서해안 염하구 습지 퇴적물의 지화학적 분석 (C/N 및 ${\delta}^{13}C$)에 기반한 동아시아 몬순 변동 연구

East Asian Monsoon History as Indicated by C/N Ratios and ${\delta}^{13}C$ Evidence from the Estuarine Tidal Flat Sediments in the West Coast of Korea

  • 투고 : 2010.08.17
  • 심사 : 2010.09.25
  • 발행 : 2010.10.31

초록

후기 플라이스토신 및 홀로신 시기 동아시아 여름 몬순의 변화를 밝히기 위해 지화학적 분석 방법(탄소동원원소(${\delta}^{13}C$), 탄질율(C/N), 대자율, 입도 분석 등)을 활용하여 서해안 염하구 습지 퇴적물을 분석하였다. 연구 결과에 따르면 한반도에서 여름 몬순은 7,700-7,800년 전에 정점이었고 7,400년 전 경부터 약화되기 시작한다. 그리고 마지막 빙하 최성기 중 24,000-24,500년 전 경에는 몬순이 상대적으로 약했고 18,500-19,500년 전 경에는 상대적으로 강했다. 염하구 습지 퇴적물의 지화학적 분석 자료는 과거 여름 몬순의 변동을 밝힐 수 있는 새로운 고환경 자료로서 가치를 갖는다. 특히 고환경 자료가 부족한 한국 학계에 큰 도움이 될 것으로 사료된다.

Geochemical and physical investigations such as ${\delta}^{13}C$ isotope ratio, carbon/nitrogen (C/N) ratio, magnetic susceptibility (MS), and particle size analyses were carried out on the estuarine tidal flat sediments from the west coast of Korea in order to reconstruct the East Asian summer monsoon variability during the late Pleistocene and Holocene Our results indicated that the summer monsoon probably peaked around 7,700-7,800 yr BP and then started to decline about 7,400 yr BP in the Korean peninsular, and that the monsoon was relatively weak between 24,000-24,500 yr BP but relatively strong between 18,500-19,500 yr BP during the Last Glacial Maximum. Our estuarine geochemical data have proven to be valuable as a new proxy for detecting the shifts in monsoon strength. This new evidence will be helpful, especially for Korean paleoenvironmental studies with few proxy data archives.

키워드

참고문헌

  1. An, Z., Liu, T., Lu, Y., Porter, S. C., Kukla, G., Wu, X., and Hua, Y., 1990, The long-term paleomonsoon variation recorded by the loesspaleosol sequence in central China, Quaternary International, 7.8, 91-95. https://doi.org/10.1016/1040-6182(90)90042-3
  2. An, Z., Porter, S. C., Kutzbach, J. E., Wu, X., Wang, S., Liu, X., Li, X., and Zhou, W., 2000, Asynchronous Holocene optimum of the East Asian monsoon, Quaternary Science Reviews, 19, 743-762. https://doi.org/10.1016/S0277-3791(99)00031-1
  3. An, Z., Porter, S. C., Zhou, W., Lu, Y., Donahue, D. J., Head, M. J., Wu, X., Ren, J. Z., and Zheng, H., 1993, Episode of strengthened summer monsoon climate of Younger Dryas age on the Loess Plateau of Central China, Quaternary Research, 39, 45-54. https://doi.org/10.1006/qres.1993.1005
  4. Bond, G., Broecker, W., Johnsen, S., McManus, J., Labeyrie, L., Jouzel, J., and Bonani, G., 1993, Correlations between climate records from North Atlantic sediments and Greenland ice, Nature, 365, 143-147. https://doi.org/10.1038/365143a0
  5. Chen, F. H., Bloemendal, J., Zhang, P. Z., and Liu, G. X., 1999, An 800 ky proxy record of climate from lake sediments of the Zoige Basin, eastern Tibetan Plateau, Palaeogeography Palaeoclimatology Palaeoecology, 151, 307-320. https://doi.org/10.1016/S0031-0182(99)00032-2
  6. Choi, K., 2005, Pedogenesis of late Quaternary deposits, northern Kyonggi Bay, Korea: Implications for relative sea-level change and regional stratigraphic correlation, Palaeogeography Palaeoclimatology Palaeoecology, 220, 387-404. https://doi.org/10.1016/j.palaeo.2005.02.006
  7. Clark, P. U. , Dyke, A. S., Shakun, J. D., Carlson, A. E., Clark, J., Wohlfarth, B., Mitrovica, J. X., Hostetler, S. W., and McCabe, A. M., 2009, The last glacial maximum, Science, 325, 710-714. https://doi.org/10.1126/science.1172873
  8. Deines, P., 1980, The isotopic composition of reduced organic carbon, in Fritz, P. and Fontes, J. C. (eds.), Handbook of Environmental Isotope Geochemistry, The Terrestrial Environment vol. 1, A. Elsevier, Amsterdam, 329-406.
  9. Heier-Nielsen, S., Heinemeier, J., Nielsen, H. L., and Rud, N., 1995, Recent reservoir ages for Danish fjords and marine waters, Radiocarbon, 37, 875-882. https://doi.org/10.1017/S0033822200014958
  10. Hu, C. Y., Henderson, G. M., Huang, J. H., Xie, S., Sun, Y., and Johnson, K. R., 2008, Quantification of Holocene Asian monsoon rainfall from spatially separated cave records, Earth and Planetary Science Letters, 266, 221-232. https://doi.org/10.1016/j.epsl.2007.10.015
  11. Kemp, A. C., Vane, C. H., Horton, B. P., and Culver, S. J., 2010, Stable carbon isotopes as potential sealevel indicators in salt marshes, North Carolina, USA, Holocene, 20, 623-636. https://doi.org/10.1177/0959683609354302
  12. Kim, D. S., Park, B. K., and Shin, I. C., 1999, Paleoenvironmental changes of the Yellow Sea during the late Quaternary, Geo-Marine Letters, 18, 189-194.
  13. Kim, J. M. and Kennett, J. P., 1998, Paleoenvironmental changes associated with the Holocene marine transgression, Yellow Sea (Hwanghae), Marine Micropaleontology, 34, 71-89. https://doi.org/10.1016/S0377-8398(98)00004-8
  14. Kim, J. M. and Kucera, M., 2000, Benthic foraminifera record of environmental changes in the Yellow Sea (Hwanghae) during the last 15,000 years. Quaternary Science Reviews, 19, 1067-1085. https://doi.org/10.1016/S0277-3791(99)00086-4
  15. Kong, K. S. and Lee, C. W., 2005, Marine reservoir corrections (ΔR) for southern coastal waters of Korea, Journal of the Korean Society of Oceanography, 10, 124-128 (in Korean with English abstract).
  16. Lamb, A. L., Vane, C. H., Wilson, G. P., Rees, J. G., Moss-Hayes, and V. L., 2007, Assessing delta C- 13 and C/N ratios from organic material in archived cores as Holocene sea level and palaeoenvironmental indicators in the Humber Estuary, UK, Marine Geology, 244, 109-128. https://doi.org/10.1016/j.margeo.2007.06.012
  17. Lamb, A. L., Wilson, G. P., and Leng, M. J., 2006, A review of coastal palaeoclimate and relative sealevel reconstructions using delta C-13 and C/N ratios in organic material, Earth-Science Reviews, 75, 29-57.
  18. Lee, S. H., Il Lee, Y., Il Yoon, H., and Yoo, K. C., 2008, East Asian monsoon variation and climate changes in Jeju Island, Korea, during the latest Pleistocene to early Holocene, Quaternary Research, 70, 265-274. https://doi.org/10.1016/j.yqres.2008.04.014
  19. Lim, J., Matsumoto, E., and Kitagawa, H., 2005, Eolian quartz flux variations in Cheju Island, Korea, during the last 6500 yr and a possible Sunmonsoon linkage, Quaternary Research, 64, 12- 20. https://doi.org/10.1016/j.yqres.2005.02.012
  20. Meyers, P. A., 1994, Preservation of elemental and isotopic source identification of sedimentary organic matter, Chemical Geology, 114, 289-302. https://doi.org/10.1016/0009-2541(94)90059-0
  21. Peng, Y. J., Xiao, J., Nakamura, T., Liu, B. L., and Inouchi, Y., 2005, Holocene East Asian monsoonal precipitation pattern revealed by grain-size distribution of core sediments of Daihai Lake in Inner Mongolia of north-central China, Earth and Planetary Science Letters, 233, 467-479. https://doi.org/10.1016/j.epsl.2005.02.022
  22. Peterson, B. J., Fry, B. Hullar, M. Saupe, S., and Wright, R., 1994, The distribution and stable carbon isotope composition of dissolved organic carbon in estuaries, Estuaries, 17, 111-121 https://doi.org/10.2307/1352560
  23. Prahl, F. G., Bennett, J. T., and Carpenter, R., 1980, The early diagenesis of aliphatic hydrocarbons and organic matter in sedimentary particulates from Dabob Bay, Washington, Geochimica et Cosmochimica Acta, 44, 1967-1976. https://doi.org/10.1016/0016-7037(80)90196-9
  24. Schettler, G., Liu, Q., Mingram, J., Stebich, M., and Dulski, P., 2006, East-Asian monsoon variability between 15 000 and 2000 cal yr BP recorded in varved sediments of Lake Sihailongwan (northeastern China, Long Gang volcanic field), Holocene, 16, 1043-1057. https://doi.org/10.1177/0959683606069388
  25. Southon, J., Kashgarian, M., Fontugne, M., Metivier, B., and Yim, W. W., 2002, Marine reservoir corrections for the Indian Ocean and southeast Asia, Radiocarbon, 44, 167-180. https://doi.org/10.1017/S0033822200064778
  26. Stuiver, M., Reimer, P. J., Bard, E., Beck, J. W., Burr, G. S., Hughen, K. A., Kromer, B., McCormac, G., Van der Plicht, and J., Spurk, M., 1998, INTCAL98 radiocarbon age calibration, 24,000-0 cal BP, Radiocarbon, 40, 1041-1083. https://doi.org/10.1017/S0033822200019123
  27. Stuiver, M., and Reimer, P. J., 1993, Extended 14C database and revised CALIB radiocarbon calibration program, Radiocarbon, 35, 215-230. https://doi.org/10.1017/S0033822200013904
  28. Wang, Y. J., Cheng, H., Edwards, R. L., An, Z. S., Wu, J. Y., Shen, C.-C., and Dorale, J. A., 2001, A highresolution absolute-dated Late Pleistocene monsoon record from Hulu Cave, China, Science, 294, 2345-2348. https://doi.org/10.1126/science.1064618
  29. Wang, Y. J., Cheng, H., Edwards, R. L., He, Y. Q., Kong, X. G., An, Z. S., Wu, J. Y., Kelly, M. J., Dykoski, C. A., and Li, X. D., 2005, The Holocene Asian monsoon: Links to solar changes and North Atlantic climate, Science, 308, 854-857. https://doi.org/10.1126/science.1106296
  30. Wilson, G. P., Lamb, A. L., Leng, M. J., Gonzalez, S., and Huddart, D., 2005, Variability of organic delta C- 13 and C/N in the Mersey Estuary, UK and its implications for sea-level reconstruction studies, Estuarine Coastal and Shelf Science, 64, 685-698. https://doi.org/10.1016/j.ecss.2005.04.003
  31. Xiao, J., Porter, S. C., An, Z.S., Kumai, H., and Yoshikawa, S., 1995, Grain-size of quartz as an indicator of winter monsoon strength on the Loess plateau of Central China during the last 130,000-Yr, Quaternary Research, 43, 22-29. https://doi.org/10.1006/qres.1995.1003
  32. Xiao, J. L., and An, Z. S., 1999, Three large shifts in East Asian monsoon circulation indicated by loesspaleosol sequences in China and late Cenozoic deposits in Japan, Palaeogeography Palaeoclimatology Palaeoecology, 154, 179-189. https://doi.org/10.1016/S0031-0182(99)00110-8
  33. Zong, Y., Lloyd, J. M., Leng, M. J., Yim, W. W. S., and Huang, G., 2006, Reconstruction of Holocene monsoon history from the Pearl River Estuary, southern China, using diatoms and carbon isotope ratios, Holocene, 16, 251-263. https://doi.org/10.1191/0959683606hl911rp