Initial results from Phase 2 of the international urban energy balance model comparison
Initial results from Phase 2 of the international urban energy balance model comparison
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DOI：
10.1002/joc.2227
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发表时间：
2011-02-01
期刊：
影响因子：
--
通讯作者：
Zhang, N.
中科院分区：
文献类型：
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作者：
Grimmond, C. S. B.;Blackett, M.;Zhang, N.
城市地表方案已被开发用来模拟城市地表的独特特征和相关的能量交换过程。这些模型是为一系列目的而开发的，并对相关过程的包含和表示做出了不同的假设。本文介绍了国际比较项目第二阶段的初步结果，该项目评估了32个城市地表方案。这是对这些模型的首次大规模系统评估。在四个阶段中，向参与者提供了关于直接观察城市通量的城市场址的越来越详细的信息。在每个阶段，每个组返回其模型计算的表面能量平衡通量。各个通量模型的性能差异很大。没有哪一种模型对所有通量都表现最佳。提供有关表面的附加信息通常会带来更好的性能。然而，有明确的证据表明，参数值选择不当会导致性能大幅下降，否则会表现良好的模型。由于许多模型不能在所有通量中表现良好，因此在其应用程序中需要谨慎，用户应该意识到对应用程序和决策的影响。版权所有。2010年皇家气象学会
Urban land surface schemes have been developed to model the distinct features of the urban surface and the associated energy exchange processes. These models have been developed for a range of purposes and make different assumptions related to the inclusion and representation of the relevant processes. Here, the first results of Phase 2 from an international comparison project to evaluate 32 urban land surface schemes are presented. This is the first large-scale systematic evaluation of these models. In four stages, participants were given increasingly detailed information about an urban site for which urban fluxes were directly observed. At each stage, each group returned their models' calculated surface energy balance fluxes. Wide variations are evident in the performance of the models for individual fluxes. No individual model performs best for all fluxes. Providing additional information about the surface generally results in better performance. However, there is clear evidence that poor choice of parameter values can cause a large drop in performance for models that otherwise perform well. As many models do not perform well across all fluxes, there is need for caution in their application, and users should be aware of the implications for applications and decision making. Copyright. 2010 Royal Meteorological Society