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Development of a Multilayer Urban Canopy Model Combined with a Ray Tracing Algorithm

机译：多层城市冠层模型的开发结合光线跟踪算法

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This study introduces a new multiple-layer urban canopy model (MUCM) combined with a ray-tracing algorithm. In the model, we parameterize the urban morphology as an infinite array of identical three-dimensional buildings separated by roads. Heat exchanges are solved for each urban surface at each vertical layer. The ray-tracing scheme is used to explicitly calculate the view factors as well as both the sunlit and shadow fractions of the urban surfaces during the daytime. As a test, we show that this combined MUCM accurately models observations at Kugahara, Tokyo. Thus, the combined MUCM is a new tool for urban climate modelers to more realistically represent radiative processes on urban surfaces. In particular, it may contribute to our understanding of urban climate in the mega-cities of Asia, which generally have high-rise buildings that are more difficult to model with simpler radiative schemes.
机译：本研究介绍了一种新的多层城市冠层模型（MUCM）与光线跟踪算法相结合。在该模型中，我们将城市形态学参数化为由道路分开的无限相同的三维建筑物阵列。每个垂直层的每个城市表面都解决了热交换。光线跟踪方案用于明确计算白天城市表面的阳光照射和阴影分数。作为一项测试，我们表明，这种联合的MUCM在东京kugahara准确地模拟了观察。因此，合并的MUCM是城市气候建模者的新工具，以更新地代表城市表面的辐射过程。特别是，它可能有助于我们对亚洲大城市的城市气候的理解，这通常具有高层建筑，更难以模拟更简单的辐射方案。

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