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 £UREE/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¢J 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 £UREEs/Ca values are usually well correlated with old and poor ventilated water masses. In our record, higher £UREEs/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.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0829112-122454 |
| Date | 29 August 2012 |
| Creators | Feng, Chun-Chin |
| Contributors | Mon-Young Lee, Chen-Tung Arthur Chen, Yuan-Pin Chang, Chuan-Chou Shen, Horng-Sheng Mii |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0829112-122454 |
| Rights | unrestricted, Copyright information available at source archive |
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