2019-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/693698摘要：北極海在全球氣候系統中扮演了一個相當重要的角色，然而我們對於長時間尺度下北極海與低緯度地區交互作用的瞭解是十分有限的。將極地古海洋紀錄與低緯地區古氣候紀錄聯繫起來的主要障礙是對於定年結果的了解。在本次的雙邊合作中，台灣方面的主要目標是結合放射性碳定年法與鏷-釷定年的資料，藉此改進北極海中部海洋沉積物的年代模型。若測定樣品的年齡為近45.000年，放射性碳定年法能利用浮游有孔蟲提供非常精準的定年結果，而鏷-釷定年則是能回朔到最後一次間冰期(Eemian, 130-115 ky)的定年結果。利用這個改進的年代模型，我們能艮進一步瞭解北極在全球氣候系統所扮演的角色。德國方面將會打焦點放在建立東南亞區域之高解析度、精準定年的資料。上述雙邊的方法及結果的整合能更有效暸解高緯及低緯地區在全球氣候系統的關聯性。 <br> Abstract: The Arctic Ocean plays an important role in the global climate system. However, on longer time scales, our understanding of the interactions between the Arctic and low latitude components of the global climate system is limited. The main obstacle for tying paleoceanographic records from the Arctic to low-latitude paleoclimate records is due to limitations in age control. The goal of the proposed collaborative project from the Taiwanese side is to improve the age models for a number of marine sedimentary records from the central Arctic Ocean through the combination radiocarbon dating and the application of Protactinium-Thorium dating. While radiocarbon dating allows precise age control of the last 45.000 years or so to be established based on planktonic foraminifera, the Pa/Th dating will allow ages back to at least the last interglacial (Eemian, 130-115 ky) to be assessed. With the improved age models, a much better understanding of the Arctic’s role in the climate system can be obtained. From the German side, focus will lie on establishing high-resolution, well-dated records from the SE Asian region. The combination of these approaches will allow the teleconnections between to high- and low-latitude components of the climate system to be addressed北極海氣候變遷全球變化海冰年代地層學放射性同位素Arctic Oceanclimate changeglobal changesea icechronostratigraphyradiogenic isotopes