Modelling Estuarine Biogeochemical Dynamics: From the Local to the Global Scale
Modelling Estuarine Biogeochemical Dynamics: From the Local to the Global Scale
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DOI：
10.1007/s10498-013-9218-3
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发表时间：
2013-11
影响因子：
1.6
通讯作者：
P. Régnier;S. Arndt;N. Goossens;C. Volta;G. Laruelle;R. Lauerwald;J. Hartmann
中科院分区：
文献类型：
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作者：
P. Régnier;S. Arndt;N. Goossens;C. Volta;G. Laruelle;R. Lauerwald;J. Hartmann
河口作为强有力的碳和营养过滤器，是大气CO2预算的相关贡献者。因此，它们在全球地球化学循环和气候中发挥着重要的作用，但受到的限制很少。本文综述了河口海洋地球化学动力学模拟的最新进展。第一部分概述了控制碳和营养盐沿着河口梯度转化和通量的主要物理和生态地球化学过程。它突出了河口的几何形状，流体动力学和标量传输之间的紧密联系，以及瞬态和非线性动力学的作用。最重要的生态地球化学过程，然后讨论的背景下，关键生态地球化学指标，如净生态系统代谢（NEM），空气-水CO2通量，营养过滤能力和元素收支。在本文的第二部分，我们说明，在当地的河口模拟研究的基础上，反应输运模型（RTMs）的理解和量化河口生态地球化学动力学的权力。我们展示了RTM和高分辨率数据的结合如何有助于解开复杂的过程相互作用，这是河口NEM，碳和营养盐通量的基础，以及如何这种方法可以提供综合评估的空气-水CO2通量沿着河流河口海岸带连续。此外，在河口生态地球化学动力学的趋势在河口的几何形状和环境情景进行了探讨，并讨论了在区域和全球尺度上提高河口碳和CO2动力学建模的背景下的结果。
Estuaries act as strong carbon and nutrient filters and are relevant contributors to the atmospheric CO2budget. They thus play an important, yet poorly constrained, role for global biogeochemical cycles and climate. This manuscript reviews recent developments in the modelling of estuarine biogeochemical dynamics. The first part provides an overview of the dominant physical and biogeochemical processes that control the transformations and fluxes of carbon and nutrients along the estuarine gradient. It highlights the tight links between estuarine geometry, hydrodynamics and scalar transport, as well as the role of transient and nonlinear dynamics. The most important biogeochemical processes are then discussed in the context of key biogeochemical indicators such as the net ecosystem metabolism (NEM), air–water CO2fluxes, nutrient-filtering capacities and element budgets. In the second part of the paper, we illustrate, on the basis of local estuarine modelling studies, the power of reaction-transport models (RTMs) in understanding and quantifying estuarine biogeochemical dynamics. We show how a combination of RTM and high-resolution data can help disentangle the complex process interplay, which underlies the estuarine NEM, carbon and nutrient fluxes, and how such approaches can provide integrated assessments of the air–water CO2fluxes along river–estuary–coastal zone continua. In addition, trends in estuarine biogeochemical dynamics across estuarine geometries and environmental scenario are explored, and the results are discussed in the context of improving the modelling of estuarine carbon and CO2dynamics at regional and global scales.