https://scholars.lib.ntu.edu.tw/handle/123456789/37201
Title: | 由沉積物穩定碳同位素分析探討臺灣西部過去二十萬年之氣候變遷 | Other Titles: | Climate change of past 200 kys in southwestern Taiwan: using stable carbon isotope analysis of core sediments | Authors: | 陳于高 | Keywords: | 嘉南平原;穩定碳同位素;碳氮比;氣候變遷;Chianan plain;Carbon Isotope;C/N ratio;locally environmental change | Issue Date: | 2001 | Publisher: | 臺北市:國立臺灣大學地質科學系暨研究所 | Abstract: | 本研究選擇臺灣西南嘉南平原地區 宅港、義竹、三寮灣岩心沈積物,以及端 成分的曾文溪河相及七股潟湖海相沈積 物,分析其中有機物質的碳氮比以及碳同 位素,以期能對臺灣西南海岸地區的環境 變化有更全面的瞭解。 由分析結果看來,此三岩心的碳氮比 以及碳同位素有良好對比,指示了臺灣西 南沿海地區在深海氧同位素地層stage2 到 stage1 早期經歷了一段較乾燥的氣候環 境。除此之外,由碳氮比以及碳同位素的 結果得知,此地區並有一些地區性的氣候 變化現象。 In this study, we measured the C/N ratio and d 13 C of San-liao-wan, Zai-kong and Yihju core sediments. Combining with C/N and d 13 C of the riverine sediments of Tseng-wen River and Chiku lagoon sediments as end members, the environmental change of southwestern Chianan plain can be clearly understood. Our results show a very good correlation between C/N and d 13 C. According to the d 13 C data, this coastal area went through a period of time that the d 13 C shift to a heavy value, implying that C4 plant was an important source of organic matters. The flourishing of C4 plant indicates that the climate was relatively arid from early OIS 2 to the early OIS 1. The scattered peaks show that although the profiles of C/N and d 13 C have good correlations, there are still some locally environmental changes. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/11771 | Other Identifiers: | 892116M002048 | Rights: | 國立臺灣大學地質科學系暨研究所 |
Appears in Collections: | 地質科學系 |
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892116M002048.pdf | 34.14 kB | Adobe PDF | View/Open |
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