关键物理过程对黄、渤海浮游生物影响的现象分析与模式研究

IOCAS-IR > 海洋环流与波动重点实验室

	关键物理过程对黄、渤海浮游生物影响的现象分析与模式研究
其他题名	Phenomenon analysis and modeling study on the key physical processes impacts on the plankton in the Yellow Sea & Bohai Sea
	刘桂梅
学位类型	博士
	2002
学位授予单位	中国科学院海洋研究所
学位授予地点	中国科学院海洋研究所
学位专业	物理海洋学
关键词	中华哲水蚤浮游植物生态系统动力学渤海环流数值模拟生源要素
摘要	论文采用国际GLOBEC现有的研究思路:现场观测-过程分析-模型研究.生物资料分析根据黄海春、秋季两个航次的海上调查,分析了跨海洋锋区的中华哲水蚤和叶绿素a的垂直分布.模型研究中首先对渤海环流的物理机制进行了研究.得出潮余流、密度余流是渤海春末夏初环流的重要组成部分,风场是导致整个渤海春季环流改变的重要因素,发现风场随时间的交替变化也是影响渤海环流数值模拟结果的关键因素.
其他摘要	To examine the physical processes impacts on the biological processes, we follow the idea of GLOBEC focusing on three steps: field survey, process analysis and modeling study. By analyzing the abundance distribution of the Calamis sinicus at the fronts in the two surveys, we try to find the direct dominant physical processes. And on the basis of that, provide a simple coupled physical and biological model and apply it in the Bohai Sea. The position of the tidal fronts and vertical circulation structure near the fronts are examined using the Blumberg & Mellor 3D nonlinear numerical coastal circulation model incorporating with Mellor & Yaraada level 2.5 turbulent closure model. Vertical distribution of phytoplankton biomass and numerical abundance of Calamis sinicus were investigated across the tidal fronts in the Yellow sea, in October 2000 and May 2001. The abundance of Calamis sinicus was higher at the frontal region than at the adjacent stratified and mixed areas while the Chlorophyll-a concentration was highest in the stratified area or mixed area adjacent frontal region. By combining with the simulation result of the vertical circulation structure, we propose that the factors induced the distribution difference of Calamis sinicus and Chlorophyll-a concentration not only include the grazing activities, vertical circulation structure at the fronts also plays an important role. The circulation of Bohai Sea in spring is examined to provide a reliable physical environment for biological model. The model results indicate that the tidal residual current, density residual current has contribution to the springtime flow in the Bohai Sea while the wind stress is an dominant process in driving the flow. And also the model results suggest the importance of the wind variation to the whole circulation, especially for numerical study. A 3D coupled physical and biological model was used to examine the marine ecosystem of the Bohai Sea. The biological model described a simple, nitrate and phosphate based, lower trophic food web system. The model results indicated that the eddies induced by the baroclinic effect had the contribution to the patch distribution of the phytoplankton. A phytoplankton bloom may occur at the mouth of the river due to the high nutrient concentration because of the fresh water discharge. The wind variation has significant impact on the phytoplankton distribution at Laizhou Bay. Vertically, tidal mixing had a direct impact on the distributions of nutrients and phytoplankton. Nutrients and phytoplankton were well mixed vertically by tidal mixing. The vertical circulation structure at the center of the Yellow Sea Cold Water Mass is still not so clear. Since Calamts sinicus always stays in the Yellow Sea Cold Water Mass in summer, it's urgent to find out the relationship between them. More work is needed to apply the coupled model in the Yellow Sea and study the transportation of the nutrient at the front zone and upwelling zone. And also the biological parameters and the climatologic data, such as the wind variation, irradiance, net heat flux, need to be improved to get a more realistic result.
页数	104
语种	中文
文献类型	学位论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/1031
专题	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	刘桂梅. 关键物理过程对黄、渤海浮游生物影响的现象分析与模式研究[D]. 中国科学院海洋研究所. 中国科学院海洋研究所,2002.

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