岡山大学環境管理センター Acta Medica Okayama 0917-1533 31 2009 岡山大学資源生物科学研究所における屋上緑化による建物冷却効果 21 25 EN Maki Katsuhara Shigemi Tanakamaru Izumi C. Mori Akio Tani Shigeko Utsugi Takashi Enomoto Toshihiko Maitani Roof greening is known to be environmentally friendly technology. Recently developed new roof greening systems, such as the thin-layer/Excel soil© system and the wetland type greening system, were tested at the roof top of buildings of Research Institute for Bioresources, Okayama University. After a multi-year test, these new systems have been established during high-temperature and less-rainfall summer seasons in the south Okayama region. Data indicated that roof greening effectively reduced the temperature of the concrete surface (more than 10°C). The room temperature under the green roof was also reduced both in a stock room (up to 6°C) and in an office room (about 2°C). We also provided the estimation indicating that this roof greening is useful for the decrease in CO(2) emission through the reduction of the electric power for air-conditioning in the summer. No potential conflict of interest relevant to this article was reported.

岡山大学資源生物科学研究所 Acta Medica Okayama 0916-930X 6 1 1999 岡山県における小麦・大麦の作況指数変動に対する気象要素の影響 13 19 EN Kazuyoshi Kimura Shigemi Tanakamaru The influences of air temperature, precipitation, number of rainy days and sunshine duration on the crop situation index of wheat, six-rowed barley and two-rowed barley in Okayama prefecture were analyzed by using the data for the 30-year-period of 1966-1995. The crop situation index of these three crops showed high negative correlation with the precipitation in April and a positive correlation with sunshine duration in April. Precipitation over 150 mm or lesser sunshine duration under 190 hrs in April seems to reduce the yield of wheat and barley in Okayama. No potential conflict of interest relevant to this article was reported.