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博碩士論文 etd-0620101-105039 詳細資訊
Title page for etd-0620101-105039
論文名稱
Title
台灣海峽海水氧同位素組成之時空分佈變化
Spatial and Temporal Variation of 18O in the Sea Water from the Taiwan Strait
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
114
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2000-06-27
繳交日期
Date of Submission
2001-06-20
關鍵字
Keywords
水團混合、海洋物理、呂宋海峽、海洋化學、台灣海峽、黑潮、南海、氧同位素、海水、東海、盒子模式
seawaters, South China Sea, box model, Luzon Strait, oxygen isotope, Kuroshio, East China Sea, Taiwan Strait
統計
Statistics
本論文已被瀏覽 5791 次,被下載 1571
The thesis/dissertation has been browsed 5791 times, has been downloaded 1571 times.
中文摘要
台灣海峽介於台灣與中國大陸之間,長約300公里,寬約180~200公里,平均水深60公尺,為連接東海與南海的渠道。就海底地形而言,西淺東深,中央以雲彰隆起將台灣海峽切割成南北兩個部分。
本研究於1999年5月(春)、8月(夏)及11月(秋)及2000年3月(冬)代表四季分別出海採樣。從一年的採樣資料上顯示,台灣海峽的水文變化除受地形及季風影響外,主要是受到黑潮分支、南海水及大陸沿岸水所影響。研究中顯示,春季時台灣海峽主要以黑潮水為主,大陸沿岸水僅在西北部可見到局部之分佈;夏季時台灣海峽則主要以南海水為主,黑潮水的訊號僅在海峽南部及底層出現,大陸沿岸水因時值豐水期,分布範圍較春季為大,但仍只侷限於海峽西北部;秋、冬兩季海峽南部則以黑潮水為主,北部則為東北季風所帶來的大陸沿岸水所盤據,二者在海峽中部形成一對峙之鋒面。
在澎湖水道的水文變化,黑潮分支沿著澎湖水道進入台灣海峽,以秋、冬兩季最為明顯;在夏季時澎湖水道上層海水主要以南海水為主,但底層仍為高溫高鹽的黑潮水
。研究中顯示黑潮分支一年四季皆有進入至澎湖水道。
重新估算東海盒子模式的過程中,將台灣海峽以每年1.58*104km3/year(約0.5Sv)進入東海,並將黑潮分成表層水(0-50m)及次表層湧昇水(150m)分別帶入,估算結果顯示從黑潮表層水進入東海約為0.58*104km3/year,次表層水則約為1.54*104km3/year,從東海陸棚輸出西太平洋的水量,約為3.83*104km3/year。
Abstract
This study utilized, for the first time, the d18Osw as a tracer to investigate the seasonal variations of circulation in the Taiwan Strait (TS), which is the predominant sea passage with an average depth of 60 m connecting the East China Sea (ECS) and the South China Sea (SCS). The result shows that the circulation system in TS is mainly influenced by the inter-mixing among the China Coastal Water (CCW), the SCS water (SCSW), and the Kuroshio Water (KW). In spring, the KW dominates in TS, whereas the CCW is still observed in northwest TS. During the summer, SCSW replaces the KW and becomes the major water type in the TS, yet the KW is found to be restricted in the southwest part and the bottom of the TS. Due to the larger discharge from rivers (mainly the Yangtz River), the CCW has a more extensive distribution in the TS in summer than other seasons. In fall and winter, the CCW occupies the northern part of TS due to the stronger northeastern monsoon which limits the intrusion of the KW through the Luzon Strait to the northern TS. The two distinct water types inevitably form a front in the central TS.

The hydrographic variations at Penghu Channel (PHC) were also explored in this study. The d18Osw indicates that the perennial intrusion of the KW into the PHC is varying throughout different seasons. This intrusion is found strongest in fall and winter. In summer, the upper layer of PHC is occupied chiefly by SCSW, while the KW remains at the bottom layer in PHC.

By including an additional inflow of 0.5Sv from TS to ECS, this study further reconstructed a box model of the ECS, which was previously furnished by Lin(1999). The new estimates suggest that ~0.38*104 km3/year of the Kuroshio surface water (0-50m) and ~1.54*104 km3/year of the upwelled Kuroshio subsurface water (50-150m) are transported to the ECS, while ~3.83*104 km3/year of the ECS water are exported to the western Pacific Ocean.
目次 Table of Contents
誌謝…………………………………………………………………I
中文摘要……………………………………………………………III
英文摘要……………………………………………………………V
目錄…………………………………………………………………VII
圖目錄………………………………………………………………IX
表目錄………………………………………………………………XI
附錄目錄……………………………………………………………XII
一、前言……………………………………………………………1
1.1研究目的…………………………………………………1
1.2研究背景…………………………………………………3
1.3前人對台灣海峽的研究…………………………………5
1.4海水氧同位素組成變化之控制因素……………………9
二、研究方法………………………………………………………12
2.1測站位置及採樣方法……………………………………12
2.2實驗方法…………………………………………………12
2.3海水氧同位素值之校正…………………………………15
三、研究資料及資料分析結果……………………………………16
3.1四季海水表溫衛星遙測(SST)描述…………………….16
3.2台灣海峽風場描述………………………………………19
3.3四季航次水文資料描述…………………………………21
3.3.1春季航次水文資料描述………………………………21
3.3.2 夏季航次水文資料描述…………………………….26
3.3.3 秋季航次水文資料描述…………………………….33
3.3.4 冬季航次水文資料描述…………………………….33
3.4台灣海峽海水氧同位素組成之四季變化………………41
3.4.1 春季台灣海峽海水氧同位素組成變化…………….41
3.4.2夏季台灣海峽海水氧同位素組成變化………………41
3.4.3 秋季台灣海峽海水氧同位素組成變化…………….42
3.4.4 冬季台灣海峽海水氧同位素組成變化…………….43
四、結果與討論……………………………………………………44
4.1台灣海峽四季水文之時空變化…………………………44
4.1.1 台灣海峽四季表水氧同位素值與鹽度的關係…….44
4.1.2 台灣海峽鹽度與氧同位素的關係………………….47
4.1.3 小結………………………………………………….49
4.2 澎湖水道水文之時空變化…………………………….50
4.2.1 從溫、鹽資料看澎湖水道………………………….50
4.2.2 澎湖水道鹽度與氧同位素值……………………….53
4.2.3 黑潮於澎湖水道之混合百分比…………………….55
4.3 東海盒子模式(Box Model)……………………………60
4.3.1 模式建立…………………………………………….61
4.3.2 參數選定…………………………………………….63
4.3.3 計算結果…………………………………………….68
伍、結論……………………………………………………………72
陸、參考文獻………………………………………………………74
附錄一、海水氧同位素參考工作標本分析值及其精確度………81
附錄二、台灣海峽四季水文資料及氧同位素數據………………84
附錄三、典型南海水水文資料及海水氧同位素值………………97
附錄四、典型黑潮水水文資料及海水氧同位素值………………98
附錄五、台灣海峽研討會論文集摘要……………………………99
參考文獻 References
6.1中文參考文獻
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