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首页> 外文期刊>Geoscientific Model Development >Ecological ReGional Ocean Model with vertically resolved sediments (ERGOM?SED?1.0): coupling benthic and pelagic biogeochemistry of the south-western Baltic Sea
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Ecological ReGional Ocean Model with vertically resolved sediments (ERGOM?SED?1.0): coupling benthic and pelagic biogeochemistry of the south-western Baltic Sea

机译：具有垂直分解沉积物的生态区域海洋模型（ERGOM？SED？1.0）：波罗的海西南部的底栖生物和上层生物地球化学耦合

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Sediments play an important role in organic matter mineralisation and nutrient recycling, especially in shallow marine systems. Marine ecosystem models, however, often only include a coarse representation of processes beneath the sea floor. While these parameterisations may give a reasonable description of the present ecosystem state, they lack predictive capacity for possible future changes, which can only be obtained from mechanistic modelling. This paper describes an integrated benthic–pelagic ecosystem model developed for the German Exclusive Economic Zone (EEZ) in the western Baltic Sea. The model is a hybrid of two existing models: the pelagic part of the marine ecosystem model ERGOM and an early diagenetic model by Reed et al.?(2011). The latter one was extended to include the carbon cycle, a determination of precipitation and dissolution reactions which accounts for salinity differences, an explicit description of the adsorption of clay minerals, and an alternative pyrite formation pathway. We present a one-dimensional application of the model to seven sites with different sediment types. The model was calibrated with observed pore water profiles and validated with results of sediment composition, bioturbation rates and bentho-pelagic fluxes gathered by in situ incubations of sediments (benthic chambers). The model results generally give a reasonable fit to the observations, even if some deviations are observed, e.g. an overestimation of sulfide concentrations in the sandy sediments. We therefore consider it a good first step towards a three-dimensional representation of sedimentary processes in coupled pelagic–benthic ecosystem models of the Baltic Sea.
机译：沉积物在有机物矿化和养分循环中起着重要作用，尤其是在浅海系统中。但是，海洋生态系统模型通常仅包括海床以下过程的粗略表示。虽然这些参数化可以合理地描述当前的生态系统状态，但它们缺乏对未来可能发生的变化的预测能力，这只能从机械建模中获得。本文描述了为波罗的海西部的德国专属经济区（EEZ）开发的底栖-上层生态系统综合模型。该模型是两个现有模型的混合体：海洋生态系统模型ERGOM的远洋部分和Reed等人（2011）的早期成岩模型。后者扩展到包括碳循环，确定盐度差异的沉淀和溶解反应，对粘土矿物吸附的明确描述以及另一种黄铁矿形成途径。我们介绍了该模型对一类不同沉积物类型的七个地点的一维应用。利用观察到的孔隙水剖面对模型进行校准，并通过沉积物（底栖室）的原位培养收集的沉积物组成，生物扰动速率和底栖浮游通量的结果进行验证。即使观察到一些偏差，例如，模型结果通常也可以合理地拟合到观察结果。高估了沙质沉积物中的硫化物浓度。因此，我们认为这是朝波罗的海中上层-底栖生态系统耦合模型中的沉积过程进行三维表示的第一步。

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