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This study analyzed the microclimate factors and human comfort index inside and outside the Phyllostachys heterocycla forest of Qishan Natiional Forest Park in summer, and compared them with those of the city square. The results showed that: (1) In terms of the average daily temperature, the inner and outer forests and the city square ranked as follows: city square > outer forest > inner forest. The temperature of the inner forest was 5.41-10.31 °C lower than that of the city square, and the temperature of the outer forest was 4.41-9.51 °C lower than that of the city square. (2) In terms of the average daily relative humidity, the inner and outer forests and the city square ranked as follows: city square < outer forest < inner forest. Compared with the city sqaure, the inner forest had an increase of 8.21-31.51% in relative humidity, and the outer forest had an increase of 8.11-26.16% in relative humidity. (3) In terms of the average daily wind speed, the inner and outer forests and the city square ranked as follows: city square > outer forest > inner forest. The daily average value of the city square was 42% and 37% higher than that of the inner and outer forests, and the daily average value of the outer forest was 21% higher than that of the inner forest. (4) In terms of the daily average illumination intensity, the inner and outer forests and the square ranked as follows: city square > outer forest > inner forest. The daily average value of the city square was 97.38% and 74.33% higher than that of the inner and outer forests, and the daily average value of the outer forest was 89.78% higher than that of the inner forest. [ABSTRACT FROM AUTHOR]

This study used the dynamic headspace adsorption (DHS) to collect volatile organic compounds (VOCs) released from the Fokienia hodginsii forest in summer, and analyzed the the composition and concentration of VOCs and their correlation with environmental factors. The results showed that: there were 165 types of VOCs in the Fokienia hodginsii forest; the diurnal variation of the concentration of total volatile organic compounds (TVOCs) was "W"-shaped, the concentration reached its peak at 13:00-15:00 and its trough at 1:00-3:00; VOCs beneficial to human health mainly appeared at 13:00, while VOCs harmful to human health chiefly occurred at 11:00-19:00. The correlation analysis between the concentration of VOCs and climatic factors indicated that the concentration of VOCs was basically proportional to the temperature and illumination intensity and inversely proportional to the humidity and wind speed. In other words, the diurnal variation of the concentration was consistent with the diurnal variation of temperature and illumination intensity. [ABSTRACT FROM AUTHOR]

This study analyzed the microclimate factors and human comfort index of the inner and outer FoHenia hodginsii forests and of a city square. The results showed that ➀ In terms of the average daily temperature, the inner and outer forests and the city square tanked as follows: square > outer forest > inner forest The temperature of the inner forest was 8.21-11.73 °C lower than that of the city square, and the temperature of the outer forest was 7.41-10.34 °C lower than that of the city square. The inner forest was cooled by 24.21% and 1.37% respectively than the outer forest and the city square. ➁ In terms of the average daily relative humidity, the inner and outer forests and the city square ranked as follows: square < outer forest < inner forest The average daily relative humidity of the inner forest, the outer forest, and the city square was 68.57, 84.91, and 88.27, respectively. ➂ In terms of the average daily wind speed, the inner and outer forests and the city square ranked as: square > outer forest > inner forest. Their daily variation ranges were 0-0.75,0.18-0.43, and 0.12-0.31 m/s, respectively. ➃ In terms of the daily average illumination intensity, the inner and outer forests and the square ranked as: square > outer forest > inner forest Their average daily illumination intensities were 371.68, 4,582.01, and 17,641.63 lux, respectively. [ABSTRACT FROM AUTHOR]