| Project/Area Number |
07458125
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokai University |
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Principal Investigator |
SASAKI Masako Tokai University, Institute of Research & Development, Professor, 開発技術研究所, 教授 (00090514)
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| Co-Investigator(Kenkyū-buntansha) |
TAKESHITA Shu Tokai University, Institute of Research & Development, Research Fellow of the Ja, 開発技術研究所, 学振特別研究員
ITO Atsushi Tokai University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80193473)
MATSUO Itsuro Tokai University School of Medicine, Associate Professor, 医学部, 助教授 (00051574)
SUGIURA Masahisa Tokai University, Institute of Research & Development, Professor, 開発技術研究所, 教授 (90179135)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1996: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1995: ¥4,400,000 (Direct Cost: ¥4,400,000)
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| Keywords | solar UV-B radiation / solar UV-B sky radiance / UV-B sky radiance distribution / Total radiation / solar UV-A radiation / solar UV-B sky radiance meter |
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| Research Abstract |
The solar ultraviolet-B (UV-B : 290-320 nm) sky radiation influences living things and materials on the earth's surface. To our knowledge, there are no reports on the analysis of the distribution of the solar UV-B sky radiance. The projects are to evaluate a solar UV-B sky radiance meter, to measure the distribution of the solar UV-B sky radiance and to analyze the effects of the solar UV-B sky irradiance on life and matters. We recently developed a new solar UV-B sky radiance meter to measure solar UV-B sky radiance and its distribution. The UV-B sensor of the radiance meter is based on the all-weather type UV-B radiometer developed by our laboratory. The radiance meter head has one UV-B sensor together with one Total (300-3000 nm) sensor, and these sensors can be replaced by UV-A (320-400 nm) sensors. The field of view of each sensor is 11 degrees (full angle). The sky radiance meter measures solar UV-B sky radiance every 12 degrees per 5 minutes scanning by personal computer control. To analyze cloud effects on the distribution of the solar UV-B sky radiance, an infrared all sky photograph is taken before scanning solar UV-B sky radiance. The distribution of the solar UV-B sky radiance is measured every half an hour from sunrise to sunset, and then a correlation between solar UV-B sky radiance and clouds is analyzed. Preliminary results of analysis of solar UV-B sky radiance indicate that the distribution of solar aureole of Total and that of UV-B are quite different, that is, the solar aureole of UV-B showed a wider spatial distribution than that of Total.
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