The Microclimate Characteristics Of Several Types Of Forest

The change of the forest microclimates has a significant influence on the ecological efficiency of the forest system,especially on the change of rynne temperature and humidity which manifests the effects of the forest on the partial little climatics. In addition to directly affect human comfort levels in the environment, the temperature and the relative humidity's changing also dose a direct effect on the fuel mosture ratio interior forest. As is known, the moisture of the forest fuels is one of the significant factors to the forest fire, so the research on the changing of temperal and the spatial variation rules of the temperature and relative humidity's has a great significance, so as it's relation to the fuel moisture of the interior forest.In this study, we choosed chinese fir platation, masson pine forest and schima superba fire belt, which are common seen in linan and jiande of zhejiang province, to monitoring the changings of the temperature and the relative humidity of the interior forest and the land surface in real-time. We compared that after the data's colllection from each sample plots, to find out the differences and the changing trends among the four different forest types. We established a linear relationship between the meterological data and the pratical monitoring data by statistical software. We study and compared the body comfort in different forest types from the temperature and humidity data in summer, and calculated and compared the forest fuel moisture from the data in winter. The results showed:(1) The annual variation trend of the meterological data is similar with the pratical monitoring data, and the the curves matched well. The positive correlation coefficient of the temperature and respective humidity are respectively R2=0.955 and R2=0.7209, so we can use the meterological data to represent the local temperiture'changing.(2) The monthly mean temperture variation of the four types: the temperature of Jan and Dec. are the lowest, and Aug. is the highest. The monthly mean relative humidity variation of the Interior forest is comparatively compicated. Compared with the vacant land, the four types forests'temperature and relative humidity's daily rang has a apparently decline. Compared among themselves, the order of the annul daily mean rang temperature is:fir(9.9℃)>massioon forest(9.50℃)>bamboo forest(8.90℃)> Schima superba (7.40℃), and the order of the relative humidity dily range is: massioon fores(18.19℃)>bamboo forest(16.69℃)>fir forest(15.31℃)> Schima superba (13.71℃). Generally, the microclimate regulation of broadleaved forest is higher than coniferous forest .(3) The cooling effects of the fir forest with the Schima superba forest are best at the high temperature period in summer, while the bamboo forest is the best at the low temperature; The humidification effects of the fir forest is best at the high temperature period in summer, while the lei bamboo forest is the best at the low temperature. Compared with the cooling effects , the humidification differences among the four type forests is insignificance; According to related exponents, we think that the fir and the Schima superba forest are better greenbelt types to human health while in summer.(4) The temperature are lowest at 6:30~7:00 while highest 14:00~14:30 in winter. The variation of the temperrature and the humidity of the four type forests is insignificant., the range of the temperature variation variation of bamboo is biggest , then the Schima, fir, and the massion. Different from the temperature, the relative humidity are lowest at 14:00 while highest at 7:30 . The range of the relative humidity variation of bamboo is biggest ,then the Schima,massion ,and the massion is the lowest. The order of the fuel mosture of the fire seasonal forest is bamboo forest(30.57)> Schima(27.31)>fir forest(2.04)>massion forest(117.43). According to the multiple analyze, the differences among fir forest , massion forest and bamboo forest is significant, fir forest and the Schima forest is insignificant; the massion forest and the bamboo forest is significant, and massion forest and Schima is insignificant.