Implementation of a new urban energy budget scheme in the MetUM. Part I: Description and idealized simulations
Implementation of a new urban energy budget scheme in the MetUM. Part I: Description and idealized simulations
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DOI：
10.1002/qj.668
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发表时间：
2010-07
影响因子：
8.9
通讯作者：
A. Porson;Peter Clark;Ian N. Harman;Martin Best;Stephen E. Belcher
中科院分区：
文献类型：
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作者：
A. Porson;Peter Clark;Ian N. Harman;Martin Best;Stephen E. Belcher
本文介绍了新的城市方案 MORUUSES（气象局-雷丁城市地表交换方案）的制定，用于气象局统一模型。新方案的实施确保了（1）新方案在建筑属性的参数化方面提供了更大的灵活性，从而提供了更真实的通量表示； (2) 批量输出与之前的观察研究吻合良好； (3) 新方案对能量平衡通量的影响与模拟当前城市方案的影响类似。除了拥有更好的物理基础之外，MORUSES 还获得了应用的灵活性以及对不同城市材料和城市规划的适应。新方案使用简单的二维几何图形将城市区域表示为由两块瓷砖、一个峡谷和一个屋顶组成的。对峡谷几何形状和屋顶檐篷厚度的敏感性分析强调了新方案所获得的灵活性。版权所有 © 2010 英国皇家气象学会和皇家版权所有
This paper describes the formulation of a new urban scheme, MORUSES (Met Office–Reading Urban Surface Exchange Scheme) for use in the Met Office Unified Model. The implementation of the new scheme ensures that (1) the new scheme offers more flexibility in the parametrization of the building properties, and hence provides a more realistic representation of the fluxes; (2) the bulk outputs are in satisfactory agreement with previous observational studies; and (3) the impact of the new scheme on the energy balance fluxes is similar to the impact of the current urban scheme when set up to mimic it. As well as having a better physical basis, MORUSES also gains in flexibility in applications and adaptations to different urban materials as well as urban planning. The new scheme represents the urban area as a composition of two tiles, a canyon and a roof, using a simple 2D geometry. Sensitivity analysis to canyon geometry and thickness of the roof canopy emphasizes the gain in flexibility captured by the new scheme. Copyright © 2010 Royal Meteorological Society and Crown Copyright