碩士 / 國立臺灣海洋大學 / 海洋環境化學與生態研究所 / 101 / Marine primary production is not only the base of the food chain, it also has the functions of absorbing carbon dioxide and regulating climate. The key in this study, climate changing on marine system operation, is to understand the effects of atmospheric forcing on the primary production. Although there are many researches that indicate the effects of atmospheric duststorm can increase the primary productivity in the high nutrient low chlorophyll sea area, there are only few studies for low nutrient low chlorophyll sea area. Five spring cruises between year 2005 (03/20-22, 04/14) and 2006 (03/16-18, 03/21-23, 03/29-30) were investigated. Hydrography, nutrients, chlorophyll and primary productivity data observed from the cruises were used to study the effect of atmospheric forcing on primary production in the Kuroshio water northeast off Taiwan. The result of surface photosynthetic active radiation, mean wind speed and mean PM10 was 15.6~74.7 Einstein m-2 d-1, 3~13 m s-1, 31~137 µg m-3. Further studies have shown that the surface photosynthetic active radiation above 60 or below 20 Einstein m-2 d-1 restrain the primary production. Exclude of the light limit, the dramatic changes in productivity based on the strength of the wind speed showed a significant positive correlation, but PM10 did not correlated. Dust settlement for primary production contributed only about 2.7 %. Inference of the spring dust storm on the oligotrophic Kuroshio Sea affecting the level of productivity was mainly caused by wind-driven water disturbance that control the mechanism of upward transport of nutrients.
| Identifer | oai:union.ndltd.org:TW/101NTOU5282006 |
| Date | January 2013 |
| Creators | Chia-Hua Yang, 楊佳樺 |
| Contributors | Gwo-Ching Gong, 龔國慶 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 62 |
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