Parameter adjustment and application to an extension area of Okada and Kusaka’s formula for the black globe temperature.

  • Okada, M., M. Okada, and H.Kusaka, 2013: Parameter adjustment and application to an extension area of Okada and Kusaka’s formula for the black globe temperature. J. Heat Island Inst. Inter., 8, 13-21. 2013/11/14(Acknowledgement: SOUSEI, RECCA) (Citations:(web of science:0time, google scholar:0time)) .

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 °C. 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.

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