A Scale-Consistent Terrestrial Systems Modeling Platform Based on COSMO, CLM, and ParFlow
A Scale-Consistent Terrestrial Systems Modeling Platform Based on COSMO, CLM, and ParFlow
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DOI：
10.1175/mwr-d-14-00029.1
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发表时间：
2014-08
影响因子：
3.2
通讯作者：
P. Shrestha;M. Sulis;M. Masbou;S. Kollet;J. Forschungszentrum;Geoverbund Abc
中科院分区：
文献类型：
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作者：
P. Shrestha;M. Sulis;M. Masbou;S. Kollet;J. Forschungszentrum;Geoverbund Abc
提出了一个高度模块化和尺度一致的地面系统建模平台（TerrSysMP）。该模型平台包括一个大气模型（Consortium for Small-Scale modeling； COSMO）、一个陆地表面模型（ncarcommunityyland model,version3.5; CLM3.5）和三维变饱和地下水流动模型（ParFlow）。采用具有多种可执行方法的外部耦合器（Ocean - Atmosphere - Sea - Ice - Soil, version 3.0; OASIS3）来耦合三个独立开发的分量模型，这在本质上允许分离时空建模尺度和分量模型之间的耦合频率。提出了理想化的terrsysmp模拟，其重点是关键水文过程的相互作用，如不同水文模拟尺度下的径流产生（过量降雨和饱和）以及通过地下水抽水导致的地下水位下降，以及大气边界层过程。结果表明，地表-地下水动力学、生物地球物理过程和边界层演化之间存在很强的联系。在水文成分模型中使用马赛克方法（以解决亚网格尺度的地形）会影响模拟的径流生成、土壤水分再分配和边界层演变，这表明了水文建模尺度的重要性，从而表明了本研究中使用的耦合方法的优势。使用TerrSysMP对德国鲁尔流域进行了真实数据模拟。地表-地下水综合流动模式的加入导致地表油水的系统模式，从而影响交换通量分布和随后的大气边界层发展。在与观测数据的第一次比较中，与1D模型相比，3D模型对地表通量的预测略有改进，对初始土壤水分含量的敏感性很强。
A highly modular and scale-consistent Terrestrial Systems Modeling Platform (TerrSysMP) is presented. The modeling platform consists of an atmospheric model (Consortium for Small-Scale Modeling; COSMO), a land surface model (the NCARCommunityLand Model,version3.5; CLM3.5), anda 3D variablysaturated groundwater flow model (ParFlow). An external coupler (Ocean Atmosphere Sea Ice Soil, version 3.0; OASIS3) with multiple executable approaches is employed to couple the three independently developed component models, which intrinsically allows for a separation of temporal‐spatial modeling scales and the coupling frequencies between the component models. IdealizedTerrSysMPsimulations arepresented,whichfocuson theinteractionofkey hydrologic processes, like runoff production (excess rainfall and saturation) at different hydrological modeling scales and the drawdown of the water table through groundwater pumping, with processes in the atmospheric boundary layer. The results show a strong linkage between integrated surface‐groundwater dynamics, biogeophysical processes, and boundary layer evolution. The use of the mosaic approach for the hydrological component model (to resolve subgrid-scale topography) impacts simulated runoff production, soil moisture redistribution, and boundary layer evolution, which demonstrates the importance of hydrological modeling scales and thus the advantages of the coupling approach used in this study. Real data simulations were carried out with TerrSysMP over the Rur catchment in Germany. The inclusion oftheintegratedsurface‐groundwaterflowmodelresultsin systematicpatternsin therootzonesoilmoisture, which influence exchange flux distributions and the ensuing atmospheric boundary layer development. In a first comparison to observations, the 3D model compared to the 1D model shows slightly improved predictions of surface fluxes and a strong sensitivity to the initial soil moisture content.