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CLOUDS AND CLOUD AMOUNT AS BASIC DATA FOR THE THERMAL AND LUMINOUS ENVIRONMENT

Research Project

Project/Area Number 03452227
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 建築環境・環境工学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

NAKAMURA Hiroshi  KYUSHU UNIV.DEPT.OF ARCHITECTURE, PROFESSOR, 工学部, 教授 (10024209)

Co-Investigator(Kenkyū-buntansha) KOGA Yasuko  KYUSHU UNIV.DEPT.OF ARCHITECTURE, RESEARCH ASSOCIATE, 工学部, 助手 (60225399)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1991: ¥4,900,000 (Direct Cost: ¥4,900,000)
KeywordsCloud amount / Automatic measurement of cloud amount / Color of blue sky / Color of cloud / 青天空の色
Research Abstract

The following results suggest possibility of developing automatic long-term continuous measurement instrument of cloud amount. (1)Measurement of cloud amount and color of the sky Sky luminance and chromaticity of light from the sky were measured using a color luminance photometer. Besides, photographs with a fisheye lens and sletches of the sky were made. Visual judgment of sky conditions at each measurement point and visual observation of cloud amount were also made. (2)Determination of sky conditions by color temperature Color temperature of blue sky is higher than 10000K.Color temperatures of blue sky and cloud are mixed in lower than 10000K.Color temperature of cloud ranges from about 3000K about 8500K, and occurs frequently in the range of 5500K.It seems possible to judge sky conditions by color temperature at a large angular distance from the sun. (3)Numerical formula of color temperature of blue sky Color temperature of blue sky was expressed numerically with solar altitude, an elevation of the sky element, angular distance between the sky element and the sun, and atmospheric transmittance. (4)Regression equations on color temperature for the boundary between blue sky and cloud It si difficult to judge sky conditions only by color temperature at the low elevation and in the vicinity of the sun. Regression equations were obtained on color temperature for the boundary between blue sky and cloud in relation to each of solar altitude, an elevation of the sky element and angular distance between the sky element and the sun. (5)Comparison between the abserved cloud amount and the estimated cloud amount Cloud amount was estimated with the data re-sorted into the groups of blue sky and cloud according to the boundary conditions in (4). Cloud amount was estimated in another way by integrating the zones visually-judged as cloud. Comparison between the observed cloud amount and two kinds of the estimated cloud amount resulted in about 75% agreement allowing the differe

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 中村 洋: "雲量による天空光の考察" 平成4年度照明学会全国大会講演論文集. 61-62 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "天空光の色について" 平成4年度照明学会全国大会講演論文集. 63-64 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "雲量の測定に関する研究(空と雲の判別について)" 日本建築学会中国・九州支部研究報告. 9・2. 17-20 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "晴天空の色の数式化" 日本建築学会中国・九州支部研究報告. 9・2. 21-24 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "空と雲の判別方法に関する研究" 日本建築学会大会学術講演梗概集(関東). D. 1211-1212 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "雲量の測定に関する研究(推定雲量算出)" 日本建築学会九州支部研究報告. 34・2. 13-16 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga, Eisaku Nakamoto & Yuichiro Ota: "Examination of skylight by cloud amount" Proceedings of 1992 Annual Conference of the Illuminating Engineering Institute of Japan. 61-62 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga, Koichi Goto & Hiroyuki Saigo: "Color of the skylight" Proceedings of 1992 Annual Conference of the Illuminating Engineering Institute of Japan. 63-64 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga, Eisaku Nakamoto, Koichi Goto & Shin'ya Kojo: "Measurement of cloud amount (Distinction between blue sky and cloud)" Summaries of Technical Papers of Annual Meeting, AIJ, Chugoku and Kyushu Branches. 9-2. 17-20 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga, Koichi Goto Eisaku Nakamoto & Dai Yamanaka: "Formulation of color of blue sky" Summaries of Technical Papers of Annual Meeting, AIJ, Chugoku and Kyusyu Branches. 9-2. 17-20 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga, Eisaku Nakamoto, Koichi Goto & Shin'ya Kojo: "Study on the method of distinction between blue sky and clouds" Summaries of Technical Papers of Annual Meeting, Architectural Institute of Japan. D. 1211-1212 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Hiroshi Nakamura, Yasuko Koga & Eisaku Nakamoto: "Measurement of cloud amount (Estimation of cloud amount)" Summaries of Technical Papers of Annual Meeting, AIJ, Kyushu Branch. 34-2. 13-16 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 中村 洋: "雲量測定のための予備的考察" 日本建築学会九州支部研究報告. No.33. 17-20 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "天空光の色について" 平成4年度照明学会全国大会. 63-64 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "天空光による雲量の考察" 日本建築学会大会学術講演梗概集(北陸). 273-274 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "雲量の測定に関する研究-空と雲の判別について-" 日本建築学会中国・九州支部研究報告. Vol.9. 17-20 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "晴天空の色の数式化" 日本建築学会中国・九州支部研究報告. Vol.9. 21-24 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "空と雲の判別方法に関する研究" 日本建築学会大会学術講演梗概集(関東). 1211-1212 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 中村 洋: "雲量により天空光の考察" 平成4年度照明学会全国大会. 61-62 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 洋: "天空光の色について" 平成4年度照明学会全国大会. 63-64 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 洋: "晴天空の色の数式化" 日本建築学会大会学術講演梗概集(北陸). 275-276 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 洋: "天空光による雲量の考察" 日本建築学会大会学術講演梗概集(北陸). 273-274 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 中村 洋: "雲量測定のための予備的考察 天空光の色の測定 2.晴天空の輝度と色温度について" 日本建築学会研究報告 九州支部 環境系. 33. 17-20 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中村 洋: "雲量による天空光の考察" 平成4年度照明学会全国大会 講演予稿集. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中村 洋: "天空光の色について" 平成4年度照明学会全国大会 講演予稿集. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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