| 研究実績の概要 |
The research is based on the development of a new field of study called, “Global Urban Climatology”. The concept is based on the hypothesis that urban areas have a significant impact to the atmospheric environment not only in the local scale but in the regional scale as well. It relies on globally available datasets of various meteorological and geographical parameters. Firstly, using global surface temperature data from Berkeley Earth, grid-estimated and station-observed monthly surface air temperature data from the 1960s to 2000s was acquired. Trends were estimated for top 30 megacities world-wide for the years 1960 to 1984 and 1985 to 2009. The trends estimated from the stations and the trends estimated from the wider comprising grid were compared. Temperature was found to increase much faster in the stations than in the comprising grids questioning the extent of representativeness of grid-estimated surface temperature. Currently, the derived trend differences are being compared with energy consumption and trends of other meteorological parameters such as wind speed and precipitation.
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