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首页> 外文期刊>ICES Journal of Marine Science >Seasonal And Interannual Variability Of Primary And Export Production In The South China Sea: A Three-dimensional Physical-biogeochemical Model Study
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Seasonal And Interannual Variability Of Primary And Export Production In The South China Sea: A Three-dimensional Physical-biogeochemical Model Study

机译：南海初级产品和出口产品的季节和年际变化：三维物理生物地球化学模型研究

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摘要

To investigate the seasonal and interannual variations in biological productivity in the South China Sea (SCS), a Pacific basin-wide physical-biogeochemical model has been developed and used to estimate the biological productivity and export flux in the SCS. The Pacific circulation model, based on the Regional Ocean Model Systems (ROMS), is forced with daily air-sea fluxes derived from the NCEP (National Centers for Environmental Prediction) reanalysis between 1990 and 2004. The biogeochemical processes are simulated with a carbon, Si(OH)_4, and nitrogen ecosystem (CoSiNE) model consisting of silicate, nitrate, ammonium, two phytoplankton groups (small phytoplankton and large phytoplankton), two zooplankton grazers (small micrograzers and large mesozooplankton), and two detritus pools. The ROMS-CoSiNE model favourably reproduces many of the observed features, such as Chl a, nutrients, and primary production (PP) in the SCS. The modelled depth-integrated PP over the euphotic zone (0-125 m) varies seasonally, with the highest value of 386 mgCm~(-2)d~(-1) during winter and the lowest value of 156 mg C m~(-2) d~(-1) during early summer. The annual mean value is 196 mg C m~(-2) d~(-1). The model-integrated annual mean new production (uptake of nitrate), in carbon units, is 64.4 mg C m~(-2) d~(-1), which yields an f-ratio of 0.33 for the entire SCS. The modelled export ratio (e-ratio: the ratio of export to PP) is 0.24 for the basin-wide SCS. The year-to-year variation of biological productivity in the SCS is weaker than the seasonal variation. The large phytoplankton group tends to dominate over the smaller phytoplankton group, and likely plays an important role in determining the interannual variability of primary and new production.
机译：为了调查南中国海（SCS）生物生产力的季节性和年际变化，已开发了一个太平洋盆地范围的物理生物地球化学模型，并用于估算南海的生物生产力和出口通量。基于区域海洋模型系统（ROMS）的太平洋环流模型被强迫使用1990年至2004年间NCEP（国家环境预测中心）再分析得出的每日海气通量。生物地球化学过程用碳模拟， Si（OH）_4和氮生态系统（CoSiNE）模型由硅酸盐，硝酸盐，铵，两个浮游植物群（小型浮游植物和大型浮游植物），两个浮游动物放牧者（小型微掠食者和大型中游浮游动物）和两个碎屑池组成。 ROMS-CoSiNE模型可以很好地重现SCS中许多观察到的特征，例如Chla，养分和初级生产（PP）。在常温区（0-125 m）上模拟的深度积分PP随季节变化，冬季最高值为386 mgCm〜（-2）d〜（-1），最低值为156 mg Cm〜（ -2）初夏时d〜（-1）。年平均值为196 mg C m〜（-2）d〜（-1）。模型综合的年平均新生产量（硝酸盐的吸收量）以碳单位为64.4 mg C m〜（-2）d〜（-1），整个SCS的f值为0.33。流域范围的SCS的模型出口比率（e比率：出口与PP的比率）为0.24。 SCS中生物生产力的逐年变化要弱于季节性变化。较大的浮游植物群往往比较小的浮游植物群更占优势，并且可能在决定初级和新生产的年际变化中起重要作用。

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