碩士 / 國立臺灣海洋大學 / 應用地球科學研究所 / 99 / Marine primary production variability plays an essential role in modulating global carbon cycle that is a key component in regional/global climate changes. Estimating late Quaternary primary production by the uses of faunal-based transfer functions with modern satellite primary production data derived from chlorophyll a concentration has been successfully applied for the northern Indian Ocean and equatorial Pacific. However, few studies have been conducted for the western Pacific warm pool. Here we attempt to establish a paleo-productivity transfer function for estimating paleo-primary production in the tropical Indian and Pacific. We have compiled western Pacific and Indian coretop fauna data from the MARGO project (Multiproxy Approach for the Reconstruction of the Glacial Ocean Surface) and calibrated the fauna data by SeaWiFS data of chlorophyll a concentrations (1998-2007) for each coretop. In order to understand the sensitivities and accuracies of different methods for primary production estimates, we applied Imbrie-Kipp transfer function (IKTF) and Modern Analogus Technique (MAT) with different species abundance data of planktic foraminifer assemblages, or with different geographic subsets of coretop data. Our results indicate that the transfer function using 28 species abundance data is obviously better than that of 11 species. However, using different inputs of geographic subsets of coretops shows minor, insignificant differences in the performance of transfer function estimates. Therefore we consider the geographic distribution of coretops is not important and the whole western Pacific and Indian coretop data for calibration would be an optimum choice. We applied this transfer function applied to a western Pacific warm pool core MD052928, and found primary productivity changes on glacial to interglacial time scales are controlled regional current and upwelling, which are in response to changes in sea-levels.
| Identifer | oai:union.ndltd.org:TW/099NTOU5135005 |
| Date | January 2011 |
| Creators | WAN-TING YEN, 言婉婷 |
| Contributors | MIN-TE CHEN, 陳明德 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 111 |
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