都市とその周辺における気候変動

Abstract

For an understanding of the expected impacts of the urbanization and the increasing green-house gases, we make a preliminary analysis of long-term trends of the daily maximum and minimum surface air temperatures and the diurnal temperature range at several stations in the urban area and its surrounding sub-urban or rural regions.At most observing sites except a few stations in local cities we can find the rising long-term trend of minimum temperature and the decreasing trend of diurnal temperature range and such long-term trends are seen even in the non-urban area, such as Shionomisaki and Mt.Ibuki.From the present preliminary analysis we may conclude that the warming trend of the minimum temperature and the decreased diurnal tempera-ture range in the urban area are mostly due to the urbanization, and that the slightly increasing trend in the rural or mountain region may be largely attributed to the increase of green-house gases.