Webジャーナル >  日本ヒートアイランド学会論文集 Vol.8 (2013)

日本ヒートアイランド学会論文集 Vol.8 (2013)

本文は「論文番号」または「 マーク」をクリックしてご覧ください。

13A00113A001学術論文
クズを利用した屋上緑化による熱環境改善効果について
Thermal Environment Improvement by Using Kudzu (Pueraria lobata (Willd.) Ohwi)in Rooftop Gardening

多田 雄一 Yuichi Tada*1 田代 崇郎 Takao Tashiro*1 坪井 聡史 Satoshi Tsuboi*2

*1 東京工科大学・応用生物学部 Sch. of Biosci. Biotechnol., Tokyo Univ. of Technol.
*2 東京工科大学・院・バイオ情報メディア研究科 Grad. Sch. of Bionics Computer Media Sci., Tokyo Univ. of Technol.

概要を開く

In order to utilize kudzu for rooftop gardening, appropriate cultivation methods of Kudzu were examined. The temperature of the concrete surface covered with potted kudzu was 5℃ lower than that of a non-shaded surface, and the temperature with hip-hydroponics cultivated kudzu was 10℃ lower. This result indicates that improvement in the thermal environment provided by kudzu is affected by the cultivation method. Among three plants species tested, the conductance and evapotranspiration rate were highest for hydroponics cultivated sweet potato, followed by hip hydroponics cultivated kudzu and then potted kudzu, indicating that the improvement in the thermal environment of concrete surface temperatures provided by plants is affected by the amount of evapotranspiration. It was also suggested that kudzu plants in Japan are diversed in the conductance, evapotranspiration rate and photosynthesis rate, which are related to ability to improve thermal environment.

13A00213A002学術論文
初冬早朝における緑地内外の気温分布調査 −代々木公園・明治神宮の事例−
An Investigation of air temperature distribution in-and outside of a wooded area in early winter morning -A case study for the Yoyogi-park and the Meiji-shrine-

岡田 牧 Maki Okada*1 若月 泰孝 Yasutaka Wakazuki*2 犬飼 俊 Shun Inukai*1 廣田 陸 Riku Hirota*1 日下 博幸 Hiroyuki Kusaka*3

*1 筑波大学大学院生命環境科学研究科 Graduate School of Life and Environmental Sciences, University of Tsukuba
*2 筑波大学アイソトープ環境動態研究センター Center for Research in Isotopes and Environment Dynamics, University of Tsukuba
*3 筑波大学計算科学研究センター Center for Computational Sciences, University of Tsukuba

概要を開く

A field experiment was performed in and surrounding built-up areas of the wooded area consisting of Yoyogi-park and Meiji-shrine in Tokyo on 1 December 2012 to examine the cool-spot phenomenon in early winter. The air temperature difference between the park and the surrounding built-up area was 1.8~2.9°C. The height of stable boundary layer reached 25m above ground level in the park during calm conditions. Air temperatures increased consistantly from the center of the park toward to the park boundary, but air temperature differences between inside the park and the surrounding built-up areas differed by location. For example, the air temperature difference in the east side of the park was 2.3°C, but it was 1.8°C in the west side. The largest air temperature difference was 2.9°C around Shibuya-station. The spatial distribution of the heights of buildings around the park was inhomogeneous to north, south, east, and west. For example, the average number of building floors in the south side of the park was higher than the west side. There was a positive correlation between the average number of building floors and air temperature difference from each of the built-up areas around the park. These results indicate the difficulty of selecting location points for obtaining the average air temperature difference between the park interior and surroundings.

13A00313A003学術論文
岡田・日下の黒球温度推定式の広域適用とパラメータ調整
Parameter adjustment and application to an extension area of Okada and Kusaka’s formula for the black globe temperature

岡田 牧 Maki Okada*1 岡田 益己 Masumi Okada*2 日下 博幸 Hiroyuki Kusaka*3

*1 筑波大学大学院生命環境科学研究科 Graduate School of Life and Environmental Sciences, University of Tsukuba
*2 岩手大学農学部 Faculty of Agriculture, Iwate University
*3 筑波大学計算科学研究センター Center for Computational Sciences, University of Tsukuba

概要を開く

Globe temperature is an important element of the Wet-bulb Globe Temperature (WBGT). The formula, derived in our previous study to estimate the globe temperature, was applied to the long-term records observed at four major cities; Tokyo, Nagoya, Osaka and Fukuoka. The ranges of the meteorological variables in the observation were large; solar radiation ranging from 2.8 W/m2 to 1083.3 W/m2 and wind speed ranging from 0.0m/s to 14.8m/s. The parameters of the equation were newly determined by fitting the equation to those records. The equation thus obtained as a function of solar radiation and wind speed estimated the observed globe temperature with root mean square error (RMSE) of 2.3 ℃. The errors in estimates by the equation changed largely neither city to city nor year to year. We thus, concluded that the equation with newly determined parameters was applicable to a wide range of climatic conditions and usable to predict WBGT.

戻る|このページの上に戻る