Parameter sensitivity study of the biogeochemical model in the China coastal seas

JI Xuanliang; LIU Guimei; GAO Shan; WANG Hui

doi:10.1007/s13131-015-0762-0

中国近海生态动力学模型参数敏感性研究

doi: 10.1007/s13131-015-0762-0

国家海洋环境预报中心, 北京 100081, 中国;国家海洋局海洋灾害预报技术研究重点实验室, 北京 100081, 中国

基金项目: The National Natural Science Foundation of China under contract Nos 41206023, 41222038 and 41076011; the National Basic Research Project (973 Program) of China under contract No. 2011CB403606; the China-Korea Joint Ocean Research Center "Cooperation on the Development of Basic Technologies for the Yellow Sea and East China Sea Operational Oceanographic System (YOOS)"; the Public Science and Technology Research Funds Projects of Ocean under contrcat No. 201205018; the "Strategic Priority Research Program" of the Chinese Academy of Sciences,under contract No. XDA01020304.

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- 收稿日期: 2015-07-20
- 修回日期: 2015-09-21

Parameter sensitivity study of the biogeochemical model in the China coastal seas

National Marine Environmental Forecasting Center, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Beijing 100081, China

摘要

摘要: 本文基于包含12个生态变量的生态模型,建立了高分辨率三维物理-生物地球化学模型,优化改进了浮游植物死亡过程和浮游动物摄食过程方程,分析了中国近海海洋生态环境变化特征,进行了生态参数敏感性实验。结果表明,生态模型中浮游植物浓度存在4个最敏感生态参数,即浮游动物的吸收率(ZooAE_N),浮游动物的新陈代谢率(ZooBM),浮游动物的最大比生长率(μ20)和叶绿素与浮游植物的最大比率(Chl2C_m),敏感率均超过了90%。进一步讨论和分析了生态模型对不同生态参数值的敏感范围。结果表明浮游动物的最大比生长率、浮游植物吸收硝酸盐的半饱和系数和小型碎屑再矿化率的敏感区间分别为0.1-1.2d^-1,0.1-1.5(mmol/m³)^-1和0.01-0.1d^-1。基于SEATS站点从1998年9月到2000年7月的观测数据,对生态模型模拟结果进行了校验。结果表明基于参数优化后的生态模型可以节省计算资源,也可以有效地再现中国近海海洋生态过程特征。
- 中国近海 /
- 生物地球化学模型 /
- 参数敏感性
Abstract: In order to develop a coupled basin scale model of ocean circulation and biogeochemical cycling, we present a biogeochemical model including 12 components to study the ecosystem in the China coastal seas (CCS). The formulation of phytoplankton mortality and zooplankton growth are modified according to biological characteristics of CCS.The four sensitivity biological parameters, zooplankton assimilation efficiency rate (ZooAE_N), zooplankton basal metabolism rate (ZooBM), maximum specific growth rate of zooplankton (μ₂₀) and maximum chlorophyll to carbon ratio (Chl2C_m) are obtained in sensitivity experiments for the phytoplankton, and experiments about the parameter μ₂₀, half-saturation for phytoplankton NO₃ uptake (K_NO₃) and remineralization rate of small detritusN (SDeRRN) are conducted. The results demonstrate that the biogeochemical model is quite sensitive to the zooplankton grazing parameter when it ranges from 0.1 to 1.2 d^-1. The K_NO₃ and SDeRRN also play an important role in determining the nitrogen cycle within certain ranges.The sensitive interval of KNO₃ is from 0.1 to 1.5(mmol/m³)^-1, and interval of SEdRRN is from 0.01 and 0.1 d^-1. The observational data from September 1998 to July 2000 obtained at SEATS station are used to validate the performance of biological model after parameters optimization. The results show that the modified model has a good capacity to reveal the biological process features, and the sensitivity analysis can save computational resources greatly during the model simulation.
- China coastal seas /
- biogeochemical model /
- parameter sensitivity

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文章访问数: 1225
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PDF下载量: 1480
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中国近海生态动力学模型参数敏感性研究

doi: 10.1007/s13131-015-0762-0

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Parameter sensitivity study of the biogeochemical model in the China coastal seas

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