Incorporating dynamic root growth enhances the performance of Noah‐MP at two contrasting winter wheat field sites
Incorporating dynamic root growth enhances the performance of Noah‐MP at two contrasting winter wheat field sites
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DOI：
10.1002/2013wr014634
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发表时间：
2014-02
影响因子：
5.4
通讯作者：
S. Gayler;T. Wöhling;Matthias Grzeschik;J. Ingwersen;H. Wizemann;K. Warrach‐Sagi;P. Högy;S. Attinger;T. Streck;V. Wulfmeyer
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作者：
S. Gayler;T. Wöhling;Matthias Grzeschik;J. Ingwersen;H. Wizemann;K. Warrach‐Sagi;P. Högy;S. Attinger;T. Streck;V. Wulfmeyer
在预测水文地质系统、农业系统、天气和气候中的水通量时，需要密切关注土壤、植被和大气边界层之间的相互作用。然而，在大尺度模式中使用的陆面方案在一致地模拟从地下通过植被层到大气的水和能量通量方面仍然存在不足。在这项研究中，多物理场版本的诺亚陆面模式（Noah-MP）被用来识别的过程，这是最关键的同时模拟陆面和低层大气之间的水和热通量。综合现场数据集的潜热和显热通量，地面热通量，土壤水分，叶面积指数从两个对比现场在西南德国的模拟精度进行评估。结果表明，植被相关过程的充分代表性是土壤-植物-大气系统中能量和水通量一致模拟的最重要控制。特别是，使用一个新实现的子模块来模拟根系生长动态，提高了Noah‐MP的性能。我们的结论是，叶面积动态和根/土壤水分相互作用的代表性的进一步发展是最有前途的起点，为改善模拟的底土，地表和大气之间的反馈完全耦合的水文和大气模型。
Interactions between the soil, the vegetation, and the atmospheric boundary layer require close attention when predicting water fluxes in the hydrogeosystem, agricultural systems, weather, and climate. However, land‐surface schemes used in large‐scale models continue to show deficiencies in consistently simulating fluxes of water and energy from the subsurface through vegetation layers to the atmosphere. In this study, the multiphysics version of the Noah land‐surface model (Noah‐MP) was used to identify the processes, which are most crucial for a simultaneous simulation of water and heat fluxes between land surface and the lower atmosphere. Comprehensive field data sets of latent and sensible heat fluxes, ground heat flux, soil moisture, and leaf area index from two contrasting field sites in South‐West Germany are used to assess the accuracy of simulations. It is shown that an adequate representation of vegetation‐related processes is the most important control for a consistent simulation of energy and water fluxes in the soil‐plant‐atmosphere system. In particular, using a newly implemented submodule to simulate root growth dynamics has enhanced the performance of Noah‐MP. We conclude that further advances in the representation of leaf area dynamics and root/soil moisture interactions are the most promising starting points for improving the simulation of feedbacks between the subsoil, land surface and atmosphere in fully coupled hydrological and atmospheric models.