu, D.X., 1994, "Some striking features of circulation in Huanghai Sea and East China Sea", Oceanolog. China Seas, Vol.1, 27-38.
  15. Humborg, C., Ittekkot, V., Cociasu, A. and Bodungen, B.V., 1997, "Effect of Danube River dam on Black Sea biogeochemistry and ecosystem structure", Nature, Vol.386, 385-388. https://doi.org/10.1038/386385a0
  16. Hung, J.J., Chan, C.L. and Gong, G.C., 2007, "Summer distribution and Geochemical composition of suspended-particulate matter in the East China Sea", J. Oceanogr. Vol.63, 189-207. https://doi.org/10.1007/s10872-007-0021-x
  17. Hur, H.B., Jacobs, G.A. and Teague, W.J., 1999, "Monthly variations of water masses in the Yellow and East China Seas, November 6, 1998", J. Oceanogr., Vol.55, 171-184. https://doi.org/10.1023/A:1007885828278
  18. Hwang, J.H., Van, S.P., Choi, B.J., Chang, Y.S. and Kim, Y.H., 2014, "The physical processes in the Yellow Sea", Ocean. Coast. Manag., 1-9.
  19. Ito, T., Kaneko, A., Tsubota, H. and Gohda, N., 1994, "The Characteristic distribution of silica over the East China Sea shelf slope", J. Oceanogr., Vol.50, 465-477. https://doi.org/10.1007/BF02234968
  20. Jang, S.T., Lee, J.H., Kim, C.H., Jang, C.J. and Jang, Y.S., 2011, "Movement of cold water mass in the Northern East China Sea in summer", The Sea, Vol.16, No.1, 1-13. https://doi.org/10.7850/jkso.2011.16.1.001
  21. Jiao, N., Zhang, Y., Zeng, Y., Gardner, W.D., Mishonov, A.V., Richardson, M.J., Hong, N., Pan, D., Yan, X.H., Jo, Y.H., Chen, C.T.A., Wang, P., Chen, Y., Hong, H., Bai. Y., Chen, X., Huang, B., Deng, H., Shi, Y. and Yang, D., 2007, "Ecological anomalies in the East China Sea: impacts of the Three Gorges Dam?", Water Res., Vol.41, 1287-1293. https://doi.org/10.1016/j.watres.2006.11.053
  22. Justic, D., Rabalais, N.N., Turner, R.E. and Dortch, Q., 1995, "Changes in nutrient structure of river-dominated coastal waters: Stoichiometric nutrient balance and its consequences", Estuarine, Coastal and Shelf Sci., Vol.40. 339-356. https://doi.org/10.1016/S0272-7714(05)80014-9
  23. Kim, D.S., Choi, S.H., Kim, K.H., Shim, J.H., Yoo, S.J. and Kim, C.H., 2009, "Spatial and temporal variation in nutrient and chlorophyll a concentrations in the northern East China Sea surrounding Cheju Island", Cont. Shelf Res., Vol.29, 1426-1436. https://doi.org/10.1016/j.csr.2009.03.012
  24. Kim, D.S., Shim, J.H. Lee, J.A. and Kang, Y.C., 2005, "The distribution of nutrients and chlorophyll in the Northern East China Sea during the spring and summer", Ocean and Polar Res., Vol.27, No.3, 251-263. https://doi.org/10.4217/OPR.2005.27.3.251
  25. Kim, D.S., Kim, K.H., Shim, J.H. and Yoo, S.J., 2007, "The effect of anticyclonic eddy on nutrients and chlorophyll during spring and summer in the Ulleung Basin, East Sea", The Sea, Vol.12, No.4, 280-286.
  26. Kim, K.H. and Kim, S.S., 2009, "Radium isotope ratio as a tracer for estimating the influence of Changjiang outflow to the Northern part of the East China Sea", J. Kor. Sci. Mar. Environ. Engineer., Vol.12, No.3, 133-142.
  27. Kim, K., Kim, K.R. Rhee, T.S. and Rho, H.K., 1991, "Identification of watermasses in the YS and the East China Sea by cluser ananlysis", In Oceanography of Asian Marginal Seas, ed. by K. Takano, Elsevior, amsterdam.
  28. Kim, S.K., Choi, Y.C. and Kim, J.S., 2008(a), "Distribution of dissolved and particulate organic carbon in the East China Sea in summer", J. Environ. engineer., Vol.11, No.3, 124-131.
  29. Kim, S.W., Lim, J.W. and Jang, L.H., 2008(b), "Temporal and spatial variability of chlorophyll a in the Northern East China Sea using ocean color images in summer", J. Environ. Sci., Vol.17, No.1, 85-95.
  30. Lee, J.H. and Kim, C.H., 2013, "Long-term variability of sea surface temperature in the East China Sea: A review", Ocean and Polar Res., Vol.35, No.2, 171-179. https://doi.org/10.4217/OPR.2013.35.2.171
  31. Li, G., Han, X., Yue, S., Wen, G., Rongmin, Y. and Kusky, T.M., 2006, "Monthly variations of water masses in the East China Seas", Cont. Shelf Rce., Vol.26, 1954-1970. https://doi.org/10.1016/j.csr.2006.06.008
  32. Lin, C., Ning, X., Su, J., Lin, Y. and X, B., 2005, "Environmental changes and the responses of the ecosystems of the Yellow Sea during 1976-2000", J. Mar. Sys., Vol.55, 223-234. https://doi.org/10.1016/j.jmarsys.2004.08.001
  33. Li, M., Xu, K., Watanabe, M. and Chen, Z., 2007, "Long-term variations in dissolved silicate, nitrogen, and phosphorus flux from the Yangtze River into the East China Sea and impacts on estuarine ecosystem", Estuarine, Coastal and Shelf Sci., Vol.71, 3-12. https://doi.org/10.1016/j.ecss.2006.08.013
  34. Lim, S.M., Yeh, S.W. and Kim, G.R., 2012, "Analysis on the relationship between the Korean Temperature and the Atmospheric circulation over the northern hemisphere during Winter", Atmosphere. Kor. Meteorological Soc., Vol.22, No.2, 187-197.
  35. Liu, S.M., Zhang, J., Chen, S.Z., Chen, H.T., Hong, G.H., Wei, H. and Wu, Q.M., 2003, "Inventory of nutrient compounds in the Yellow Sea", Cont. Shelf Res., Vol.23, 1161-1174. https://doi.org/10.1016/S0278-4343(03)00089-X
  36. Ministry of Maritime Affairs and Fisheries, 2006, "Prediction of the marine ecosystem variation in the East China Sea due to the long term climate change", pp. 47-61.
  37. Ministry of Land, Transport and Maritime Affairs, 2009, "The study of oceanographic environmental impact in the South Sea(East China Sea) due to the Three Gorges Dam", pp. 7-175.
  38. Min, S.H., Kim, D.H. and Yoon, H.J., 2010, "Temporal and spatial analysis of SST in the Northeast Asian Seas using NOAA/AVHRR data", J. Kor. Institude Imformation and Communication Engineer., Vol.14, No.12, 2818-2826. https://doi.org/10.6109/jkiice.2010.14.12.2818
  39. Ning, X., Lin, C., Su, J., Liu, C., Hao, Q. and Le, F., 2011, "Long-term changes of dissolved oxygen, hypoxia, and the responses of the ecosystems in the East China Sea from 1975 to 1995", J. Oceanogr., Vol.67, 59-75. https://doi.org/10.1007/s10872-011-0006-7
  40. Oh, H.J., Kang, Y.S. and Park, J.H., 1999, "Distributional characteristics of chlorophyll a and oceanographic conditions in the Northern Part of East China Sea", J. Kor. Fish. Vol.32, No.1, 88-97.
  41. Ptacnik, R., Andersen, T. and Tamminen, T., 2010, "Performance of the redfield ratio and a family of nutrient limitation indicators as thresholds for phytoplankton N vs. P limitation", Ecosystems, Vol.13, 1201-1214. https://doi.org/10.1007/s10021-010-9380-z
  42. Rebstock, G.A. and Kang, Y.S., 2003, "A comparison of three marine ecosystems surrounding the Korean Peninsula: Responses to climate chang", Progress in Oceanogr., Vol.59, 357-379. https://doi.org/10.1016/j.pocean.2003.10.002
  43. Seung, Y.H., 1992, "Water masses and circulations around Korean Peninsula", J. Oceanolog. Soc. Kor., Vol.27. No.4, 324-331.
  44. Son, Y.B., Ryu, J.H., Noh, J.H., Ju, S.J. and Kim, S.H., 2012, "Climatological variability of satellite-derived sea surface temperature and chlorophyll in the south sea of Korea and East China Sea", Ocean and Polar Res., Vol. 34, No. 2, 201-218. https://doi.org/10.4217/OPR.2012.34.2.201
  45. Son, Y.B., Lee, T.H., Choi, D.L., Jang, S.T., Kim, C.H., Ahn, Y.H., Ryu, J.H., Kim, M.K., Jung, S.K. and Ishizaka, J., 2010, "Spatial and temporal variations of satellite-derived 10-year surface particulate organic carbon(POC) in the East China Sea", Kor. J. Remote Sensing, Vol.26, No.4, 421-437.
  46. Tian, R.C., Hu, F.X. and Martin, J.M., 1993, "Summer nutrient fronts in the Changjiang(Yantze River) estuary", Estuarine, Coastal and Shelf Sci., Vol. 37. 27-41. https://doi.org/10.1006/ecss.1993.1039
  47. Wang, B.D., Wang, X.L., and Zhan, R., 2003, "Nutrient conditions in the Yellow Sea and the East China Sea", Estuarine, Coastal and shelf Sci., Vol. 58, 127-136.
  48. Wong, G.T.F., Gong, G.C., Liu, K.K. and Pai, S.C., 1998, "'Excess nitrate' in the East China Sea", Estuarine, Coastal and Shelf Sci., Vol.46, 411-418. https://doi.org/10.1006/ecss.1997.0287
  49. Yanagi, T., 2002, "Water, salt, phosphorus and nitrogen budgets of the Japan Sea", J. Oceanogr., Vol.58, 797-804. https://doi.org/10.1023/A:1022815027968
  50. Zhu, Z.Y., Zhang, J., Wu, Y., Zhang, Y.Y., Lin, J. and Liu, S.M., 2011, "Hypoxia off the Changjiang(Yangtze river) estuary: oxygen depletion and organic matter decomposition", Mar. Chem., Vol.125, 108-116. https://doi.org/10.1016/j.marchem.2011.03.005

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