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南黄海浮游植物季节性变化的数值模拟与影响因子分析
引用本文:胡好国,万振文,袁业立.南黄海浮游植物季节性变化的数值模拟与影响因子分析[J].海洋学报,2004,26(6):74-88.
作者姓名:胡好国  万振文  袁业立
作者单位:国家海洋局, 第一海洋研究所, 山东, 青岛, 266061;海洋环境科学和数值模拟国家海洋局重点实验室, 山东, 青岛, 266061
基金项目:国家重点基础研究发展规划资助项目(2001CB409706),国家自然科学基金青年基金资助项目(40106003).
摘    要:用三维物理-生物耦合模式研究南黄海浮游植物(以叶绿素a为指标)的季节变化.对于物理模式采用Princeton ocean model(POM),对于生物模式考虑溶解无机营养盐(氮、磷、硅)、浮游植物、食草性浮游动物和碎屑.给定已知的初始场和外加边界强迫,模拟了观测到叶绿素a的主要时、空分布特征,如浮游植物的春、秋季水华和夏季次表层叶绿素a极大值现象等.研究表明,浮游植物春季水华最先发生于黄海中央海域,主要原因是该海域透明度较高,流速较小.春季水华开始于垂直对流减弱和层化开始形成之前(约3月底至4月上旬),显著地依赖水层的稳定性.水体层化以后(约5~9月)叶绿素a浓度高值区分布在南黄海的南部和锋区.夏季的南黄海中央海域,由于上混合层营养盐几乎耗尽,限制了浮游植物的生长,在紧贴温跃层下部的真光层,具有丰富的营养盐和合适的光照,次表层叶绿素a极大值得以形成.秋季(约9~11月份,略迟于海表面开始降温的时间,随地点不同而异)随垂直混合的增强,有利于营养盐向上输运,浮游植物出现一次较小的峰值.

关 键 词:物理-生物耦合模式    浮游植物    季节变化    南黄海
文章编号:0253-4193(2004)06-0074-15
收稿时间:2003/12/15 0:00:00
修稿时间:2004/5/30 0:00:00

Simulation of seasonal variation of phytoplankton in the southern Huanghai (Yellow) Sea and analysis on its influential factors
HU Hao-guo,WAN Zhen-wen and YUAN Ye-li.Simulation of seasonal variation of phytoplankton in the southern Huanghai (Yellow) Sea and analysis on its influential factors[J].Acta Oceanologica Sinica (in Chinese),2004,26(6):74-88.
Authors:HU Hao-guo  WAN Zhen-wen and YUAN Ye-li
Affiliation:First Institute of Oceanography, State Oceanic Administration, Qingdao 266061;Key Laboratory of Marine Science and Numerical Modeling of State Oceanic Administration, Qingdao 266061, China
Abstract:The annual cycle of phytoplankton dynamics in the southern Huanghai Sea is studied by a three-dimensional physical-biological model. The physical model is Princeton ocean model (POM), the biological model involves interactions between the inorganic nutrients (nitrogen, phosphate, silicate), phytoplankton and herbivorous zooplankton biomass, and detritus. Given a knowledge of physical forcing, the model simulates main observed seasonal characteristic features, in particular, the annual cycle of phytoplankton with the spring and fall blooms, and the subsurface phytoplankton maximum layer in summer. Initiation of the spring bloom is shown to be critically dependent on the water column stability. It commences as soon as the convective mixing process weakens and before the seasonal stratification of surface begins to develop (in earlier April). At the time of establishment of the seasonal thermocline from May to October, the nutrient concentrations in the mixed layer are low enough to limit production in the center of the South Huanghai Sea, the layer between the thermocline and the base of the euphotic zone provides sufficient light and nutrients to support subsurface phytoplankton development. The fall bloom takes place sometime between September and November depending on environmental conditions.
Keywords:physical-biological model  phytoplankton  annual cycle  southern Huanghai Sea
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