博碩士論文 etd-0829112-122454 詳細資訊


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姓名 馮俊欽 (Chun-Chin Feng) 電子郵件信箱 E-mail 資料不公開
畢業系所 海洋地質及化學研究所(Marine Geology and chemistry)
畢業學位 碩士(Master) 畢業時期 100學年第2學期
論文名稱(中) 由底棲有孔蟲鎂鈣比值重建最近18萬年
西赤道太平洋區中層水的古水文記錄( MD052922C ) 
論文名稱(英) The Last 180 ka Benthic Foraminiferal Mg/Ca Record and the Implication on Intermediate Water Hydrology Variations of the Western Equatorial Pacific ( MD052922C ) 
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    摘要(中) 南極中層水 (Antarctic Intermediate Water, AAIW)對全球的氣候系統變化具有一定影響力,且在全球碳循環中扮演儲存庫的重要角色。過去多有學者致力探討AAIW在冰期與間冰期間的強度與空間變化,及如何影響全球的氣候。本研究利用取自西太平洋安東爪哇高原的岩心〈岩心MD052922C,岩心東經156°08.81’;南緯4°59.28’,水深1453公尺〉,分析其中底棲性有孔蟲Cibicidoides wuellerstorfi化石殼體上的鎂鈣比值,重建了西太平洋地區近18萬年來中層水的古水文紀錄,同時分析化石殼體上的稀土元素濃度,並計算其與鈣的比值,當作指示中層水深度古水團變化的指標。研究結果顯示西太平洋區域近18萬年的的中層水溫度變化範圍約在2.2~3.2℃,並無明顯的冰期/間冰期變化。在MIS 6時,底棲性有孔蟲C. wuellerstorfi的鎂鈣比值較高,而年代越靠近現代,計算得到的中層水溫度數值持續減少,可能指示南極中層水對熱帶太平洋地區的影響越來越明顯。。在MIS5時,總稀土元素與鈣濃度比值有一明顯增加的趨勢,據推測應是受到年紀較老的太平洋深層水持續湧昇所影響,然而導致湧昇的原因目前仍未完全了解。
    摘要(英) The Antarctic Intermediate Water (AAIW) plays an important role on controlling globally climatic change. Numbers of researchers attempted to discuss whether AAIW across the equator or notduring glacial- interglacial transitions. In this study, we analyzed Mg/Ca and ΣREE/Ca on benthic foraminiferal species, Cibicidoides wuellerstorfi, from core MD052922C, which retrieved from western equatorial Pacific region, for revealing the long-term variations of Paleohydrology in intermediate water depths of tropical Pacific. Our evaluated results reveal that the Mg/Ca ratios ranging from 1.27 to 2.04 mmol/mol, and ranging between 2.2 and 3.2℃ when calculating into paleotemoeratures.Highest Mg/Ca can be observed in MIS 6. This finding implies that the present AAIW mean temperature is colder than glacials, and the present AAIW is well-ventilated than that in glacials.Higher ΣREEs/Ca values are usually well correlated with old and poor ventilated water masses. In our record, higher ΣREEs/Ca values are observed at MIS 5 impling that the intermediate depth water mass of the western tropical Pacific is poor ventilated when comparing to glacials.
    關鍵字(中)
  • 稀土元素
  • 太平洋深層水
  • 底棲性有孔蟲
  • 鎂鈣比值
  • 南極中層水
  • 關鍵字(英)
  • Rare Earth Element
  • Mg/Ca
  • benthic foraminifera
  • Pacific Deep Water
  • Antarctic Intermediate Water
  • 論文目次 目錄
    論文審定書....................................................................................................................... i
    誌謝................................................................................................................................. ii
    中文摘要......................................................................................................................... iii
    英文摘要......................................................................................................................... iv
    目錄................................................................................................................................. v
    圖次............................................................................................................................... vii
    表次................................................................................................................................ ix
    第一章 緒論.................................................................................................................... 1
    1.1 前人研究............................................................................................................ 1
    1.2 研究區域之水文環境........................................................................................ 2
    1.3 研究原理與機制................................................................................................ 6
    1.3.1 鎂鈣比值的意義........................................................................................... 6
    1.3.2 稀土元素與鈣比值的意義.......................................................................... 7
    1.4 研究目的........................................................................................................... 8
    第二章 研究材料與分析方法........................................................................................ 9
    2.1 研究材料........................................................................................................... 9
    2.2 年代模式的建立..............................................................................................11
    2.3 分析方法.......................................................................................................... 12
    2.3.1 底棲性有孔蟲特性..................................................................................... 12
    2.3.2 沉積物前處理............................................................................................. 12
    2.3.3 鎂鈣比分析................................................................................................. 12
    2.3.4 稀土元素分析............................................................................................. 15
    第三章 研究結果.......................................................................................................... 16
    3.1 鎂鈣分析結果.................................................................................................. 16
    3.2 古海水氧同位素.............................................................................................. 25
    3.3 稀土元素分析結果.......................................................................................... 27
    第四章 討論.................................................................................................................. 31
    4.1 影響鎂鈣比值的因素...................................................................................... 31
    4.1.1 清洗殼體影響............................................................................................. 31
    4.1.2 底棲性有孔蟲是否反映真實溫度............................................................. 33
    4.1.3 不同水團影響............................................................................................. 33
    4.2 影響稀土元素與鈣比值的因素...................................................................... 34
    4.2.1 火山灰和海底火山影響............................................................................. 33
    4.2.2 不同水團影響............................................................................................. 33
    第五章 結論.................................................................................................................. 39
    參考文獻........................................................................................................................ 40
    附錄............................................................................................................................... 43
    圖次
    圖 1-1 現今南大洋中層水流徑分布圖。..................................................................... 4
    圖 1-2 太平洋溫度剖面圖。......................................................................................... 5
    圖 1-3(a) 北太平洋鹽度剖面圖。................................................................................ 5
    圖 1-3(b) 北太平洋鹽度剖面圖。................................................................................ 5
    圖 2-1 岩心採樣位置圖。............................................................................................ 10
    圖 2-2 有孔蟲殼體鎂鈣的清洗步驟。....................................................................... 14
    圖 3-1 鎂鈣對年代作圖。........................................................................................... 19
    圖 3-2 底棲性有孔蟲鋁鈣、錳鈣、鐵鈣比值對年代做圖。.................................... 20
    圖 3-3 MD052922C 岩心 C. wuellerstorfi 溫度對年代作圖。.................................. 21
    圖 3-4 全球深度1500 公尺海水年均溫。................................................................. 21
    圖 3-5 溫度、氧和碳同位素對年代作圖。............................................................... 23
    圖 3-6(a) 氧同位素與鎂鈣的關係圖。...................................................................... 24
    圖 3-6(b) 氧同位素與冰期與間冰期間鎂鈣的關係圖。.......................................... 21
    圖 3-7(a) 古海水氧同位素對年代作圖。.................................................................. 26
    圖 3-7(b) 古海水面變化曲線。.................................................................................. 26
    圖 3-8 殼體中總稀土元素總量對年代作圖。........................................................... 28
    圖 3-9 殼體中稀土元素總量與鈣的比值與錳鈣、鐵鈣鋁鈣的關係圖。............... 29
    圖 3-10 殼體中稀土元素總量與鈣比值、氧同位素、碳同位素對年代作圖。..... 30
    圖 4-1 鎂鈣元素比值對鋁鈣、錳鈣、鐵鈣之關係圖。........................................... 32
    圖 4-2 岩性描述。....................................................................................................... 35
    圖 4-3(a) 總稀土元素濃度。...................................................................................... 35
    圖 4-3(b) 磁感率。...................................................................................................... 35
    圖 4-3(a) 總輕稀土元素/總重稀土元素。................................................................. 35
    圖 4-4 溫度、稀土元素與鈣比值、錳鈣對年代作圖。........................................... 38
    表次
    表1-1 太平洋中層水海域水團物理、化學性質與深度分布。................................... 3
    表3-1 底棲性有孔蟲C. wuellerstorfi 使用的溫度公式整理。.................................. 17
    參考文獻 壹、 中文參考文獻
    陳鎮東,1994,海洋化學。部編大學用書,國立編譯館編著,茂昌圖書有限公司
    發行,台北,共551頁。
    劉峰榮 (2009) 西太平洋MD05-2922 岩心18 萬年以來有孔蟲碳氧同位素記錄。
    國立台灣師範大學地球科學研究所碩士論文,共70頁。
    貳、 英文參考文獻
    Anand, P., Elderfield, H., Conte, M.H., 2003. Calibration of Mg/Ca thermometry in
    planktonic foraminifera from a sediment trap time series. Paleoceanography 18,
    1050.
    Anderson, R.F., Ali, S., Bradtmiller, L.I., Nielsen, S.H.H., Fleisher, M.Q., Anderson,
    B.E., Burckle, L.H., 2009. Wind-Driven Upwelling in the Southern Ocean and
    the Deglacial Rise in Atmospheric CO2. Science 323, 1443-1448.
    Barker, S., Greaves, M., Elderfield, H., 2003. A study of cleaning procedures used for
    foraminiferal Mg/Ca paleothermometry. Geochem. Geophys. Geosyst. 4, 8407.
    Bintanja, R., van de Wal, R.S.W., Oerlemans, J., 2005. Modelled atmospheric
    temperatures and global sea levels over the past million years. Nature 437,
    125-128.
    Bolton, C.T., Gibbs, S.J., Wilson, P.A., 2010. Evolution of nutricline dynamics in the
    equatorial Pacific during the late Pliocene. Paleoceanography 25, PA1207.
    Bostock, H.C., Hayward, B.W., Neil, H.L., Currie, K.I., Dunbar, G.B., 2011.
    Deep-water carbonate concentrations in the southwest Pacific. Deep Sea
    Research Part I: Oceanographic Research Papers 58, 72-85.
    Bostock, H.C., Opdyke, B.N., Gagan, M.K., Fifield, L.K., 2004. Carbon isotope
    evidence for changes in Antarctic Intermediate Water circulation and ocean
    ventilation in the southwest Pacific during the last deglaciation.
    Paleoceanography 19, PA4013.
    Bostock, H.C., Opdyke, B.N., Williams, M.J.M., 2010. Characterising the
    intermediate depth waters of the Pacific Ocean using δ13C and other
    geochemical tracers. Deep Sea Research Part I: Oceanographic Research Papers
    57, 847-859.
    Byrne, R.H., Kim, K.-H., 1990. Rare earth element scavenging in seawater.
    Geochimica et Cosmochimica Acta 54, 2645-2656.
    Elderfield, H., Yu, J., Anand, P., Kiefer, T., Nyland, B., 2006. Calibrations for benthic
    foraminiferal Mg/Ca paleothermometry and the carbonate ion hypothesis. Earth
    and Planetary Science Letters 250, 633-649.
    Flower, B.P., Oppo, D.W., McManus, J.F., Venz, K.A., Hodell, D.A., Cullen, J.L.,
    2000. North Atlantic Intermediate to Deep Water Circulation and Chemical
    Stratification During the Past 1 Myr. Paleoceanography 15, 388-403.
    Johnson, K.R., Hu, C., Belshaw, N.S., Henderson, G.M., 2006. Seasonal trace-element
    and stable-isotope variations in a Chinese speleothem: The potential for
    high-resolution paleomonsoon reconstruction. Earth and Planetary Science
    Letters 244, 394-407.
    Lear, C.H., Rosenthal, Y., Slowey, N., 2002. Benthic foraminiferal
    Mg/Ca-paleothermometry: a revised core-top calibration. Geochimica et
    Cosmochimica Acta 66, 3375-3387.
    Martin, P.A., Lea, D.W., Rosenthal, Y., Shackleton, N.J., Sarnthein, M., Papenfuss, T.,
    2002. Quaternary deep sea temperature histories derived from benthic
    foraminiferal Mg/Ca. Earth and Planetary Science Letters 198, 193-209.
    Pahnke, K., Goldstein, S.L., Hemming, S.R., 2008. Abrupt changes in Antarctic
    Intermediate Water circulation over the past 25,000 years. Nature Geosci 1,
    870-874.
    Pahnke, K., Zahn, R., 2005. Southern Hemisphere Water Mass Conversion Linked
    with North Atlantic Climate Variability. Science 307, 1741-1746.
    Piper, D.Z., 1974. Rare earth elements in the sedimentary cycle: A summary.
    Chemical Geology 14, 285-304.
    Reuer, M.K., Boyle, E.A., Cole, J.E., 2003. A mid-twentieth century reduction in
    tropical upwelling inferred from coralline trace element proxies. Earth and
    Planetary Science Letters 210, 437-452.
    Saenko, O.A., Weaver, A.J., Gregory, J.M., 2003. On the Link between the Two
    Modes of the Ocean Thermohaline Circulation and the Formation of
    Global-Scale Water Masses. Journal of Climate 16, 2797-2801.
    Shen, C.-C., Hastings, D.W., Lee, T., Chiu, C.-H., Lee, M.-Y., Wei, K.-Y., Edwards,
    R.L., 2001. High precision glacial–interglacial benthic foraminiferal Sr/Ca
    records from the eastern equatorial Atlantic Ocean and Caribbean Sea. Earth and
    Planetary Science Letters 190, 197-209.
    Sosdian, S., Rosenthal, Y., 2009. Deep-Sea Temperature and Ice Volume Changes
    Across the Pliocene-Pleistocene Climate Transitions. Science 325, 306-310.
    Toggweiler, J.R., Russell, J.L., Carson, S.R., 2006. Midlatitude westerlies,
    atmospheric CO2, and climate change during the ice ages. Paleoceanography 21,
    PA2005.
    Woodruff, F., Savin, S.M., Douglas, R.G., 1980. Biological fractionation of oxygen
    and carbon isotopes by recent benthic foraminifera. Marine Micropaleontology 5,
    3-11.
    Wyrtki, K., 1962. The Subsurface Water Masses in the Western South Pacific Ocean.
    Marine and Freshwater Research 13, 18-47.
    Yu, J., Elderfield, H., 2008. Mg/Ca in the benthic foraminifera Cibicidoides
    wuellerstorfi and Cibicidoides mundulus: Temperature versus carbonate ion
    saturation. Earth and Planetary Science Letters 276, 129-139.
    口試委員
  • 沈川洲 - 召集委員
  • 李孟陽 - 委員
  • 米泓生 - 委員
  • 張詠斌 - 指導教授
  • 陳鎮東 - 指導教授
  • 口試日期 2012-07-23 繳交日期 2012-08-29

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