Abstract
The purpose of this study is to evaluate the thermal environment in forest for human behavior. We set three stations. Two are in the experimental plots controlled to classify the stand density in a Larix leptolepis and Pinus densiflora mixed stand plantation. The other one is in the grassland as the contrast station. At these station, we observed air temperature, humidity, global solar radiation, wind velocity, Oxford index, Sol air temperature and Windchill index in one weeks at four seasons. We made a comparative study of the thermal environment in the forest and the grassland. Analysis of the provided following results: (1) In summer, the hot environment in forest were eased by the descent of air temperature, global solar radiation and Sol air temperature. (2) In winter, the cold environment in forest were eased by the ascend of air temperature and the descent of wind velocity, Windchill index. Accordingly we found the forest envieonment were more comfortable than the glassland environment. (3) In summer, Oxford index of the forest were higher a little than the glassland, and it means discomfortable environment. We made a comparative study of the thermal environment in the high density plots and the low density plot. Analysis of the provided following results: (4) In the high density plot, the hot environment were eased by the descent of Sol air temperature, and the cold environment were eased by the descent of Windchill index. (5) The humidity had a relationship to the stand density. It suggested a possibility of the descent of Oxford index by the deduction of the stand dencity. (6) The global solar radiation had a relationship to the stand density. It suggested a possibility of the quantitative control of bright in the forest. Accordingly we found Sol air temperature and Windchill index were usefull for the evaluation of the forest environment for human behavior.
