本研究所分析的樣品係取自於西北太平洋日本東北外海岩心MD012419 (38°53.02'N，143°19.46'E，水深2291，現為親潮及黑潮混合區域，岩心全長為45公尺，研究以五公分為間距，分析樣品的不飽和烯酮類指標(UK'37 )、陸源有機物質(n-alkane)及不飽和烯酮類的濃度，並配合浮游有孔蟲的穩定氧同位素地層及化石組成資料，以探討西北太平洋近十二萬年來親潮與黑潮在全球氣候變遷下的南北移動歷史與機制。

海水古溫度曲線介於11.5℃~20.1℃之間變動，岩心頂端(26cm)溫度為15.5℃，與現今的海水年均溫度15.7℃十分接近。根據有孔蟲化石組成，本岩心可以分為三個區段，氧同位素第5e-5c階時為黑潮水團；末次冰期到第1階後半部則為親潮水團；其餘部分則為親潮及黑潮混合水團影響區域。

氧同位素第5e(19.8℃)~5c(18.5℃)階，UK'37溫度階較第1階(17.8℃)高，並與現今黑潮鋒面年均溫度一致，顯示在9.6~12萬年間，黑潮向北移動至研究區域(38°N)。第5c階至第3氧早期，海水表層溫度從18.5℃下逐漸下降至第4階(16℃)。氧同位素第3階早期溫度從12.8℃上升至氧同位素第三階中段17.2℃，而同時間內浮游有孔蟲氧同位素值卻變重，指示此時混和水團內的高溫高鹽的黑潮水比例增多。氧同位素第2階到末次冰盛期時溫度快速下降至11.8℃，之後進入第1階 (Holocene)便逐漸上昇至17.8℃左右; 新仙女木事件UK'37 (11.5℃)比末次冰盛期(12.7℃)溫度還低，與日本海東側古海水溫度變化趨勢相同；浮游有孔蟲化石分析亦顯示次極區冷水生物存在於氧同位素第2階內，指示此時親潮由北向南侵入本研究區域。岩心在氧同位素第1階前半部時呈現UK'37-SST曲線往下降而氧同位素卻變輕，推論可能親潮水在混和水團內的混合比例較多。

研究顯示UK'37海水古溫度曲線與日本琵琶湖的風成石英顆粒通量曲線的驅勢十分相似。顯示在氧同位素第二、三、四階時，由於次極區溫度降低導致西風強盛，所以風成石英顆粒通量則偏高；反之在氧同位素第一、五階時，次極區溫度上升導致西風則較弱，所以風成石英顆粒通量則偏低。

由不飽和烯酮類指標所推算出的海水表層溫度、陸源有機物質含量及不飽和烯酮類含量推斷三者關係，本岩心在高海水溫時，陸源有機物質含量及不飽和烯酮類含量皆較高；在低海水溫時，陸源有機物質含量及不飽和烯酮類含量皆較低。推斷可能氧同位素第1及第5階時，西南季風加強，故雨量增加，侵蝕加大，使岩心中陸源有機物質質增加，間接使海洋中的初級生產力加強；反之在氧同位素第2-4階低海水溫，因氣候較為乾燥，雨量減少，侵蝕小，使陸源輸入及海洋初級生產力減少。

An, Z.-S., 2000, The history and variability of the East Asia paleomonsoon climate: Quaternary Science Review, v.19, p.171-187.

Brassell, S. C., Eglinton, G., Marlowe, I. T., Pflaumann, U., and Sarnthein, M., 1986, Molecular stratigraphy: A new tool for climatic assessment: Nature, v.320, p.129-133.

Conte, M. H. and Eglinton, G., 1993, Alkenone and alkenoate distributions within the euphotic zone of the eastern north Atlantic: correlations with production temperature: Deep-Sea Research, v.40(10), p.1935-1961.

Hastings, D. W., Russell, A. D., and Emerson, S. R., 1998, Foraminiferal magnesium in G. sacculifer as a paleotemperature proxy in the equatorial Atlantic and Carribean surface oceans, Paleoceanography, v.13(2), p.161-169.

Huang, C.-C., 2003, Paleoceanography of the western north Pacific since the last interglacial : records of IMAGES MD012419 core, 碩士論文.

Huang, C.-Y., 2002, High-resolution paleomonsoon/paleoceanography fluctuation records from the Okinawa trough cores for the past 40kyrs IMAGES MD972151 core, 碩士論文.

Jasper, J. P., and Gagosian, R. B., 1993, The relationship between sedimentary organic carbon isotopic composition and organic biomarker compound comcentration: Geochimica et Cosmochimica Acta, v.57, p.167-186.

Kawai, H., 1972, Hydrography of the Kuroshio Extension. In: Stommel, H., Yoshida, K. (Eds.). Kuroshio, its physical aspects. Tokyo University Press, Tokyo, p. 235-352

Kennedy, J. A. and Brassell, S. C., 1992, Molecular records of twentieth-century El Nino events in laminated sediments from the Santa Barbara basin. Nature, v.357,p.62-64

Kim, J.-M., P.Kennett, J., Park, B.-K., Kim, D.-C., Kim, G.-Y., Roark, E. B., 2000, Paleoceanographic change during the last deglaciation, East Sea of Korea. Paleoceanography, v.15, p.254-266

Marlowe, I. T., Brassell, S. C., Eglinton, G. and Green, J. C., 1984, Long chain unsaturated ketones and esters in living algae and marine sediments: Organic Geochemistry, v.6, p.135-141.

Martinson, D. G., Pisias, N. G., Hays, J. D., Imbrie, J., Moore, Jr., and Shackleton, N. J., 1987, Age dating and the orbital theory of the ice ages: development of a high-resolution 0 to 300,000-year chronostratigraphy: Quaternary Reasearch, v.27, p.1-29.

Moore, T. C., Jr., Burckle, L. H., Geitzenauer, K., Luz, B., Molina-cruz, A., Robertson, J. H., Sachs, H., Sancetta, C., Thiede, J., Thompson, P., and Wenkam, C., 1980, The reconstruction of sea surface temperatures in the Pacific Ocean of 18,000 B.P: Marine Micropaleontology, v.5, p.215-247.

Müller, P. J., G. Kirdt, G. Ruhland, I. von Storch, and A. Rossell-Mele , 1998, Calibration of the alkenone paleotemperature index based on core-tops from the eastern South Atlantic and the global ocean (60°N-60°S), Geochimica et Cosmochimica Acta, v.62, p.1757-1772.

Nurnberg, D., Bijma, J., and Hemleben, C., 1996, Assessing the reliability of magnesium in foraminiferal calcite as a proxy for water mass temperatures: Geochimica et Cosmochimica Acta, v.60, p.803-814.

Nurnberg, D. and Muller, A., 2000, Paleo-sea surface temperature calculations in the equatorial east Atlantic from Mg/Ca ratios in planktic foraminifera: A comparison to sea surface temperature estimates form Uk'37, oxygen isotopes, and foraminiferal transfer funtion: Paleoceanography, v.15(1), p.124-134.

Prahl, F. G. and Wakeham, S. G., 1987, Calibration of unsaturation patterns in long-chain ketone compositions for paleotemperature assessment: Nature, v.330, p.367-369.

Prahl, F. G., Muehlhausen, L. A. and Zahnle, D. L., 1988, Further evaluation of long-chain alkenones as indicators of paleoceanographic conditions: Geochimica et Cosmochimica Acta, v.52, p.2303-2310.

Sawada, K., Handa, N. and Nakatsuka, T., 1998, Production and transport of long-chain alkenones and alkyl alkenoates in a sea water column in the northwestern Pacific off central Japan: Marine Chemistry, v.59, p.219-234.

Sikes, E. L., Farrington, J. W. and Keigwin, L. D., 1991, Use of the alkenone unsaturation ratio Uk37 to determine past sea surface temperature: core-top SST calibrations and methodology considerations: Earth and Plantary Scinece Letters, v.104, p.36-47.

Sikes, E. L. and Volkman, J. K., 1993, Calibration of alkenone unsaturation ratios (Uk'37) for paleotemperature estimation in cold polar waters: Geochimica et Cosmochimica Acta, v.57, p.1883-1889.

Takemoto, A. and Oda, M., 1997, New Planktic foraminiferal transfer funtions for the Kuroshio-Oyashio Current region off Japan: Paleontological Research, v.1(4), p.291-310.
Villanueva, J., Grimalt, J.O. and Labeyrie, L. D., Laurence Vidal, and Jean Louis-Turon., 1998 Precessional forcing of productivity in the North Atlantic Ocean. Paleoceanography, v.13, p.561-571

Villanueva, J., Calvo, E., Pelejero, C., Grimalt, J. O. and Labeyrie, L., 2001, A latitudinal productivity band in the central North Atlantic over the last 270 kyr: An alkenone perspepective. Paleoceanography, v.16, p.617-626

Volkman, J. K., Eglinton, G., Corner, E. D. S. and Sargent, J. R., 1980, Novel unsaturated straight-chain C37-C39 methyl and ethyl ketones in marine sediments and a cocoolithophorid Emiliania huxleyi: In: Advances in organic geochemistry 1979, Douglas, A. G. and Maxwell, J. R., editors, Pergamon Press, Oxford, p.219-227.

Volkman, J. K., Barrett, S. M., Blackburn, and S. I., Sikes, E. L., 1995, Alkenones in Gephyrocapsa oceanica: Implications for studies of paleoclimate: Geochimica et Cosmochimica Acta, v.59, p.513-520.

Xiao, J.L., Kumai, H., Yoshikawa, S., Masuda, H., and An, Z. S., 1993, Quartz from selected horizons of loess-paleosol sequence on the the Chinese Loess Plateau and the Osaka Group of central Japan: The Quaternary Research, v.32, p.209-217

Xiao, J.L., Poter, S. C., An, Z. S., Kumai, H., and Yoshikawa, S., 1995, Grain size of quartzas an indicator of winter monsoon strength on the Loess Plateau of central China during the 130,000yr: The Quaternary Research, v.43, p.22-29

Xiao, J.L., Inouchi, Y., Kumai, H., Yoshikawa, S., Kondo, Y., Liu, T., and An, Z. S., 1997, Eolian quartz flux to Lake Biwa, central Japan, over the past 145,000 years: The Quaternary Research, v.48, p.48-57