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

• Doan Van Q.

  Center for Computational Sciences, University of Tsukuba

• Kusaka Hiroyuki

  Center for Computational Sciences, University of Tsukuba

Abstract

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.

Journal

• SOLA

  SOLA 15 (0), 37-40, 2019

  Meteorological Society of Japan

Keywords

• Atmospheric Science

Details

• CRID: 1390282763100834432
• NII Article ID: 120007128074
• NII Article ID: 130007601805
• NII Book ID: AA12022899
• DOI: 10.2151/sola.2019-008
• ISSN: 13496476
• HANDLE: 2241/00155479
• Web Site: https://tsukuba.repo.nii.ac.jp/records/50025
• Web Site: https://www.jstage.jst.go.jp/article/sola/15/0/15_2019-008/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed