CONSTRUCTION OF LAND USE DATABASE BEFORE URBANIZATION FOR GLOBAL URBAN CLIMATE ANALYSIS

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  • グローバルな都市気候解析のための都市化前土地利用データベースの構築
  • グローバル ナ トシ キコウ カイセキ ノ タメ ノ トシカ ゼン トチ リヨウ データベース ノ コウチク

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Abstract

<p> In order to analyze the effects of urban warming, it is essential to estimate Urban Heat Island (UHI) and elucidate its mechanism. However, the method to estimate UHI, which has been studied by previous numerical simulation, is simplified by replacing land use before urbanization with vegetation not necessarily representing the background climate of the region. This leads to inaccurate UHI estimates</p><p> In this study, we construct a land use global database representing pre-urbanization for an improved numerical modeling of the UHI. This database makes it possible to compare urban meteorological conditions using current land use and those utilizing typical land use before urbanization for any city around the world. This study demonstrates the usage of the global database by comparing two simulation cases for 35 large cities and examining the tendency of UHI. Temperature rises are seen in both cities during the daytime and nighttime in many cities. The current work also hints the possible dependence of UHI on topography, building geometry, etc.</p>

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