English  |  正體中文  |  简体中文  |  Items with full text/Total items : 26988/38789
Visitors : 2320597      Online Users : 46
RC Version 4.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Adv. Search
LoginUploadHelpAboutAdminister

Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24915

Title: The last 100,000 years paleoceanographic records of core MD012404 from the Okinawa Trough
沖繩海槽沉積物岩心MD012404顯示之近十萬年古海洋
Authors: Chang Y.-P.;H.-H. Weng;M.-T. Chen
Contributors: NTOU:Institute of Applied Geosciences
國立臺灣海洋大學:應用地球科學研究所
Keywords: East China Sea;Okinawa Trough;Kuroshio;East Asian Monsoon
地調所彙刊第22號;東海;沖繩海槽;黑潮;東亞季風
Date: 2009
Issue Date: 2011-10-20T08:18:13Z
Publisher: Bulletin of Central Geological Survey
Abstract: Several high-resolution proxy indexes are established for indicating the paleoclimatic and paleoenvironmental variations of the East China Sea (ECS) from sediment samples of core MD012404 drilled in the Okinawa Trough (OT). Records of microfossil assemblages from foraminifera and diatoms inferred that influences of the Kuroshio in the OT might start at approximately 50-60 thousand years ago. Accompanied with a tectonic event of the Yonaguni Depression formed in this period, a passage might have been opened and facilitated Kuroshio drainage to enter the OT. In the period of the last glacial maximum, a lowering of the global sea level and/or global cooling would reduce the flow volume or restrict the Kuroshio’s drainage into the OT. The Kusoshio was intruded into the OT at least at ~16 thousand years ago which was encouraged by a gradual rising of the global sea level. Total organic components (TOC) of sediments from the OT might indicate the surface productivity of the ECS. Co-varied patterns of the TOC data and precipitation records on land revealed that the increased production of the ECS might indicate an enhanced East Asian summer monsoon. Warm and humid climatic conditions on land would increase the fresh water output to the ECS and then encourage the export and/or upwelling of nutrients to rise to the surface production. Results of this research point out that environmental changes in the ECS are effected by global changes, and the OT is a good study region to monitor the variations in the earth’s climate system.
Relation: 22, pp.125-168
URI: http://ntour.ntou.edu.tw/handle/987654321/24915
Appears in Collections:[應用地球科學研究所] 期刊論文

Files in This Item:

There are no files associated with this item.



All items in NTOUR are protected by copyright, with all rights reserved.

 


著作權政策宣告: 本網站之內容為國立臺灣海洋大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用,請合理使用本網站之內容,以尊重著作權人之權益。
網站維護: 海大圖資處 圖書系統組
DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback